Answer:
The basic molecular formula for water, H₂O, suggests a simple structure of three atoms in a straight line. But the physical properties of the three atoms force another arrangement — a “V” shape with oxygen at the point. This nonlinear shape transforms water into a remarkable substance with astounding abilities.
Explanation:
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chemical test for oxygen gas
Explanation:
You're required to put a glowing splinter of wood(red hot charcoal) into a test tube of unknown gas and if the wood starts burning again or rekindles. That gas is said to be oxygen. Although another gas that does that is dinitrogen(I)oxide but to differ them from each other, dinitrogen(I) oxide has a pleasant smell while oxygen is odourless.
A sealed container can hold 0.325 L of gas at 1.00 atm and 293 K. How many moles of gas can the container hold?
To find out how many moles of gas a container can hold, we can use the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.
We know that P = 1.00 atm, V = 0.325 L, and T = 293 K. We also know that the ideal gas constant R = 8.314 J/mol·K.
We can use this information to find the number of moles n in the container:
n = (PV) / (RT)
n = (1.00 atm * 0.325 L) / (8.314 J/mol·K * 293 K)
n = 0.0094 mol
So, the container can hold 0.0094 moles of gas.
How do you find the molar mass of an unknown?.
To find the molar mass of an unknown element/compound use the following steps:
Step 1: Using the chemical formula, calculate the number of atoms in each element in the compound.
Step 2: Multiply each element's atomic weight by the number of atoms in the compound.
Step 3: Total everything and assign a unit of measurement of grams/mole.
for eg: What is the molar mass of sodium carbonate (Na2CO3)?
Solution: Sodium carbonate contains two sodium atoms, one carbon atom, and three oxygen atoms. The atomic weight would be
Na : 2 x 23.0 = 46
C : 1 x 12.0 = 12
O : 3 x 16 = 48
When we add the total values, we get 106 (46 + 12 + 48).
As a result, Na2CO3 has a molar mass of 106 g/mole.
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the complete question is, how do you find the molar mass of an unknown element or compound?
match the volume to the correct graduated cylinder
• 21.3 ml
• 44.5 ml
• 6.6 ml
• 24.0 ml
• 75.0 ml
• 29.5 ml
• 38.0 ml
• 2.65 ml
Gradually graduated cylinders are available in a variety of sizes, or volume capacities, and, like a measuring cup, are used to determine volume by pouring liquid to the cylinder and comparing the liquid level to the graduated scale.
How do you determine the capacity of a graded cylinder?The volume that was measured is the same as the amount of liquid that was put inside the cylinder.
Similar to weighing, determining the volume of a liquid is a fundamental and common lab procedure. Both a graduated cylinder and a burette are commonly used to measure liquid volume.
A graded cylinder is, as its name suggests, a cylindrical glass or plastic tube that is sealed at one end and has a calibrated scale etched (or marked) on its exterior.
Gradually graduated cylinders are available in a variety of sizes, or volume capacities, and, like a measuring cup, are used to determine volume by pouring liquid to the cylinder and comparing the liquid level to the graduated scale.
The volume that was measured is the same as the amount of liquid that was put inside the cylinder. As a result, the graduated cylinder and similar apparatus (volumetric flasks, Erlenmeyer flasks, and beakers) are categorized as to-contain (TC) apparatus.
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what is the molecular formula if the empirical formula is c2h5 and the molecular molar mass is 58.14 g/mol?
[tex]C_4H_10[/tex] is the molecular formula of the compound with the given emperical formula.
what is emperical formula?The simplest whole-number ratio of the atoms in a compound is its empirical formula. It can be calculated by dividing the number of moles of each element in the compound by the least number of moles, which is done while assessing percent composition. It does not specify how the compound's atoms are arranged.
so let ( [tex]C_2H_5[/tex])[tex]_x[/tex] is the molecular formula of the compound with given emperical formula
so the molecular mass is given as:
2x* (mass of carbon) + 5x *(mass of hydrogen)
=> 2x*12+5x*1
=>29x
so 29x=82
=> x=2
so the molecular formula of compound is given as ( [tex]C_2H_5[/tex])[tex]_2[/tex]
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The groundwater in a certain area i being pumped out to provide drinking water. What mut happen for the water table to remain unchanged
For the water table to remain unchanged in an area where groundwater is being pumped out, the rate at which water is being pumped out must be equal to the rate at which water is being replenished through natural processes such as precipitation and surface water infiltration.
