The amount of energy a person has burned while practicing yoga for one hour can be calculated by converting kilocalories (kcal) to joules (J).
How many joules (J) of energy have they burned?One kcal is equal to 4184 J. Therefore, if a person has burned 285 kcal, they have burned 285 x 4184 = 1197140 J of energy.When the body burns energy, it does so by releasing heat. This heat is measured in joules. Any form of physical activity, such as yoga, can cause the body to burn energy, and thus release heat. The amount of energy burned during a physical activity is determined by the intensity and duration of the activity.The energy burned during yoga depends on the type of poses and exercises done, as well as the individual's level of fitness. Generally, more strenuous poses and exercises will burn more energy than gentler ones. The more intense the activity, the more energy the body will burn.When the body burns energy, it is converted into fuel for the muscles. This fuel helps maintain the body's temperature, power muscle contractions, and provide energy for cells. The energy burned during yoga is converted into ATP, which is used to provide energy to cells.In conclusion, if a person practicing yoga for one hour burns 285 kcal, they have burned 1197140 J of energy. This energy is used to power muscle contractions, maintain body temperature, and provide energy for cells.1 kcal = 4184 JTherefore, the person has burned 1189340 J of energy.To learn more about energy conversion refer to:
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ariel shabtaicl 6.1 bonding energy and bond types868210 of 18question 10 listenice, h2o(s), is classified asan ionic compounda molecular compounda homogeneous mixturea heterogeneous mixturehide toolbar zoom: standard
H2O(s), or water in its solid state, is classified as a molecular compound
A molecular compound is a type of chemical compound made up of molecules. These molecules are composed of atoms from two or more different elements that are chemically bonded together. The atoms are held together by covalent bonds, in which electrons are shared between atoms. Examples of molecular compounds include water (H2O), carbon dioxide (CO2), and sugar (C12H22O11).The chemical structure of water, H2O, consists of two hydrogen atoms (H) and one oxygen atom (O). The chemical bond between the hydrogen and oxygen atoms is a covalent bond, in which electrons are shared between the atoms. The molecule has a bent shape with an angle of 104.5 degrees between the hydrogen atoms.
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Which of the following options correctly reflect the relationship between SI units and units containing decimal prefixes? Select all that apply. Check all that apply. O 1 millimole contains 1000 moles. 1nm-10 m; hence there are 10° nm in 1 m. O There are 1000 g in one kg. O There are 10 microseconds in 1 second.
There are 1000 g in one kg. It is a correctly reflect the relationship between SI units and units containing decimal prefixes.
What is meant by SI units?
Other coherent derived units may be expressed using a combination of the seven base units and the 22 coherent derived units with unique names and symbols.The SI offers twenty-four prefixes that, when applied to the name and symbol of a coherent unit or units, produce twenty-four additional (non-coherent) SI units for the same quantity since the sizes of coherent units will be convenient for some purposes but not for others.The coherent unit's decimal multiples and submultiples are always the non-coherent units.The SI is designed to be a dynamic system; new units and prefixes are added, and unit definitions are changed through international agreement as measurement technology develops and measurement accuracy rises.To learn more about SI units refer to
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you found an unknown substance and it is green-blue in color, it is a solid, and is not malleable. the unknown substance has a melting point of 24.3 oc and a density of 5.621 g/m3. the unknown sample is flammable and reacts with oxygen gas to form an oxide. determine the volume in units of hl of this unknown sample if you have 14.5. grams. keep in mind significant figures and only input a numerical value.
An unknown substance and it is green-blue in color, it is a solid, and is not malleable. The volume of this unknown sample if you have 14.5 grams is 2.75 × 10⁶ ml.
The properties of the substance is : green-blue in color, it is solid, and is not malleable.
