Question

How many moles of gas are in a gas sample occupying 0.73799999999999999 L at 135 mm Hg and 30° C?

A 0.0052700000000000004 mol
B 40.5 mol
C 190 mol
D 0.00043300000000000001 mol
E 4.0099999999999998 mol

Answer 1

Using ideal law gas equation-

PV = nRT

P = Pressure = 135 mmHg
V= Volume = 0.73799999999999999 L
n = moles = ??
R= Gas Constant = 62.36 L mmHg K−1 mol−1
T = Temperature = 30 C = 303K

(135mmHg*0.73799999999999999 L ) = n (62.36L mmHg K−1 mol−1 *303K)

n = 5.27*10^-3 mol

Option A is correct