Volume of molecule oxygen

cstout

1. The problem statement, all variables and given/known data
A mass of 0.736 kg of molecular oxygen is contained in a cylinder at a pressure of 1.0 × 105 Pa and a temperature of 1°C. What volume does the gas occupy?


2. Relevant equations

PV=nRT

V=nRT/P

3. The attempt at a solution


n=(.736)(1000)/16 = 46


V = (46)(8.31)(274.15)/(1x10^5)

where n = 46
R = 8.31 J/K/mol
T = 274.15k
P = 1x10^5

but that is not the correct answer, what am i doing wrong??

Dick

Molecular oxygen is 0_2, two atoms of oxygen per molecule. That makes the molar mass 32g.

cstout

so would i multiply the mass of .736(1000)32 to find the n, or basically i still am unsure of finding the n

Dick

Multiply? You divided before and that was correct. One mole of O2 has mass 32g. So how many moles is .736kg?

cstout

ahh..thanks, i got it now