Answer:
Explanation:
Reactants
BaSO4 has 4 oxygens and only 1 sulfur. That's a good thing to notice.
H2SO4 has 4 oxygens and only 1 sulfur.
The reactants have 4 + 4 oxygens = 8 oxygens.
Products
It is right, but you might struggle a bit with the answer.
Notice that HSO4 is in brackets followed by a two
(HSO4)2
When the 2 is outside the brackets, everything inside the brackets get's doubled.
There are 2 Hs
There are 2 Ss
There are 4 * 2 Oxygens = 8 oxygens, some as the reactants.
