Solid calcium reacts with excess oxygen according to 2 Ca(s) + O2(g) → 2 CaO(s)

CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance

Problem

Solid calcium reacts with excess oxygen according to 2 Ca(s) + O2(g) → 2 CaO(s). If 4.00 g of Ca completely reacts, what mass of CaO is formed? (a)

4.00\text{ g}

(b)

5.60\text{ g}

(c)

2.80\text{ g}

(d)

11.2\text{ g}