What is the volume occupied by 0.17 grams of gaseous H2S at 27◦C and 380 torr?

Answer 1

PV = nRT

V = (nRT)/P

n = mass/(molar mass)

Calculate molar mass from the periodic table:

H: = 1.008 x 2 = 2.016

S = 32.066 x 1 = 32.066

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H₂S molar mass = 34.082 g/mol

n = 0.17/34.082 = 0.004988 moles

T = 27 + 273.15 = 300.15 K

Look up "R" in units of torr, K, = 62.36 (L•Torr)/(mol•K)

V = (nRT)/P

V = (0.004988)(62.36)(300.15)/380 = 0.246 liters