Chemistry question

Question

What is density of C2H6 if the pressure is 3.77 atm and the temperature is 442K?

Answer 1

Use PV = g/M RT where g is the mass of the gas in grams, M the molecular mass (approx. 30 g/mole), R gas constant (0.0821 Latm/mole-deg), T the absolute temperature (442 K), P pressure in atm.

Rearranging the first equation where density is g/V.

D = g/V = PM/RT

Solve for D to get 3.77 atm x 30 g/mole / (0.0821 Latm/mole deg x 442 K) = 3.12 g/L.

Please check math.