Question

fórmula centesimal H2O

Answer 1

h= 1x2= 2 gramas
o= 16x1= 16 gramas
h2o= 2 gramas +1 grama= 18 gramas


h= 2x100/18= 11,11%
0=16x100/18= 88,89%

Answer 2

Massas molares

H=1g/mol

O=16g/mol

Massa do composto

2×1+16=18g/mol

$\%H:=\dfrac{2}{18}\times100\approx11,11\%$

$\%O=\dfrac{16}{18}\times100\approx88,88\%$

Fórmula centesimal:$H_{11,11\%}O_{88,88\%}$