Question

Sulfur trioxide gas combines with water to form a single product.
SO
+ H
O → ?
Based on the law of conservation of mass, which option is the product of the reaction?
(1 point)
3
2
H
S
O
2
2
4
H
SO
2
4
H
SO
2
3
HSO
4
A)
Lead

Answer 1

SO3 + H2O → H2SO4

Reason: Counting atoms — S:1, O:3+1=4, H:2 — matches H2SO4 (sulfuric acid). The equation is already balanced and obeys conservation of mass.