Answer:
C2H3
Explanation:
The empirical formula is the simplest whole number ratio of atoms of each element in a compound while the molecular formula shows us the actual number of atoms of each element
Writing C8H12 in a ratio:
8 : 12
This can be simplified by dividing by a common factor present in both numbers
8 and 12 can be divided by 4
8 ÷ 4 = 2 and 12 ÷ 4 = 3, hence the ratio is:
2 : 3
This cannot be simplified any further
Thus, the empirical formula is C2H3
Margarita decides to enter her school's science fair. She has always loved flowers and wants to incorporate them into her
project. In the end, Margarita decides to test the effectiveness of different types of plant food (fertilizer) on a certain type of
rose bush. Her goal is to determine which fertilizer produces the tallest rose bushes with the greatest number of flowers.
Describe how Margarita might set up her experiment. Discuss the actions Margarita should take to get reliable data.
Answer: Statistics is the best way for Margarita to organize, interpret, and present her data.
Explanation:
Rank these compounds by their expected solubility in hexane, C_6H_14.
Based on its solubility in hexane, C₆H₁₄. Then the order of these compounds is C₃H₈ → CH₃OH → H₂O
Non-polar compounds are compounds that are formed due to the existence of a bond between electrons in the elements that form them. This happens because the bonding elements have the same or nearly the same electronegativity value.
Polar compounds have a high dipole moment, while nonpolar compounds do not have a dipole moment. This difference causes the two solutions to not bond.
Hexane is non-polar.
So, C₃H₈ is the easiest to dissolve because C₃H₈ is also non-polar.
H₂O is more polar than CH₃OH. So, CH₃OH will dissolve more easily than air. air will at least dissolve.
So that the order based on its solubility with hexane is C₃H₈, CH3OH, H₂O.
Your question may incomplete, for complete questions it's in the picture.
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An atom is neutral. Its nucleus contains two protons and two neutrons. How many electrons does the atom have?
A. Three
B. Four
C. Two
D. Zero
Answer:
C Two
Explanation:
no of proton = no of electron
PLEASE HELP ASAP!!!!
ANSWERS FOR THE LAST PHOTO
W
X
Y
Z
An atom is made up of three subatomic particles namely; protons, neutrons and electrons.
The proton is the positively charged particle in the nucleus of the atom while the electron is the negatively charged particle surrounding the nucleus.
The number of neutrons can be calculated by subtracting the atomic number of the element from the mass number.
In question 1 of the above image, no of neutrons = 39 - 19 = 20 neutronsIn question 2, no of neutrons = 207 - 82 = 125 neutronsLearn more about neutrons at: https://brainly.com/question/28992636
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geologists attempting to locate metallic mineral resources such as copper and iron will first consider the ____ of the rock and how it formed.
Minerals can be located using geochemical surveys and remote sensors that analyze satellite images. Following that, mining or quarrying is used to remove many minerals.
What do you do to find mineral resources first?Search for Potential Deposits, Locating areas that are likely to contain mineral deposits is one of the first steps in the exploration process. Prospective areas might be close to other known mineralization areas or to active mine sites because mineral deposits frequently form in clusters.Minerals can be located using geochemical surveys and remote sensors that analyze satellite images. Following that, mining or quarrying is used to remove many minerals. Pumping, however, can be used to extract liquid minerals like oil or gas.When choosing which deposit to pursue, some factors include the deposit's location and shape, the rock's strength, the grade of the ore, the costs associated with mining it, and the commodity's current market price.To learn more about minerals refer to:
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Which prediction best shows what the population could look like after many generations? What caused it to change?
Prediction 1 best shows what the population could look like after many generations. Because, the long beak traits is having more life time.
What is genetic traits ?Each characteristics in a living thing is created by a respective genetic coding in its body. The genetic code which is responsible for a particular behavior or appearance is called a genetic trait.
Here, the prediction 1 is best . It already saying that long-beak hummingbirds are more likely to survive, that baby survived long enough to pass on its mutation, so the long-beak trait became more common over generations.
