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\( a^{b}\)

\( a_{b}^{c}\)

\({a_{b}}^{c}\)

\(a_{b}\)

\(\sqrt{a}\)

\(\sqrt[b]{a}\)

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\(\cfrac{a}{b}\)

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Percentage by mass of M = 20.22%

Percentage by mass of Cl = ?

100 - 20.22 = 79.78%

Mass given ration of M

M = 2022/27 = 0.75

Chlorine = 79.78/35.5 = 2.24

Divide by the smallest

M = 0.75/0.75 = 1

Cl = 2.24/0.75 = 3

∴ The formula = MCl

_{3}