Asteel tank with a volume of 9.583 l contains n2 gas under a pressure of 4.972 atm at 31.8 °c. calculate the number of moles of n2 in the tank.
a.
0.002 mol
c.
0.525 mol
b.
0.018 mol
d.
1.90 mol

The correct answer is d. 1.90 mol

Explanation:

We convert the unit of temperature to celsius into Kelvin, then use the ideal gas formula, solve for n (number of moles) and use the gas constant R =0.082 l atm / K mol:

0°C=273K  31,8°C= 273 + 31,8= 304,8K

PV=nRT ---> n=PV/RT

n=4,972 atm x 9,583 L/0.082 l atm / K mol x 304,8K

n=1,90 mol

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i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a