Question

Calculate the number of moles 10g of CH4​

Answer 1

molar mass of CH4= 12+4 = 16g

no. og moles = given weight/ molar mass

10/16 =0.625

Answer 2

Answer:

The number of moles of $10g$ of methane ( $CH_{4}$ ), n, calculated is $0.625mol$.

Explanation:

Given data,

The mass of methane ( $CH_{4}$ ), m = $10g$

The number of moles of $10g$ of methane ( $CH_{4}$ ), n =?

As we know,

• The number of moles is the ratio of the mass of the substance ( m ) to the molar mass of the substance ( M ).
• n = $\frac{m}{M}$         -------equation (1)

Firstly, we have to calculate the molar mass of methane ( $CH_{4}$ ):

• The molar mass of methane ( $CH_{4}$ ) = carbon's atomic mass + 4 × hydrogen's atomic mass
• The molar mass of methane ( $CH_{4}$ ) = $12 + (4 \times 1 )$ = $16g/mol$

After substituting the given value of mass and the calculated value of molar mass in equation (1), we get:

• n = $\frac{10}{16}$
• n = $0.625mol$

Hence, the number of moles of $10g$ of methane ( $CH_{4}$ ), n = $0.625mol$.