Question 1(multiple choice worth 2 points)
(01.03 mc)
complete this sentence. if mass remains the same while the volume of a substance
the density of the substance will
decreases, increase
increases, increase
increases, stay the same
decreases, stay the same
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question 1 (not answered)
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The answer is: If mass remains the same while the volume of a substance decreases, the density of the substance will increase.

Explanation:

Let's make an example:

If we have a wood block that's 1 kg, and the volume of the block is 1 cubic meter, that means that we have a wood block with a density of 1 kg/m3. If we now decrease the volume down to 0.2 cubic meters, while the mass stays at 1 kg, we suddenly have a change of density. Why?

If we now try to increase the volume of the wood block, with the mass increased as well, equal to the amount of increased volume, to get to 1 m3, we need to increase the size of the wood block 5 times, meaning the mass increases 5 times. So, we have now a wood block with a volume of 1 cubic meter and 5 kg, which leaves us with a density of 5 kg/m3, which is, again, 5 times higher than we started with.

if the concentration of products is decreased, the equilibrium will shift toward the products). add an inert gas (one that is not involved in the reaction) to the constant-volume reaction mixture: this will increase the total pressure of the system, but will have no effect on the equilibrium condition.

explanation: