- #1
teggenspiller
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Homework Statement
. A nitrogen in the container (molar mass is 28 g/mol) has a pressure of 2.5 atm, a volume of 0.2 m3, and a temperature of 300C. What is the mass of the nitrogen?
A. 125 g
B. 258 g
C. 421 g
D. 582 g
E. 864 g
Homework Equations
I'll show you EXACTLY what i am doing:
The Attempt at a Solution
so first i must find moles, since moles times molar mass = the mass. (is that correct??)
so n(moles)= PV/RT (
P=2.5 atm = 101325*2.5= 253312.5
V= .2 m^3
R= 0.0821 a constant
T= 300C = 573.15K
so 253312.5 * .2 / 0.0821 * 573.15 = moles
= 50662.5/ 47.1
=1075.63 = moles
the molar mass is 28g/mol
so 1075.63 * 28 grams=
30117.6
not an answer.
i have no idea what i am doing wrong, this whole class is finished today. i really need some help and an idea of what exactly i am doing wrong.