How many pounds of hydrogen are left in the tank?

Question

temperature is 268.5 kelvin

A sample of hydrogen gas in a 1,000 gallon tank 

inside pressure is 32.6

Answer 1

What is the pressure expressed as?  Is it atmospheres?  mm Hg?  kPa?

Use PV = nRT to solve for n (moles) after converting 1000 gallons to liters using 1 gal = 3.785 liters

Once you have the moles, convert that to grams by multiply by 2, the molar mass for H2 gas

Then convert the grams to pounds using 454 g = 1 pound