Prediction 2 says abut a genetic trait which is less fit to survive. Hence, cannot affect the next generation population. Therefore, prediction 1 is best.
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Your question is incomplete. But your complete question probably was:
Prediction 1 :Two hummingbirds with short or medium beaks had a baby with a mutation in its genes for the long-beak trait.
Prediction 2 is best. A hummingbird could have been born with a mutation in its genes for the long-beak trait and lived for a little while.
What is the major attractive force that exists among different I2 molecules in the solid? Select one: A. covalent-ionic interactions. B. Dispersion forces. C.
The claim that sense neurons' cell bodies are located in the grey commissure, an expanded region of the dorsal root.
Dorsal nerve roots provide sensory neural signals to the central nervous system from the peripheral nervous system. Anatomically, a dorsal root ganglion develops from the dorsal root of the spinal nerves. For the central nervous system to react, they transmit sensory data from multiple peripheral receptors. It is generally recognised that DRG has a role in chronic pain. The first description of anaesthesia infiltration of the DRG was made in 1949. It has been possible to target the DRG using the dorsal root entry zone (DREZ), a nearby related neural target, dorsal rhizotomy or gangliectomy, conventional radiofrequency denervation, pulsed radiofrequency, and steroid injection.
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The actual volume of molecules of gas is negligible as compared to the total volume of gas since:
a A large volume is occupied by empty spaces
b A fewer number of molecules are present
c Both A and B
d None of the above
The actual volume of molecules of gas is negligible as compared to the total volume of gas since C. Both A and B.
The Ideal Gas LawThe actual volume of molecules of gas is negligible as compared to the total volume of gas because the majority of the gas is made up of empty spaces. The gas is composed of discrete particles, or molecules, that are separated by a tremendous amount of empty space, and the number of molecules present is incredibly small compared to the total volume of the gas. When a gas is confined to a container, the number of molecules within the container is fixed, and the volume of the container is also fixed. However, the spacing between the molecules is not fixed and can be manipulated. Since the total volume of the container remains the same, but the spacing between the molecules can be changed, the actual volume of molecules present is negligible as compared to the total volume of the gas.This phenomenon is known as the Ideal Gas Law, and it states that the pressure of a confined gas is directly proportional to its temperature and inversely proportional to its volume. The greater the temperature, the more energy the molecules have and, consequently, the closer they are to each other. This means that the actual volume of molecules present is much smaller than the total volume of the gas.Therefore, the actual volume of molecules of gas is negligible as compared to the total volume of gas because the majority of the gas is made up of empty spaces and the number of molecules present is much smaller than the total volume of the gas.
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What are the two types of carbohydrates and food sources?.
Answer: simple and complex.
Explanation:These are also called simple sugars. They're found in refined sugars, like the white sugar you see in a sugar bowl. If you have a lollipop, you're eating simple carbs.
What is the kinetic energy a car with a mass of 1500kg running with a velocity of 20m s to the east?.
The kinetic energy of a car with a mass of 1500 kg running at a velocity of 20 m/s to the east is 60000J (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 car with a mass of 1500 kg running with a velocity of 20 m/s to the east, the kinetic energy can be calculated as follows:
KE = 1/2 * 1500 kg * (20 m/s)^2
KE = 60000 J
By plugging these values into the formula, we can find that the car's kinetic energy is 60000 J (Joules). It's worth noting that kinetic energy is a scalar quantity and has no direction, so the velocity's direction (east) does not affect the calculation.
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If the molecular mass of the salt is 136 g/mol, how many moles of anhydrate are there?
if the mass of the sample is 272 grams, the number of moles of anhydrate present would be:
moles = 2
What are moles?Generally, To determine the number of moles of anhydrate present, you would need to know the mass of the sample. If you have that information, you can use the formula:
moles = mass / molar mass
Where
mass is the mass of the sample in grams and
molar mass is the molar mass of the salt (in this case, 136 g/mol).
