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SAT® Subject Test in Chemistry

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Limiting Reactant Oxidation of Mg

SATCHM-L3VNVP

$$2Mg + O_2→ 2MgO$$

Use the equation above to answer the following question.

If 0.486g of magnesium and $6.022 × 10^{20}$ molecules of oxygen react, what mass of magnesium oxide will be formed?

A

$0.646 \ g$

B

$0.806 \ g$

C

$0.0004 \ g$

D

$0.08 \ g$

E

$0.024 \ g$