The formula for the density is given as :
The density = mass / volume
where,
The density = 5.621 g/m³ = 5.261 × 10⁻⁶ g/ml
The mass = 14.5 g
The volume is = mass / density
The volume = 14.5 / 5.261 × 10⁻⁶
The volume = 2.75 × 10⁶ ml
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Which atomic models in task 1 are not supported by Thomson’s experimental evidence? For each of these models, explain the experimental results that the model would predict.
The atomic models in task 1 that are not supported by Thomson’s experimental evidence are Dalton's atomic model and Rutherford model.
Why are they not supported by Thomson’s experimental evidence?Dalton's atomic model proposed that atoms were indivisible and indestructible, and that atoms of different elements had different weights and properties. But Thomson's experiment, which found that atoms are divisible and can be split into smaller particles called electrons, disproved this model.
Also, Rutherford's atomic model proposed that atoms were made up of a dense central nucleus of protons and neutrons, surrounded by a cloud of electrons. But Thomson's experiment, which found that electrons are spread evenly throughout the atom and not concentrated in a central nucleus, disproved this model.
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Time Left 98 minutes Item 9: Question The conversion of lodocyclohexane to cyclohexene occurs via the following 2-step mechanism H H H H H + --- 0 1 H H H H H This conversion of lodocyclohexane to cyclohexene would be classified as a Ny reaction Submit Submit and Next elimination substitution Mark this question for later review addidtion Skip to Previous Skip to Next →
An elimination reaction would be the conversion carbon of lodocyclohexane to cyclohexene. An elimination reaction is a chemical process that involves the removal of two substituents.
from the same carbon molecule, resulting in the production of a double bond. Lodocyclohexane is transformed to cyclohexene in two steps by the removal of two substituents, culminating in the creation of a double bond. This process is unique to elimination reactions, as opposed to substitution reactions, which entail the substitution of one substituent with another.double bond. Lodocyclohexane is transformed to cyclohexene in two steps by the removal of two substituents, culminating in the creation of a double bond.l the substitution of one substituent with another.double bond. Lodocyclohexane is transformed to cyclohexene in two steps by the removal of two substituents,.
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Which of the following descriptions and/or equations best represents the enthalpy change of a system? There may be more than one correct answer.
A. The heat absorbed or released during a phase change or chemical reaction at constant pressure
B. The work done on or by a phase change or chemical reaction at constant pressure
C. deltaH = deltaE + PdeltaV
D. deltaE = q + w
E. H= E + PV
The heat absorbed or released during a phase shift or chemical reaction at constant pressure is what option a, in terms of equations, best describes the enthalpy change of a system.
Is the heat change in a system described by enthalpy?At constant pressure, a system's enthalpy (H) represents its heat capacity. Chemists often gauge how reactants transform into products by measuring changes in the enthalpy of chemical systems. The same thing as the enthalpy change, which is denoted by the symbol H, is the heat that a process at constant pressure absorbs or releases.A chemical reaction causes a change in the system's enthalpy, which is determined by the volume of the system's gas, its pressure, and its internal energy.The heat absorbed or released during a phase shift or chemical reaction at constant pressure is what option a, in terms of equations, best describes the enthalpy change of a system.To learn more about enthalpy change refer to:
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a student adds a 1g sample of an unknown, brittle solid to distilled water, stirs the mixture, and then measures its conductivity. the student repeats this procedure with more samples of the unknown solid and then produces the graph above. which of the following statements about the graph and the properties of the solid is correct? The increase in conductivity indicates that the unknown is an ionic solid that dissociates into ions when it dissolves in waterThe increase in conductivity indicates that the unknown is a network covalent solid that ionizes in waterThe straight line plot indicates that the unknown solid is infinitely soluble in waterThe straight line plot indicates that the unknown solid has a very low solubility in water.
The increase in conductivity indicates that the unknown is an ionic solid that dissociates into ions when it dissolves in water.
What is meant by conductivity?
