The mass and volume of each sample differ from the mass and volume of the other samples. Is it possible for each sample to contain 1 mol of each substance?No, because they have different masses.
No, because they have different volumes.
Yes, because the number of moles is not dependent on the mass or the volume.
Yes, because the number of moles is only dependent on the mass per unit volume.
Answers
Answer: Yes, it is possible for each samples to contain 1 mole of a substance because the number of moles are not dependent on the mass or the volume.
Explanation:
The formula for the number of moles is given by:
As, the masses of 2 samples are different, so the number of moles will be dependent only on the molar masses of the samples.
Volume has no effect on the number of moles.
Different elements and compounds have different molar masses. E.g. a mole of hydrogen would be very different from a mole of gold
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A series of five short lines. The first has an up and a down arrow, and is labeled below 1 s. The second has an up and a down arrow, and is labeled 2 s. The third has an up arrow and no label. The fourth has an up arrow and is labeled 2 p. The fifth has an up arrow and no label. Which element is this?
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which of the following is an example of how research into the effects of a chemical has changed how it is used
b)when the net force on an object decreases ,the objects acceleration increases
c)when the net force on an object decreases, the acceleration doesnt change
d)when the net force on an object decreases, the objects acceleration decreases
Answers
d. when the net force on an object decreases, the objects acceleration decreases
i took the test and got it right
(2) Reaction products contribute to acid rain.
(3) It is impossible to control nuclear fission.
(4) It is difficult to dispose of wastes
Answers
The problem that is commonly associated with nuclear power facilities is "It is difficult to dispose of wastes" Option D. This is further explained below.
What are nuclear power facilities?
Generally, Nuclear power plants are simply defined as using the heat generated by nuclear fission to heat water. Atoms are torn apart in nuclear fission to generate smaller atoms.
In conclusion, nuclear power facilities have waste compounds that are hard to decompose.
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(2) False, its burning coal that contributes to acid rain, since it contains sulfur
(3) False again, we can control the reaction with aptly named control rods, which are typically made of boron, to absorb some of the neutrons flying around in the chain reaction
(4) True, radioactive waste is very difficult to dispose of, and is also very dangerous. Sources of radiation can remain so for millions of years
Answers
Answer: First we have to understand that the normality of a solution is the gram equivalent weight of a solute per liter of solution. To find it we simply will have to have the necessary data to see the balanced equation.
I hope it helps, Regards.
Eg: H2SO4 + Na2OH ⇒ Na2SO4 + 2H2O
H2SO4 can neutralize 2 M of NaOH so equivalent of H2SO4 is 2 and that of NaOH is 1
For ions, equivalent is the number of charge and for acids or bases it is the acidity or basicity.
Equivalent weight is weight of 1 equivalent of any compound
Answers
q=the heat absorbed or released
n=the number of moles of the sample (in this case 2.78mol (50g/18g/mol))
ΔH(vap)=the heat of vaporization for the sample (in this case 40.7kJ/mol)
When you plug everything in you should find that 113.05kJ is needed to vaporize 50g of water. (the temperature does not change during a phase change since all of the heat absorbed is being used to break the intermolecular forces and none of it is being used to speed up the molecules).
I hope this helps. Let me know if anything is unclear.
Answers
IF there is a decrease in the temperature at the equator then it is possible that there is an increase in the speed of current.
Answers
Answer: It decreases.
Explanation: Solubility of gas in a particular liquid is the volume of gas in ml that can dissolve in unit volume of the liquid to form the saturated solution at the given temperature and under a pressure of 1 atmosphere.
Effect of temperature on solubility of gas:
Solubility of gas decreases with increase in temperature as on heating some gas is expelled out of the solution.
According to Le Chateliers principle , on increasing the temperature, the reaction will shift in a direction where temperature is decreasing i.e. backward direction and thus the solubility would decrease.