For example, if the mass of the sample is 272 grams, the number of moles of anhydrate present would be:
moles = 272 / 136
= 2
Please provide me with more information so that I could give you more accurate answer.
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Nitrogen monoxide reacts with hydrogen gas to form nitrogen gas and water (vapor). Write a balanced equation for this reaction. The reaction is experimentally found to be (approximately) first-order in H
2
and second-order in NO. Write down the form of the experimentally-determined rate law and the units of the rate constant.
We must now strike a balance. This portion is all guesswork, but look at nitrogen on the right; there are two of them, so we put a "2" next to nitrogen monoxide.
We then count to check whether everything is balanced, and we'll notice that there are now two oxygens on the left and only one on the right, so we'll put a "2" next to the water. Count again, and lastly, a "2" next to the hydrogens will give us a balanced equation of:nitrogen monoxide. Now there are rate laws. If your reaction was A+B—>C+D. The rate law is equal to some empirically established constant "k" times the concentration of the reactants increased to some value. power (also empirically determined) (also experimentally determined). So the general form is as follows: Alpha and Beta are just the order of the reactants. Because the question specifies the sequence of each reactant, your rate law should look like this.
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Given g(x) = f(x) + k, enter the value for k that transforms the function f into g?.
The value for k that transforms the function f into g is -3.
What is the meaning of value for k?
Value for k is a term used in mathematics to refer to the number of elements in a set. The value of k depends on the context of the problem. It could be any numerical value, depending on what it is being used for.
Given : g(x) = f(x) + k
Taking two points from the graph (1,0) and (-1, 2)
slope = [tex]\frac{2-0}{-1-1}[/tex] = [tex]\frac{2}{-2}[/tex] = -1
The equation will be,
y-0 = -1 (x-4)
y= -x + 4
f(x)= -x + 4
So, g(x)= f(x) + k
-x + 1= -x + 4 + k
k= 1+4
k= -3
Therefore, the value for k= -3.
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The radius of a barium atom is 217
pm. How many barium atoms would
have to be laid side by side to span a distance of 2.60 mm?
12,005 barium atoms would have to be laid side by side to span a distance of 2.60 mm
What is barium atoms?Barium can be defined as a chemical element with the symbol Ba and atomic number 56.
To find the number of barium atoms that would have to be laid side by side to span a distance of 2.60 mm.
we need to divide the distance by the radius of one barium atom:
2.60 mm / 217 pm = 12,005
Therefore, 12,005 barium atoms would have to be laid side by side to span a distance of 2.60 mm.
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How many grams are in 2. 0 moles of H2O?.
Answer:
36g
Explanation:
H2 = 2
O = 16
18 = Mr of H2O
mass = moles x Mr
mass = 2 x 18
mass = 36g
How many Br- ions are present in 1.00 moles of FeBr3? a. 1.81E24 b. 6.02E23 c. 6.02E25 d. 12.04E23
B) The number of Br- ions present in 1.00 moles of FeBr3 is 6.02E23.
To find the number of Br- ions present in 1.00 moles of FeBr3, we need to first determine the number of moles of Br- ions present in the compound. FeBr3 is a compound that contains 1 Br- ion per formula unit.
To find the number of moles, we can use the formula:
moles = number of atoms / Avogadro's number (6.02E23)
The number of moles of Br- ions in 1.00 moles of FeBr3 is:
1.00 moles x (1 Br- ion / 1 formula unit) = 1.00 moles
So, the number of Br- ions present in 1.00 moles of FeBr3 is 6.02E23 ions.
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acid rain is the result of pollutants being released into the____
The acid rain is the result of pollutants being released into the atmosphere.
What is acid rain ?
Nitric and sulfuric acids, which are included in acid rain and other dry, abrasive particles that fall to the ground, can harm the surfaces of sculptures, buildings, and other man-made structures. Metal is corroded by the acidic particles, which also hasten the aging of stone and paint.
What is pollutants ?
