Chemistry: What is the empirical formula of a compound composed of 3.25% hydrogen (h), 19.36% carbon (c), and 77.39% oxygen (o) by mass?

What is the empirical formula of a compound composed

exoticbunnylover123

09.01.2022

CH_2O_3

Explanation:

Taking a calculation basis of 100 grams, you have:

$m_{H}=3.25 g$

$m_{C}=19.36 g$

$m_{O}=77.39 g$

Dividing by their atomic weights:

$n_{H}=\frac{3.25 g}{1g}=3.25$

$n_{C}=\frac{19.36 g}{12g}=1.61$

$n_{O}=\fracc{77.39 g}{16g}=4.83$

Dividing by the smallest:

$n_{H}=\frac{3.25}{1.61}=2$

$n_{C}=\frac{1.61}{1.61}=1$

$n_{O}=\fracc{4.83}{1.61}=3$

The empirical formula will be:

CH_2O_3

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