Question

Calculate the mass percent for each O& H in water knowing that total mass of water is 18 g
mass of hydrogen is 2 g
mass of oxygen is 16 g​

Answer 1

Mass percentage =

$\frac{mass \: of \: element}{mass \: of \: the \: compound} \times 100$

$o = \frac{16g}{18g} \times 100 \\ = 88.9\%$

H =

$\frac{2g}{18g} \times 100 \\ = 11.1\%$