A material that is present in concentrations that could be harmful to creatures (including people, animals, and plants) or go beyond the limits of acceptable environmental quality is referred to as a pollutant. Frequently, the words "term" and "contaminant" are used interchangeably.
Therefore, acid rain is the result of pollutants being released into the atmosphere.
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Rearrange the work equation and show the equation for force.
Work equation: W=Fxd
Answer:
Force=Work done÷ distance travelled
Explanation:
To do this, you want to make the Force variable on its own so you divide d on both sides to get F=W/d
Hope this helps.
which elements are most likely to react in the same manner in a chemical reaction?
The elements most likely to react in the same manner in a chemical reaction are those that are in the same group. It because of the same number of valence electrons.
The elements in the same group are most likely to react in the same manner in a chemical reaction. It is because their outer shells have the same number of valence electrons. In fact, the electrons are the component of an atom that is involved in reactions. Meanwhile, the protons and neutrons in an atom's nucleus are not involved in reactions.
For example:
Elements in the Group 1 (Alkali metals) contains Li, Na, K, Rb, Cs, and Fr.- They all have one valence electron, which they easily lose when forming ions.
- They are easily reacted with water
- They possess low melting points and densities
- They are good electrical conductors.
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What is the boiling point, in °C,
of a 0.743 molal aqueous
solution of KCL?
BP(water) = 100 °C
Kb (water) = 0.512 °C/m
[?] °C
The boiling point in °C, of a 0.743 molal aqueous solution of KCL is 100.761 ∘ C
What is the boiling point, in °C?Δ T b≡ T b − T * b = I K b m ,
where:
The difference between the solution's boiling point, T b, and the pure solvent's boiling point, T * b, in degrees Celsius, is known as T b.
The van't Hoff factor, or the actual number of solute particles in solution, is denoted by the letter i.
The water boiling point elevation constant is K b = 0.512 C/m.
mol solute/kg solvent is the solution's molality, or m. Does the solute have a high or low volatility?
Considering complete dissociation.
KCl ( a q ) → K + ( q ) + Cl − ( a q )
Additionally, 1+1=2i, thus...
T b = T * b + i K b m
= 100 ∘ C + 2 ⋅ 0.512 ∘ C/m ⋅ 0.743 m
= 100.761 ∘ C
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what is a test variable and a outcome variable
pls help me
The test variable is manipulated while the outcome variable is observed.
What is a variable?When we use the term variable, our minds would have to go to something that has the ability to change. As such, when we are carrying out an experiment there is the variable that we manipulate and this would lead to a change in another variable.
The variable that we are able to manipulate as we are carrying out the experiment is what we call the test variable while the one that is changed due to this manipulation is called the out come variable.
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Why do we not just calibrate the gas thermometer at absolute zero? - Waiting for equilibrium at absolute zero would take much more time than is available - Measuring absolute zero requires liquid deuterium for coolant which is expensive - Absolute zero cannot practically be produced in any lab setting - Condensation of water vapor in the lab would raise the temperature
We do not just calibrate the gas thermometer at absolute zero because absolute zero cannot practically produced in o any lab setting.
Reason -
In order to cool a substance to absolute zero (-243-15°C), an unlimited amount of work would be required to remove the heat from it. Therefore, it is essentially impossible to create an environment with an absolute zero temperature.
Because absolute zero cannot effectively be manufactured in any lab setting, we cannot calibrate our thermometer at that temperature due to letter C. Since we cannot create absolute zero,
a thermodynamic system has its lowest energy at absolute zero degrees Celsius. It is equivalent to 459.67 degrees Fahrenheit and 273.15 degrees Celsius, respectively, on the thermometer.
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What are valence electrons
Answer:
Valence electrons are electrons located in the outermost energy level (Responsible for bonding.)
Explanation:
Hope this helps :)
How many molecules are the in 1.8g of water molecules
Answer:
6.022 x [tex]10^{22}[/tex] molecules
Explanation:
One mole of any substance has 6.022x [tex]10^{23}[/tex] particles.
