Question

What is the percentage composition of each element in dinitrogen monoxide, N2O?

Answer 1

The correct answer is C :)

Answer 2

Answer: The correct answer is Option c.

Explanation:

To calculate the percentage composition of an element in a compound, we use the formula:

$\text{Mass percent of element}=\frac{\text{Mass of element in compound}}{\text{Mass of the compound}}\times 100$

We are given:

Molar mass of $N_2O$ = 44.013 g/mol

Mass of nitrogen in compound = $[2\times 14.0067]=28.0134g/mol$

Mass of oxygen in compound = 15.999 g/mol

By putting and calculating the mass percentages of nitrogen and oxygen, we get:

$\text{Mass percent of nitrogen}=\frac{28.0134g/mol}{44.013g/mol}\times 100=63.64\%$

$\text{Mass percent of oxygen}=\frac{15.999g/mol}{44.013g/mol}\times 100=36.36\%$

Hence, the correct answer is Option c.