Key points:
Groundwater is water that is found underground in the spaces between rocks and soil.It can be pumped out using wells to provide drinking water, irrigation, and other uses.The water table is the level of underground water that can be found in an area.When the water is pumped out, the water table drops.To keep the water table unchanged, the rate of water pumped out must be equal to the rate of water replenishment by natural process.This is known as "sustainable yield".If the rate of pumping exceeds the rate of replenishment, the water table will drop over time.Conversely, if the rate of pumping is less than the rate of replenishment, the water table will rise.Learn more about the water table here:
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How many molecules are in 1. 8 moles of water?.
Answer:
1.08 x 10^24
Explanation:
The number of molecules in a given amount of a substance can be determined by using Avogadro's number, which is approximately 6.022 x 10^23 particles per mole.
To find the number of molecules in 1.8 moles of water, you would use the following calculation:
1.8 moles x 6.022 x 10^23 particles/mole = 1.0839 x 10^24 molecules
So there are about 1.08 x 10^24 molecules in 1.8 moles of water.
a solution is made from 23.5 g of glycerin in 130 g of methanol at 50 °c. what is the mole fraction of methanol? round your answer to the third decimal place.
Glycerin = C3H5(OH)3
Therefore, the mole fraction of methanol is 0.941. To calculate the mole fraction of methanol, you need to know the number of moles of methanol and glycerine present in the solution.
First, we need to calculate the number of moles of methanol in the solution. To do this, we use the molar mass of methanol (32.04 g/mol)
130g / 32.04g/mol = 4.05 moles
We also need to calculate the number of moles of glycerine in the solution. To do this, we use the molar mass of glycerine (92.09 g/mol)
23.5g / 92.09g/mol = 0.2555 moles
The mole fraction of a component is calculated by the number of moles of that component divided by the total number of moles in the solution.
Mole fraction of methanol = moles methanol / (moles methanol + moles glycerine)
= 4.05 moles / (4.05 moles + 0.2555 moles)
= 0.941
Therefore, the mole fraction of methanol is 0.941.
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Which is expected to have the largest dispersion forces?
a) C3H8
b) C12H26
c) F2
d) BeCl2
B: [tex]C_{12} H_{26}[/tex] is expected to have the largest dispersion forces.
Dispersion force is a type of intermolecular force that acts between normally electrically symmetric atoms and molecules; that is, the electrons and atoms are symmetrically distributed with respect to the nucleus.
The strength of dispersion forces usually increases with the number of electrons in the atom or molecule. In the given case, [tex]C_{12}H_{26}[/tex] contains a lot more electrons in comparison to [tex]C_{3} H_{8}[/tex],[tex]F_{2}[/tex], and [tex]BeCl_{2}[/tex]. Therefore, [tex]C_{12} H_{26}[/tex] is expected to have the largest dispersion forces.
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What will be the kinetic energy of a boy of mass 50 kg driving a bike with velocity of 2 ms 1?.
The kinetic energy of a boy with a mass of 50 kg driving a bike at a velocity of 2 m/s is 20 J (Joules).
The kinetic energy of an object is the energy it possesses due to its motion. It is calculated by using the formula KE = 0.5 * m * v^2, where m is the mass of the object in kilograms and v is its velocity in meters per second.
So, for a boy of mass 50 kg driving a bike with a velocity of 2 m/s, the kinetic energy can be calculated as follows:
KE = 1/2 * 50 kg * (2 m/s)^2
KE = 20 J
It's worth noting that kinetic energy is a scalar quantity and has no direction, so the velocity's direction does not affect the calculation. Additionally, the unit of kinetic energy is Joule (J) which is the SI unit of energy. Also, it's worth noting that this is a very small amount of energy, and it's unlikely that the boy would be able to do much work with it.
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kettle sours can be produced by adding food grade lactic acid in the kettle. True or False
It is true that kettle sours can be produced by adding food-grade lactic acid in the kettle
Lactic acid is a naturally occurring organic acid that is produced during fermentation by bacteria such as Lactobacillus. It is commonly used in food and beverage production as a flavor enhancer, preservative, and pH control agent.
Lactic acid is known for its tart, sour taste and is commonly found in fermented dairy products like yogurt and sour cream, as well as in sour beers and pickled vegetables.
Kettle sours are a type of sour beer that are made by adding food-grade lactic acid to the wort (unfermented beer) while it is still in the kettle. This allows the beer to sour without the need for a long aging process, which is required for traditional sour beer styles such as lambics or Berliner Weisse.
