When 0.313 g of Mg is heated strongly in a nitrogen (N2) atmosphere, a chemical reaction occurs. The product of the reaction weighs 0.433 g. Calculate the empirical formula of the compound containing Mg and N. Name the compound.

Question

Chemistry

Fresier

28 March, 17:51

When 0.313 g of Mg is heated strongly in a nitrogen (N2) atmosphere, a chemical reaction occurs. The product of the reaction weighs 0.433 g. Calculate the empirical formula of the compound containing Mg and N. Name the compound.

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Answers (1)

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Guillermo Wilkerson · Answer 1

Mg₃N₂ (magnesium nitride)

Explanation:

M (total) = M (mg) + M (n)

M (n) = M (total) - M (mg)

= 0.433g - 0.313g

= 0.12g

mole (N) = 0.12g / 14.0067 g/mol

= 0.008567

mole Mg = 0.313g / 24.3050 g/mol

= 0.012878

Mg = 0.012878 / 0.008567

= 1.5

N = 0.008567 / 0.008567

= 1

multiply by 2 to get whole numbers

Mg = 1.5 * 2 = 3

N = 1 * 2 = 2

Mg₃N₂ (magnesium nitride)