7. Gases

Which of the following factors affects the solubility of a gas in a liquid solvent?

Which device disperses oxygen by using an air pump to the plants through a diffuser or air stone?

Which of the following best explains why a gas emits light (glows) when an electric current is passed through it in a discharge tube?

Which of the following correctly states Gay-Lussac's law?

At standard temperature and pressure (STP), what volume is occupied by 2.719 × 10^{13} moles of methane gas (CH_4)?

Which of the following best illustrates the use of gas stoichiometry in a real-world application?

Four identical containers (1, 2, 3, and 4) each hold a different sample of gas at the same pressure. The number of moles of gas in each container is as follows: Container 1: 2 mol, Container 2: 1 mol, Container 3: 3 mol, Container 4: 0.5 mol. Which container has the gas stored at the highest temperature?

Which of the following statements about the reaction of one mole of methane (CH_4) with oxygen at standard temperature and pressure (STP) is NOT correct?

When collecting gases over water, which correction must be made to determine the pressure of the collected gas?

As the pressure in the beaker was increased, what happened to the volume of the gas, assuming temperature and amount of gas remained constant?

Which of the following processes is an example of the Law of Conservation of Mass?

In a gas stoichiometry experiment, you performed the reaction using air instead of pure oxygen. How would this choice most likely affect the amount of product formed compared to using pure oxygen?

Which of the following gases is not considered a greenhouse gas?

When glucose (C6H12O6) is completely fermented according to the reaction C6H12O6 → 2 C2H5OH + 2 CO2, what volume of hydrogen gas (H2) at STP could be produced from 256 g of glucose?

A balloon filled with air is submerged into a tank of cold water. What will happen to the size of the balloon?