Which equation has both a liquid and a gas as products?
Answer
A
Mg times s plus 2 HCl aq rightarrow cap h sub 2 of g plus MgCl sub 2 times aq
B
2 KClO sub 3 s rightarrow 2 KCl s plus 3 cap o sub 2 g
C
2 Mg s plus cap o sub 2 times g rightarrow 2 MgO s
D
2 HgO s rightarrow 2 Hg l plus cap o sub 2 times g
Explanation
In choice D, the products are 2 Hg(l) and O₂(g): Hg(l) is liquid mercury, and O₂(g) is oxygen gas. Therefore, this equation has both a liquid and a gas as products.
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