Chemistry 9701 · AS & A Level · Atoms, molecules and stoichiometry

Atoms, molecules and stoichiometry — practice question

A $4.00\,\text{g}$ portion of an anhydrous Group 2 metal nitrate is heated strongly until its mass no longer changes. This leaves a solid residue with a mass of $1.37\,\text{g}$. Which metal is present?

Abarium
Bcalcium
Cmagnesium
Dstrontium

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