The ability to conduct or transmit energy, such as the electrical resistivity's inverse.Conductivity and resistance are important characteristics of materials that determine how much resistance a typical cube of material has to current flow.Electrical resistance and conductance are complementary broad qualities that determine an object's resistance to an electric current.The ability of an aqueous solution to convey an electric current is measured by its conductivity.If these materials are coupled to a power source, electrons can move freely and smoothly between two points.For conducting electricity, metals like copper, iron, gold, aluminium, and silver work best.To learn more about conductivity refer to
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How many liters of a 0.26 M solution of Na₂MnO4 would contain 0.38 mole of Na₂MnO4?
The molarity of the solution (0.26 M). The result is 1.46 L, which is the volume of the solution that would contain 0.38 mole of Na₂MnO4.
What is molarity?Molarity is a unit of measure used to indicate the concentration of a solute in a solution. It is expressed in moles of solute per liter of solution (mol/L). This measure is useful for describing the amount of a particular chemical species present in a solution, as well as for determining the amount of a reactant or product that is produced in a chemical reaction. Molarity is also used to calculate the amount of a substance that must be added to a solution to achieve a desired concentration.
The number of liters of a 0.26 M solution of Na₂MnO4 that would contain 0.38 mole of Na₂MnO4 can be calculated using the following equation:
Volume (L) = moles (mol) / Molarity (M)
Therefore, the volume of a 0.26 M solution of Na₂MnO4 that would contain 0.38 mole of Na₂MnO4 is:
Volume (L) = 0.38 mol / 0.26 M
Volume (L) = 1.46 L
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A chemical becomes hazardous waste when you no longer need it. Click on the examples of Hazardous Waste. Click "Submit" to advance. Abandoned chemicals Chemicals that can't be used or are unwanted Residues in chemical containers Unlabeled chemicals Chemicals in deteriorating containers Food Conflicting labels (more than 1 or a label that does not match contents) Pipette tips not contaminated with hazardous materials
Examples of hazardous waste are: Abandoned chemicals, Chemicals that can't be used or are unwanted, Residues in chemical containers, Unlabeled chemicals, Chemicals in deteriorating containers
"Food" and "Pipette tips not contaminated with hazardous materials" are not examples of hazardous waste. Hazardous waste is defined as any material that is potentially dangerous or harmful to human health or the environment. They are regulated by the government and require special handling and disposal. A hazardous material, also known as a hazardous substance or a dangerous good, is any material that poses a potential threat to human health or the environment if not handled or disposed of properly. These materials may be in the form of liquids, solids, gases, or chemicals and can include things like pesticides, acids, explosives, radioactive materials, and toxic substances
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Dr. Clark works with people who have had a heart attack. She is trying to help them
make good diet and exercise choices to reduce the possibility of having another
heart attack in the future. She is most likely a(n)
A) counseling psychologist.
B) educational psychologist.
C) health psychologist.
D) social psychologist.
She most likely works as a health psychologist because she combines resistance training with cardio exercise (jogging, swimming, and bicycling) (moderate weightlifting).
Can physical activity lessen heart attacks?A healthy heart is mostly dependent on physical activity. It's one of your best tools for building up your heart muscle, controlling your weight, and defending your arteries against damage brought on by high blood pressure, blood sugar, and cholesterol that can result in a heart attack or stroke.
Which activity is most beneficial for mental health?Aerobic exercise, such as jogging, swimming, cycling, walking, gardening, and dancing, has been shown to lessen anxiety and depression.
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identifying the 5 types of chemical reactions identify each of the reactions below as one of the 5 types of reactions (rxn): synthesis reaction decomposition reaction single replacement reaction double replacement reaction combustion reaction answer key
5 types of chemical reaction are as follows with example- decomposition reaction, single replacement reaction, double replacement reaction, combustion reaction.
1. Fe + O2 = FeO: This is a synthesis reaction. It involves the formation of a new compound (FeO) from simpler reactants (Fe and O2).
2. 2H2O2 = 2H2O + O2: This is a decomposition reaction. It involves the breakdown of a more complex compound (H2O2) into simpler products (H2O and O2).