By controlling the amount of lactic acid added and the time it is added, brewers can produce a range of sour beers with different levels of sourness, from mild to tart. The use of food-grade lactic acid in kettle sours is considered a safe and widely used brewing practice.
Therefore, It is true that kettle sours can be produced by adding food-grade lactic acid in the kettle
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Which material would most likely contribute to humus out of basalt, granite, grass, and salt
Answer:
basalt
Explanation:
it’s rough on skin
what is the difference between organic and inorganic chemistry?
Inorganic chemistry is the study of the remaining (i.e., non-carbon-containing) subset of chemicals, whereas organic chemistry is defined as the study of molecules containing carbon.
The characteristics and behaviour of inorganic compounds, which include metals, minerals, and organometallic compounds, are the focus of inorganic chemistry. Chemistry that does not have a carbon-hydrogen link, such as inorganic elements and compounds that are found naturally in the earth, is known as inorganic chemistry. Life cannot exist without inorganic substances like carbon dioxide, oxygen, minerals, and water. The study of carbon-containing molecules' structure, characteristics, content, reactions, and synthesis is known as organic chemistry. The majority of organic compounds are composed of carbon and hydrogen, however they can also contain a variety of additional elements (e.g., nitrogen, oxygen, halogens, phosphorus, silicon, sulfur).
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(15 points) How has atomic theory changed over time, and what has stayed the same? What is still believed to this day, and what is something that is changed?
Answer: As new discoveries are made, existing theories are revised or replaced.
Dalton stated that atom is matter that can not be divided.
His "plum pudding" model (1904) suggested: the electrons are embedded in the positive charge.
J. J. Thomson discovered the electron in 1897.
According to Rutherford model of the atom:
1) Atoms have their charge concentrated in a very small nucleus.
2) Major space in an atom is empty.
3) Atoms nucleus is surrounded by negatively charged particles called electrons.
4) An atom is electrically neutral.
Explanation:
suppose that you run a reaction in ethanol to form a very non-polar organic substance. how would you extract your product?
There are a few methods through we can extract non-polar from the products (i) liquid liquid extraction (ii) solid-liquid extraction
Liquid-liquid extraction is a method for removing non-polar chemical compounds from molecules. This entails mixing the mixture containing the drug to be extracted with a non-polar solvent, such as hexane or ether. The material and the non-polar solvent will separate into layers that can be separated and collected.
The addition of a non-polar substance, such as silica gel, to the mixture will cause the non-polar organic substance to be adsorbed while the other ingredients stay in the liquid phase. This approach is known as solid-liquid extraction. The desired ingredient can then be removed from the solid by washing it with a non-polar solvent.
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Why do electrons stay in the electron cloud & not just fly off from around the nucleus of an atom?
The electrons stay in the electron cloud and do not fly off because of the stronger attraction to the proton.
In the electron cloud, the positive charge of the proton binds the electron from flying off since opposites attract. This allows the electrons to move around the nucleus of an atom. The nucleus is positively charged and the electrons that moves around the nucleus are negatively charged. so they attract each other. It is because the atom is so small. There are too many protons. some of the outer protons are loosely bound and more free to react with the electron. Most atoms do not have too many protons. so there is nothing for the electron to interact with. Therefore, each electron in a stable atom remains in its wavefunction shape.
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How much kinetic energy does a 50 kg object have if it is moving at a velocity of 2m s?.
100 Joules of kinetic energy will be produced by 50 kg of object.
The formula for kinetic energy is:
KE = 1/2 * m * v^2
where
KE = kinetic energy
m = mass of the object
v = velocity of the object
So, to find the kinetic energy of a 50 kg object moving at a velocity of 2 m/s:
KE = 1/2 * 50 kg * (2 m/s)^2
KE = 1/2 * 50 kg * 4 m^2/s^2
KE = 100 J (Joules)
So, the kinetic energy of the 50 kg object moving at a velocity of 2 m/s is 100 Joules.
It is worth noting that kinetic energy is a scalar quantity, meaning it does not have a direction.
It is also important to know that the kinetic energy of an object increases as the square of its velocity, so as the velocity increases, the kinetic energy increases rapidly.
In summary, kinetic energy is the energy an object possesses due to its motion, the formula to calculate kinetic energy is 1/2 * m * v^2, where m is the mass of the object and v is the velocity of the object. In this example, a 50 kg object moving at a velocity of 2 m/s has a kinetic energy of 100 Joules.
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This chemical equation represents a chemical reaction. H₂SO4 + 2LIOH Li₂SO4 + 2H₂O Which two chemicals are the products of the chemical reaction shown?
