Question

480 cm3 of an unknown gas at S.T.P. weigh 0.643 g. Calculate the molar mass of the gas.​

Answer 1

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

Answer 2

Answer:

I don't know answers

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