3. Zn + CuSO4 = ZnSO4 + Cu: This is a single replacement reaction. It includes swapping out one ingredient in a compound for another. In this case, Zn replaces Cu in the compound CuSO4.
4. Fe(NO3)2 + K2Cr2O7 = FeCr2O7 + 2KNO3: This is a double replacement reaction. It involves the exchange of positive ions between two compounds to form two new compounds.
5. CH4 + 2O2 = CO2 + 2H2O + heat: This is a combustion reaction. It involves the burning of a hydrocarbon (CH4) in the presence of oxygen to produce carbon dioxide, water, and heat.
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How do solvents affect polymers?
Solvents affect the polymers in way that they affect the strength of non-bonding interactions, which in return control the formation of supramolecular polymers in solution.
Solvents affect the polymers in way that they affect the strength of non-bonding interactions, which in return control the formation of supramolecular polymers in solution. Solvent effects and implications/parameters measured in supramolecular polymer systems are selectively reviewed. A rather new solvent scale, solvation ability (SA), which is based on the balance point between extended and stacked polymers is then introduced.
One of the most common processes used to produce polymer nanoparticles, is the solvent-displacement method, wherein the polymer is first dissolved in a "good" solvent and then the solution is mixed with an "anti-solvent". The processability of the polymer is therefore determined by polymer's structural and transporting properties in solutions of pure solvents and at the intermediate compositions.
If we put a polymer molecule into a pure solvent, three things might happen to it.
-it might curl up on itself
-it might not really notice/react with the solvent
-it might prefer the solvent used, to itself, and stretch out.
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a student measures the volume of a gas sample at several different temperatures. the results are tabulated as follows:
a. The temperature of a gas is directly proportional to its volume
c. The temperature-to-volume ratio of a gas is constant. are the correct options.
Determine the temperature to volume ratios using three significant figures:
298 / 4.55 = 65.5
315 / 4.81 = 65.5
325 / 4.96 = 65.5
These figures then demonstrate a constant temperature-to-volume ratio, which may be represented mathematically as follows:
Volume x Temperature has a straight proportional fluctuation of constant (the volume increases in a constant proportion to the increase of the temperature).
A gas's volume and temperature are inversely proportional. A gas always has the same ratio of temperature to volume. The data in the table show that volume increases at the same rate as temperature.
complete question:A student measures the volume of a gas sample at several different temperatures. The results are tabulated as follows:Temperature of gas (K) Volume of gas (L)
298 4.55
315 4.81
325 4.96
335 Formulate a tentative law from the measurements.Check all that apply.
a. The temperature of a gas is directly proportional to its volume.
b. The temperature of a gas is inversely proportional to its volume.
c. The temperature-to-volume ratio of a gas is constant.
d. The temperature-to-volume ratio of a gas isn't constant.
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HELP ME OUT PLEASE!!!!!!
Instead of Fossil Fuels to generate power, nuclear energy uses ___________
Oil
Coal
Uranium
Gas
Instead of Fossil Fuels to generate power, nuclear energy uses Uranium. Therefore, among all the given options, the correct option is option C.
What is Fossil Fuels?Any of a group of hydrocarbon-containing compounds of biological origin that are found in the Earth's crust and may be utilized as a source of energy are known as fossil fuels.
Coal, petroleum, oil and gas, oil shales, bitumen, tar sands, other heavy oils are examples of fossil fuels. Even before Devonian Period (419.2 to 358.9 million years ago), the majority of carbonaceous material came from algae and bacteria, but the majority of carbonaceous material that formed during and after that time came from plants. Instead of Fossil Fuels to generate power, nuclear energy uses Uranium.
Therefore, among all the given options, the correct option is option C.
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Name two substances that when reacted together, will produce the soluble salt, sodium nitrate
Answer:
Sodium nitrate can be produced by reacting sodium hydroxide (NaOH) and nitric acid (HNO3) together.