A. H₂SO4
B. H₂0
C. Li₂SO4
D. LIOH
Answer:
B and C
Explanation:
Sulphuric acid reacts with lithium hydroxide to produce lithium sulphate and water
H2SO4 + 2LiOH ---› Li2SO4 + 2H2O
Calculate the percent composition of phosphorus in magnesium phosphate.
The percent composition of phosphorus in magnesium phosphate is approximately 32.3%.
Calculate the percent composition of phosphorus in magnesium phosphate?The percent composition of phosphorus in magnesium phosphate can be determined by using the molecular formula of magnesium phosphate.The molecular formula for magnesium phosphate is Mg3(PO4)2.This formula contains three moles of magnesium (Mg) and two moles of phosphorus (P) combined with eight moles of oxygen (O).The percent composition of phosphorus can then be determined by dividing the number of moles of phosphorus (2) by the total number of moles of all elements in the compound (13), multiplied by 100.This calculation yields a percent composition of phosphorus in magnesium phosphate of 15.38%.Therefore, the percent composition of phosphorus in magnesium phosphate is 15.38%.To learn more about the percent composition of phosphorus in magnesium phosphate refer to:
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which atom in water is more electronegative, hydrogen or oxygen?
In a molecule of water, oxygen atoms have a higher value of electronegativity than the hydrogen atoms present in the said H2O molecule.
Electronegativity is a chemical property of elements or molecules that describes the tendency of an atom or a functional group ( molecule, for example) to attract electrons toward itself. The electronegativity value of an atom is affected by both its atomic number (denoted by Z) and the distance that its valence shell electrons reside from the charged nuclei. Electronegativity serves as a way to quantitatively estimate the bond energy of a bond, and the sign and magnitude of a bond's chemical polarity, that characterizes a bond along the continuous scale from covalent to ionic bonding.
In a water molecule, oxygen is more electronegative than hydrogen as oxygen is a smaller molecule with a higher number of protons. Oxygen pulls bonded electrons towards itself and thus in return gets a slightly negative charge while both hydrogen atoms get a slightly positive charge.
The electronegativity value of oxygen is 3.5 while that of hydrogen is 2.1.
Thus, the answer to the question is Oxygen.
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compare and contrast a current through a circuit with a static discharge
Compare between a static discharge and a current flowing via a circuit, A voltage source provides a constant current to a circuit. In a static discharge, the transfer of charge happens very quickly and discontinuously.
How are static discharges and electric currents different from one another?Since the charges in static electricity are at rest and build up on the inductor's surface, this is the main distinction between static electricity and current electricity. The conductor's internal flow of electrons is what generates the current's electricity.Distinguish between a static discharge and a current flowing via a circuit. The transfer of electrons from a negative to a positive charge occurs in both cases. A voltage source provides a constant current to a circuit. In a static discharge, the transfer of charge happens very quickly and discontinuously.Compare between a static discharge and a current flowing via a circuit, A voltage source provides a constant current to a circuit. In a static discharge, the transfer of charge happens very quickly and discontinuously.To learn more about static discharge refer to:
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How many molecules are in 11. 5 mol of H2O?.
There are 6.9253 x10²⁴ molecules in 11. 5 mol of H₂O
The total number of atoms or molecules in a sample can be calculated by multiplying the number of moles by the Avogadro constant. The formula is as follows:
number of molecule= moles x avogadro's number
One mole of material has 6.022x10² atoms, and equivalent volumes of various gases measured under the same conditions of temperature and pressure contain the same number of molecules.
number of molecule= moles x avogadro's number
number of molecule= 11. 5 mol x 6.022x10²³
number of molecule= 6.9253 x10²⁴
Therefore, there are 6.9253 x10²⁴ moleculesin 11. 5 mol of H₂O
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In metals, the valence electrons are considered to be
In metals, the valence electrons are considered to be continually moving from one atom to another and are not associated with any specific pair of atoms.
Metallic solids are made up of tightly packed atoms. In most cases, each metal atom's outermost electron shell overlaps with a large number of neighboring atoms.
As a result, valence electrons are constantly moving from one atom to the next and are not associated with any specific pair of atoms. In short, unlike covalently bonded substances, valence electrons in metals are nonlocalized, allowing them to roam relatively freely throughout the crystal.
The atoms left behind by the electrons become positive ions, and their interaction with valence electrons produces the coherent and consistent or binding thrust that holds the metallic particle next to each other.
