Question

Think about the lab procedure you just read. Label each factor below with V for variable or C for constant.

Temperature of the gas:
Volume of the gas in the syringe:
Weight put on the syringe:
Number of moles of gas in the syringe:
Mass of gas in the syringe:
Number of gas molecules in the syringe:
Hypothesis: If the pressure on a gas is increased, then its volume will decrease because the gas molecules will be pushed closer together. (This is in accordance with Boyle's law):

P = kV-1

The words underlined above are the only variables for the lab procedure; the other factors are constant. Therefore, this procedure will help you test the hypothesis.

Answer 1

Temperature of the gas: C
Volume of the gas in the syringe: V
Weight put on the syringe: V
Number of moles of gas in the syringe: C
Mass of gas in the syringe: C
Number of gas molecules in the syringe: C

Reason: The test is of Boyle’s law (pressure vs. volume) so pressure (varied by changing the weight) and volume are the variables; temperature and the amount of gas are held constant.