Explanation:
Sodium nitrate is produced by the reaction between sodium chloride (NaCl) and nitric acid (HNO3). The chemical equation for this reaction is:
NaCl + HNO3 → NaNO3 + HCl
In this reaction, sodium chloride (table salt) and nitric acid react to form the soluble salt, sodium nitrate and hydrogen chloride as a byproduct. The reaction is exothermic and generates heat.
Silver nitrate and sodium chloride are both soluble
Select the equation that has the following mole ratio:
2:6:2:3
The chemical equation which has the given mole ratio is 2 Al + 6 HCl → 2 AlCl₃ + 3 H₂.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
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when chlorine is added to water, a dissociation occurs. when we add cl2 (chlorine) h2o (water), we get a reaction which leaves us with hocl (hypochlorous acid) hcl (hydrochloric acid). how much of each is created is dependent on water temperature, and especially on water ph. hypochlorous acid is the active, killing form of chlorine. this is what does the real sanitizing work in your pool water. the chlorine molecule or ion kills microorganisms by slashing through the cell walls and destroying the inner enzymes, structures and processes. when this occurs, the cell has been deactivated, or oxidized. the hypochlorous molecule continues this slash
Chlorine reacts reversibly with water to give a mixture of hypochlorous acid and hydrochloric acid.
Cl2+H2O⇔HOCl+HCl
Because of this reaction, it is able to act as a disinfectant for water sterilization.
What is sterilization?
Sterilization is a process that removes, kills, or inactivates all life forms (especially microorganisms such as fungi, bacteria, spores, and unicellular eukaryotic organisms) and other biological agents, such as prions, present in or on a particular surface, object, or fluid.Sterilization can be achieved in a variety of ways, including heat, chemicals, irradiation, high pressure, and filtration. Sterilization differs from disinfection, and pasteurization in that these methods reduce rather than eliminate all life forms and biological agents present. After sterilization, the object is referred to as sterile or aseptic.To know more about sterilization, click the link given below:
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Based on the molecular views, classify each substance as an atomic element, a molecular element, an ionic compound, or a molecular compound.
A molecular compound is defined as a molecule whose formula states the actual number of atoms bonded together in the molecule.
The atoms are joined to give a definite shape which is defined by the angles between the bonds and by the bond lengths. Molecular compounds can contain discrete molecules, which are held together by sharing electrons in covalent bonding.
Examples of molecular compounds are water, which contains H2O molecules; methane contains CH4 molecules; and hydrogen fluoride, which contains HF molecules.
As a rule of thumb, compounds that are involved in a metal binding with either a non-metal or a semi-metal will display ionic bonding.
Compounds can be composed with only non-metals or semi-metals and non-metals will display covalent bonding and will be classified as molecular compounds.
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Which of the following are square properties? Choose ALL that apply.
Four right angles.
Exactly one pair of parallel sides.
Diagonals are perpendicular.
Diagonals are congruent.
The properties of a square are;
Four right angles.Diagonals are perpendicular.Diagonals are congruent.What is a square?We know that a square is one of the types of the quadrilaterals that we have in mathematics. The implication of this is that the square would have four sides.
If the square has four sides then it is possible that we can be able to draw a diagonal that would run from one point to the other across the square and this can be said for all the quadrilaterals. This is how now know the square.
Hence, the square can be said to be a quadrilateral figure.
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CAN SOMEONE HELP WITH THIS QUESTION?✨
The volume of a piece of copper with a weight of 48.218g is 5.45mL.
How to calculate volume using the graph?A graph is a data chart (graphical representation of data) intended to illustrate the relationship between a set (or sets) of numbers (quantities, measurements or indicative numbers).
According to this question, a graph is shown above with mass (g) on the y axis and volume (mL) on the x axis.
Based on the data provided in the graph, the following expression was given:
y = 8.8521x
y represents the mass while x represents the volume
48.218g = 8.8521x
x = 48.218 ÷ 8.8521
x = 5.45mL
Therefore, 5.45mL is the volume at that weight.
