480 cm3 of an unknown gas at S.T.P. weigh 0.643 g. Calculate the molar mass of the gas.
Answers
Answered by
0
Answer:
Rearrange the ideal gas law equation to isolate
n
. Plug in the known values and solve.
n
=
P
V
R
T
n
=
100
kPa
×
1.35
L
8.31446
L
kPa
K
−
1
mol
−
1
×
273.15
K
=
0.0594 mol
(rounded to three significant figures)
To calculate the molar mass of the gas, divide its given mass in grams by the calculated number of moles.
molar mass
=
3.50 g
0.0594 mol
=
58.9 g/mol
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Answer:
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