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Calculate Mass Percent of Hydrogen in Methyl Acetate
On the calculation of the mass fraction of hydrogen in methyl acetate
Now I want to calculate the mass fraction of hydrogen in methyl acetate. Methyl acetate, its chemical formula is\ (C_ {3} H_ {6} O_ {2}\).
To find the mass fraction of an element in a compound, there is a formula: the mass fraction of an element\ (=\ frac {the relative atomic mass of the element\ times the number of atoms} {the relative molecular mass of the compound}\ times100\%\).
First find the relative molecular mass of methyl acetate. The relative atomic mass of carbon is about\ (12\), the relative atomic mass of hydrogen is about\ (1\), and the relative atomic mass of oxygen is about\ (16\). Then the relative molecular mass of methyl acetate\ (M = 12\ times3 + 1\ times6 + 16\ times2\)
\ (= 36 + 6 + 32\)
\ (= 74\).
The number of hydrogen atoms is\ (6\), and the relative atomic mass of hydrogen is\ (1\), then the mass fraction of hydrogen is\ (w (H) =\ frac {1\ times6} {74}\ times100\% =\ frac {6} {74}\ times100\%\ approx8.1 \%\) 。
In summary, the mass fraction of hydrogen in methyl acetate is about\ (8.1\%\).
Now I want to calculate the mass fraction of hydrogen in methyl acetate. Methyl acetate, its chemical formula is\ (C_ {3} H_ {6} O_ {2}\).
To find the mass fraction of an element in a compound, there is a formula: the mass fraction of an element\ (=\ frac {the relative atomic mass of the element\ times the number of atoms} {the relative molecular mass of the compound}\ times100\%\).
First find the relative molecular mass of methyl acetate. The relative atomic mass of carbon is about\ (12\), the relative atomic mass of hydrogen is about\ (1\), and the relative atomic mass of oxygen is about\ (16\). Then the relative molecular mass of methyl acetate\ (M = 12\ times3 + 1\ times6 + 16\ times2\)
\ (= 36 + 6 + 32\)
\ (= 74\).
The number of hydrogen atoms is\ (6\), and the relative atomic mass of hydrogen is\ (1\), then the mass fraction of hydrogen is\ (w (H) =\ frac {1\ times6} {74}\ times100\% =\ frac {6} {74}\ times100\%\ approx8.1 \%\) 。
In summary, the mass fraction of hydrogen in methyl acetate is about\ (8.1\%\).
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