Question

find the mass percentage composition of methane (CH4)​

Answer 1

Answer:

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Answer 2

Answer:

The mass percentage of carbon in methane is 75% and that of hydrogen is 25%

Explanation:

As we know that the mass percent composition describes the relative quantities of elements in a chemical compound.

• Mass percent is also known as percent by weight. It is abbreviated as w/w%.

• For a solution, mass percent equals the mass of an element in one mole of the compound is divided by the molar mass of the compound, multiplied by 100

$Mass percent =(\frac{mass of solute in 1 mole of compound}{molar mass of the compound} ) *100$

Molar mass is defined as the mass of a substance for a given amount.

As we all know the molar mass of carbon is 12 and hydrogen is 1

So, the  total molar mass of the compound methane $(CH_4)$ is,  

                               $m=12+ (1*4)=16$

$Mass percent composition =( \frac{Mass of solute}{molar mass of the compound}) *100$

Mass percentage of carbon = $(\frac{12}{16} )*100$ =75%

Mass percentage of Hydrogen = $(\frac{4}{16} ) *100$ =25%

The mass percentage of carbon in methane is 75% and hydrogen is 25%