Mr of water: 16 + 2 = 18 g
moles of water given: 1.8/18 = 0.1 moles
Using ratio:
moles : molecules
1 : 6.022x [tex]10^{23}[/tex]
0.1 : X
X = 0.1 x (6.022x [tex]10^{23}[/tex] )
X = 6.022 x [tex]10^{22}[/tex]
chemically, the three layers of the Earth's interior, stated in order from center to surface, are the(1)
The three layers of the Earth's interior, stated in order from center to surface, are the core, mantle and the crust.
What is Earth?
Earth is the planet we live on, one of eight planets in our solar system and the only known place in the universe to support life. Earth is the third planet from the sun, after Mercury and Venus and before Mars. It is about 150 million kilometers (about 93 million miles) from the sun. This distance, called an astronomical unit (AU), is a standard unit of measurement in astronomy. Earth is one AU from the sun.
The planet Jupiter is about 5.2 AU from the sun—about 778 million kilometers (483.5 million miles). Earth is the largest and most massive of the rocky inner planets, although it is dwarfed by the gas giants beyond the Asteroid Belt.
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Please helpppp nowww pleaseeee
Answer:
phosphorus=38.27%
hydrogen=2.47%
oxygen=59.26%
In the activity series, the more active elements are found
(a) at the bottom
(b) in the middle
(c) at the top
(d) both (a) and (c)
In the activity series, the more active elements are found at the bottom and at the top. Option d.
The activity series is a way of organizing elements according to their reactivity.
The elements found at the bottom of the series are the most active, and those found at the top are the least active.
Knowing the activity series can help us predict how a reaction will proceed, and can be a useful tool when determining which compounds are most likely to form in a given reaction.
The elements at the bottom of the activity series are the most active, and the elements at the top are the least active. Knowing the activity of elements can help you understand the chemical properties of different materials and how they may interact with each other.
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In an experiment searching for the photoelectric effect, an incident beam of green light produced no ejected electrons from a metal. In order to eject electrons, the experimenter should?
A. increase the brightness of the light.
B. try blue light.
C. try yellow light.
D. give up on that particular metal.
E. decrease the brightness of the light.
To remove electrons in the photoelectric experiment, experimenters must try blue light. (B)
Definition of PhotoelectricThe photoelectric effect occurs when one of the metal plates is exposed to light, there is a current going to the other metal plate, as has been detected by the ammeter in the circuit above.
The ability of light to move electrons depends on its frequency. So if for example the light intensity is small but the frequency is large, the electrons will still be able to escape.
The energy that causes this movement of electrons is from the electromagnetic waves of light.
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What is hydropower development?.
Answer:
Hydropower technologies generate power by using the elevation difference, created by a dam or diversion structure, of water flowing in on one side and out, far below, on the other.
A gold atom i a phere with a diameter with 272 pm and a ma with 3. 27x 10^-13 ng. Calculate the denity of one gold atom in g/cm ^3
The answer is 3.88 g/cm³ for density.
How can you figure out a sphere's density?When you know the radius, you may use the formula volume = (4/3) π r3 to calculate the sphere's volume. Then, using the formula mass = volume density, you can calculate the mass by multiplying the volume by the density: mass = volume density. The formula mass = (4/3) π r3 density can also be used.
Given,
Radius of gold sphere is equal to 272 pm or 272 × 10 ⁻¹² m.
= 2.72 10 10 m 10²cm/m.
The diameter of an atom of gold is 2.72 × 10⁻⁸ cm,
volume of sphere = πr³
V(Au) = 4/3 · (2.72·10⁻⁸ cm)³ · 3.14.
The volume of one atom of gold is 8.43·10⁻²³ cm³
Mass of atom of sphere is equal to 3.27·10⁻¹³ ng · 10⁻⁹ g/ng
Gold atom mass is 3.27·10⁻²² g grams,
density of sphere = mass of gold atom ÷ Volume of gold atom
density of sphere = 3.27·10⁻²² g ÷ 8.43·10⁻²³ cm³
One gold atom has a density of 3.88 g/cm³
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