Answer:
A.
Step-by-step explanation:
The volume of a cylinder containing 2.00 g of hydrogen gas measured at 1.5 atm and 30 °C is 2.0 L.
Here's how to solve this problem:
Calculate the number of moles of hydrogen gas.
Number of moles = mass / molar mass
Number of moles = 2.00 g / (2.016 g/mol) = 0.993 mol
Use the ideal gas law to find the volume of the hydrogen gas.
The ideal gas law is PV = nRT, where:
P is the pressure (1.5 atm)
V is the volume (unknown)
n is the number of moles (0.993 mol)
R is the gas constant (0.082057 L atm/mol K)
T is the temperature (30 °C + 273.15 K = 303.15 K)
1.5 atm * V = 0.993 mol * 0.082057 L atm/mol K * 303.15 K
V = 2.0 L
Therefore, the volume of a cylinder containing 2.00 g of hydrogen gas measured at 1.5 atm and 30 °C is 2.0 L.