7. Gases

At standard temperature and pressure (STP), a 50-gram sample of H_2O(l) and a 100-gram sample of H_2O(l) have:

At standard temperature and pressure (STP), which of the following cylinders will contain the greatest number of gas particles?

At standard temperature and pressure (STP), which of the following gases occupies the greatest volume if 1 mole of each is measured?

Which of the following correctly represents the standard temperature and pressure (STP) values at sea level?

At standard temperature and pressure (STP), which gas sample contains the same number of molecules as 2.0 liters of CH_4(g) at STP?

Which of the following correctly represents the values for standard temperature and pressure (STP) in chemistry?

At standard temperature and pressure (STP), one mole of which gas will occupy a volume of 22.4 liters?

At standard temperature and pressure (STP), which of the following samples of matter has the greatest average distance between its molecules?

At standard temperature and pressure (STP), which of the following substances has a standard enthalpy of formation (ΔH_f^\(\text{∘}\)) defined as 0 kJ/mol?

Under standard temperature and pressure (STP), what volume does one mole of an ideal gas occupy?

What is the mass (in grams) of 5.00 L of O₂ gas at standard temperature and pressure (STP)?

Compared with 1 mole of hydrogen gas at standard temperature and pressure (STP), 1 mole of argon gas at STP occupies:

Which of the following gases, when measured at standard temperature and pressure (STP), would occupy the greatest volume if 1 mole of each is considered?

At standard temperature and pressure (STP), which volume will be occupied by a gas containing 6.02 × 10^{23} atoms?