2 Answers

Eric Burdo · Answer 1 · 2020-11-10T02:57:34+0000

Answer:

percent composition

Step-by-step explanation:

the percentage composition had to be mnow in order to work out empirical formula

Lazyguy · Answer 2 · 2020-11-14T00:35:34+0000

Answer: percent composition

Step-by-step explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.

To calculate the molecular formula we need to know the molecular weight which can be calculated when percent composition is known.

$n=\frac{\text{Molecular weight}}{\text{Equivalent weight}}$

The molecular formula will be=
$n* {\text{Equivalent weight}}$

Thus percent composition must be known about a compound to find the molecular formula from the empirical formula.

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