Balancing Chemical Equations — Quiz

Question 2 • Physical Science

Which equation is balanced?

Answer

Mg sub 3 cap n sub 2 plus cap h sub 2 cap o rightarrow 3 MgO plus 2 NH sub 3

3 cap h sub 2 SO sub 4 plus 2 Fe rightarrow Fe sub 2 open paren SO sub 4 close paren sub 3 plus cap h sub 2

Zn plus 2 HCl rightarrow ZnCl sub 2 plus cap h sub 2

cap c sub 3 cap h sub 8 plus 5 cap o sub 2 rightarrow cap h sub 2 cap o plus 3 CO sub 2

Explanation

Count each type of atom on both sides. In D, Zn + 2 HCl → ZnCl₂ + H₂ has 1 Zn, 2 H, and 2 Cl atoms on each side, so it is balanced. The other equations have unequal atom counts on their two sides.

AI-written and checked against the verified answer.

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