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The equilibrium equation below shows ammonia hydroxide NH4OH decomposing into ammonium ions NH4 and hydroxide OH ions when is a system in equilibrium 
The equilibrium constant is 1.8 × 10⁻⁵ . The equilibrium equation below shows NH₄OH +H ⇌NH₄+H₂O
Calculating the equation:
Kw= 1 × 10⁻¹⁴
K= K× K` = 1.8× 10⁻⁵
How does equilibrium work?Chemical equilibrium is the state in which the reactants and products are present at concentrations that no longer tend to change over time, so that the system's properties cannot be seen to change.When the forward reaction proceeds at the same rate as the reverse reaction, this condition occurs.In most cases, the forward and reverse reaction rates are the same, not zero.As a result, the concentrations of reactants and products do not change significantly. Dynamic equilibrium is the term for such a state.Learn more about equilibrium equation:
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how are solar eruptions influenced by the sunspot cycle
changes in the Sun's magnetism produce a greater number of sunspots, more energy and cause solar eruptions of particles
describe the process of triangulation to locate an epicenter.
The process of triangulation to locate an epicenter are as follows.
What is triangulation?
Triangulation is a method used in surveying, navigation, and geography to determine the location of a point by measuring angles to it from known points at either end of a fixed baseline, rather than measuring distances to the point directly. This can be done by measuring angles to the point from two or more fixed locations, and then using trigonometry to calculate the position of the point.
Here is the general process of triangulation to locate an epicenter:
Seismographs, which are instruments that measure ground motion, are set up in different locations around the area of the earthquake.The time at which the earthquake's seismic waves are recorded by each seismograph is noted.Using the time difference between when the seismic waves were recorded at each seismograph, the distance from the epicenter to each seismograph can be calculated.These distances, along with the location of each seismograph, are then used to triangulate the location of the epicenter.This process can be done mathematically, by creating circles with radius equal to the calculated distance from the epicenter to each seismograph and finding the point at which the circles intersect.The intersection point is the estimated location of the epicenter.By following the above ways you can use the process of triangulation to locate an epicenter.
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What did I do wrong and how would I do this correctly?
The mass of Sodium Iodide (NaI) will react with 7.82 grams of Chlorine (Cl2) 16.49g.
What mass of Sodium Iodide?given specifications:
7.82g is the mass of chlorine gas.
Unknown:
Weight in NaI = mass / molar mass
Solution:
The following is the reaction equation:
2NaI + Cl2 becomes 2NaCl + I2.
Find the quantity of moles belonging to the identified species in order to solve this issue;
Number of Cl2 moles = 7.82 / 71
Cl2 has a molar mass of 2(35.5) = 71g/mol.
The number of moles is 0.11 moles.
from the equation for a balanced reaction;
2 moles of NaI and 2 moles of Cl2 will react.
Additionally, 0.11 moles of Cl2 and 0.11 moles of NaI will react.
Mass of NaI = 0.11 x 149.9 = 16.49g
The mass of Sodium Iodide (NaI) will react with 7.82 grams of Chlorine (Cl2) 16.49g
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Is CH4 a nonpolar molecule?.
[tex]CH_{4}[/tex], also known as methane, is a nonpolar molecule.
This can be seen in its molecular structure, which consists of four hydrogen atoms arranged symmetrically around a single carbon atom in a tetrahedral arrangement.
The four hydrogen atoms in methane have identical electronegativities, resulting in a uniform distribution of electrons around the carbon atom, making the molecule nonpolar.
[tex]CH_{4}[/tex] is a nonpolar molecule because its four bonded hydrogen atoms arrange themselves symmetrically around the central carbon atom, so that the positive and negative charges cancel each other out. This means that the molecule has no net dipole moment, making it nonpolar.
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What term describes a solution which is in equilibrium with an undissolved solute?
A)precipitating
B)aqueous
C)saturated
D)unsaturated
E)supersaturated
A solution in equilibrium with an undissolved solute is a saturated solution.
A homogeneous mixture composed of two or more substances is called a solution.
In a solution, there are two primary components, which are termed as,
Solute.Solvent.The minor component that is dissolved in a solution is known as the solute. The major component that dissolves the solute is known as the solvent.
At a given temperature and pressure, every solvent is capable of dissolving a particular amount of solute in it.
If a solution has dissolved as much as it is capable of dissolving, then the solution is known as a saturated solution.
Hence, a solution in equilibrium with an undissolved solute is known as a saturated solution.
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What is the mole of 2 H2O?.
Answer:
2H2O have water = 2×2=4moles.
Explanation:
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