Approximately how many moles of Kr⁺ are contained in the laser tube at 0°C and 1 atm?

Consider the reaction:

2 SO₂(g) + O₂(g) → 2 SO₃(g)

a. If 285.5 mL of SO₂ reacts with 158.9 mL of O₂ (both measured at 315 K and 50.0 mmHg), what is the limiting reactant and the theoretical yield of SO₃?

An herbicide is found to contain only C, H, N, and Cl. The complete combustion of a 100.0-mg sample of the herbicide in excess oxygen produces 83.16 mL of CO2 and 73.30 mL of H2O vapor expressed at STP. A separate analysis shows that the sample also contains 16.44 mg of Cl. (b) Calculate its empirical formula.

Isooctane, C₈H₁₈, is the component of gasoline from which the term octane rating derives. (d) How many moles of air are necessary for the combustion of 1 mol of isooctane, assuming that air is 21.0% O₂ by volume? What is the volume in liters of this air at STP?

What is the density of xe gas at stp

Use the molar volume of a gas at STP to calculate the density (in g/l) of nitrogen gas at STP.

At STP, what is the volume occupied by 33.5 g of argon gas?

What is the volume of 3.5 moles of oxygen gas (O₂) at standard temperature and pressure (STP)?