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Please hurry
Which of these substances would likely
increase in ocean water when nearby
rivers flood?
J Carbonate
K Sulfate
L Potassium
M Nitrate
Answer:
M - Nitrate is likely to increase in ocean water when nearby rivers flood.
Explanation:
As the nitrogen compounds are carried into the ocean, the nitrogen can be used by phytoplankton and other marine organisms, which can lead to a bloom of these organisms. This in turn can lead to an increase in the concentration of nitrate in the ocean water.
Density is a physical property that relates the mass of a substance to its volume.
Calculate the density, in g/mL, of a liquid that has a mass of 0.125 g and a volume of 0.000225 L.
density:
Calculate the volume in milliliters of a 4.91-g sample of a solid with a density of 3.41 g/mL.
volume:
Calculate the mass of a 0.267-mL sample of a liquid with a density of 0.660 g/mL.
mass:
answer:
3004838
Explanation:
3+939$
Consider the balanced reaction:
C3H8 + 5 O2 → 3 CO2 + 4 H2O
How many mol of C3H8 must be consumed via this reaction to produce a partial pressure of 3.68 atm of CO2 in a 4.00 L container at 355 K?
The number of moles of C₃H₈ that must be consumed via the given reaction is 0.168 mole
How do I determine the number of mole of C3H8 consumed?We'll begin by obtaining the mole of CO₂ produced. Details below:
Pressure (P) = 3.68 atmVolume (V) = 4 LTemperature (T) = 355 K Gas constant (R) = 0.0821 atm.L/Kmol mole of CO₂ (n) =?PV = nRT
3.68 × 4 = n × 0.0821 × 355
Divide both sides by (0.0821 × 355)
n = (3.68 × 4) / (0.0821 × 355)
n = 0.505 mole
Finally, we shall determine the mole of C₃H₈ consumed by the reaction. This is illustrated below:
C₃H₈ + 5O₂ -> 3CO₂ + 4H₂O
From the balanced equation above,
3 moles of CO₂ were obtained from 1 mole of C₃H₈
Therefore,
0.505 mole of CO₂ will be obtained from = (0.505 × 1) / 3 = 0.168 mole of C₃H₈
Thus, number of mole of C₃H₈ consumed is 0.168 mole
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which of the following compounds is a gas at room temperature? ch3ch2och2ch3 ch3ch2ch2ch2ch2ch3 h2o ch4
[tex]ch3ch3ch3[/tex] is the one compounds is a gas at room temperature.
What is the ideal room temperature?
Generally speaking, room temperature refers to a range of air temperatures that people favour indoors. When someone is dressed in regular indoor attire, they feel at ease. Depending on humidity, air circulation, and other factors, human comfort can go beyond this range.
Around 20°C, or 68° Fahrenheit, is usually the standard room temperature. Though it's crucial to keep in mind that different rooms will need to be heated to different temperatures, this is a good ambient temperature to aim for.
Store at 15°-25°C (59°-77°F) above room temperature. Ambient temperature: Keep your items at the temperature outside. Considering the vast range of ambient temperatures, this word is not commonly used.
Molecules with the stronger intermolecular forces are pulled tightly together to form solid at higher temperatures and that's why the freezing point is higher.
Also, molecules with the stronger intermolecular force have greater interaction between the molecules and thus on heating do not boil easily and have high boiling point also.
Thus, melting point and boiling point increases with increase in number of carbon atoms and also increase in intermolecular forces (like hydrogen bonding, if present).
Thus, the compound which is gas at room temperature is because it has least number of carbon atoms and absence of hydrogen bonding.
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the graph shows all of the stable isotopes of elements according to the numbers of protons and neutrons in their nuclei. a graph titled zone of nuclear stability with number of protons from 0 to 80 on the x-axis with number of neutrons on the y-axis from 0 to 140. there are two lines, one with a slope of 1 from (0, 0). the other line has points of (20, 24), (40, 52) and (60, 120) labeled stability zone. which statements are supported by the graph? check all that apply.
