Question

128.3 grams of methane (CH4) is equal to how many moles of methane

Answer 1

About 8.0 moles of methane.Number of moles = MassMolar mass.

And thus we get the quotient:

128.3⋅g16.04⋅g⋅mol−1=8.0⋅moles of methane.

Note that the expression is dimensionally consistent, we wanted an answer in moles, and the quotients gives, 1mol−1=11mol=mol as required.

Answer 2

Answer : The moles of methane are, 8.01875 moles

Explanation : Given,

Mass of $CH_4$ = 128.3 g

Molar mass of $CH_4$ = 16 g/mole

Now we have to calculate the moles of methane.

Formula used :

$\text{Moles of }CH_4=\frac{\text{Mass of }CH_4}{\text{Molar mass of }CH_4}$

Now put all the given values in this formula, we get the moles of methane.

$\text{Moles of }CH_4=\frac{128.3g}{16g/mole}=8.01875moles$

Therefore, the moles of methane are, 8.01875 moles