1. For large atoms, more neutrons than
2. protons are needed to be stable.
Nuclei that have 90 or greater protons are always radioactive.
Isotopes are two or more types of atoms that have the same atomic number and place in the periodic table but differ in nucleon numbers because their nuclei contain differing quantities of neutrons. The atomic number of an element on the Periodic Table is determined by the number of protons in its nucleus. Carbon, for example, contains six protons and has atomic number 6.
Isotopes have chemical characteristics that are same but have drastically distinct nuclear properties. For example, hydrogen has three isotopes. Isotopes are used to define human illness, identify illegal drugs at international borders, sterilise medical equipment, and power space exploration batteries. Isotopes are also used in agriculture, astronomy, biology, chemistry, materials science, medicine, and nuclear safety studies.
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How much is a 0.05 change worth on the PH scale. 8.12-8.07
Answer: The solution will be 1.122018454x more acidic
Explanation: It's pretty simple, so since pH uses the Log scale, just do [tex]10^{0.05}[/tex]
And you'll get the answer. Also this gets less acidic since pH goes down.
Hope this helps!
A prescription medication requires 8.00 mg per kg of body weight. Express your answer to three significant figures.
The amount of medication required in grams per pound of body weight is 0.00363 g/lb.
What is the conversion factor between pounds and kilograms?The conversion factor between pounds and kilograms is given below:
1 kg = 2.20462 lb
The data given is as follows:
The prescription medication requirement = 8.00 mg/kg
We use the conversion factor to convert the given amount to grams per pound of body weight.
1 kg = 2.20462 lb
1 g = 1000 mg
Hence;
8.00 mg = 8.00 * 1 g/1000 mg
8.00 mg = 0.008 g
The given amount of medication required in grams per pound of body weight = 0.008 g / 2.20462 lb
medication required in grams per pound of body weight = 0.00363 g/lb
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Complete question:
A prescription medication requires 5.98 mg per kg of body weight. Convert this quantity to the number of grams required per pound of body weight. Express your answer to three significant figures.
You add 9.6g of iron to 23.60mL of water and observe that the volume of iron and water together is 24.82mL. Calculate the density of iron…. Express in Value & Units
Answer:
7.87g/mL
Explanation:
density is mass/volume...
you add 9.6g of iron. that is the mass
the water increases by 1.22ml, that is the volume
9.6g/1.22ml = 7.87g/mL
e) suppose you choose the initial masses so that both reactions produce pcl 3. explain how both of these chemical reactions obey the law of definite proportions, even though they produce different numbers of moles of the product. justify your answer with calculations.
The law of definite proportions states that regardless of the amount of reactants used, a chemical reaction will always produce the same proportion of products. In this case, both reactions will produce the same mole ratio of PCL3 (1:1) even though they produce different numbers of moles of the product. To demonstrate this, let's take a look at the first reaction:
Reaction 1:
2HCl + Ca3(PO4)2 → 2CaCl2 + PCl3
2 moles of HCl + 1 mole of Ca3(PO4)2 → 2 moles of CaCl2 + 1 mole of PCl3
Therefore, the mole ratio of PCL3 is 1:1.
Now let's look at the second reaction:
Reaction 2:
HCl + P4O10 → PCl3 + H3PO4
1 mole of HCl + 2 moles of P4O10 → 1 mole of PCl3 + 2 moles of H3PO4
Once again, the mole ratio of PCL3 is still 1:1. Therefore, both of these chemical reactions obey the law of definite proportions.
What is definite proportions?
Definite proportions law states that a given compound always contains the same elements in the same proportions by mass. This law, also known as the law of constant composition.
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science
describe the sexual reproductive of flowering plants like the gumamela flower by
creating your own story
Answer:
the organs of sexual reproduction is the flower. male gametes is found in pollen grains and produced in the anthers of the flower. female gametes i found in ovules and produced inthe ovary of the flower.
