Answer:
KMnO4
Step-by-step explanation:
For a compound of 100g
K has 24.74% or 24.74 g
=> 24.74/39.10 = 0.63
Mn has 34.76% or 34.76g
=> 34.76/54.95 = 0.63
O has 40.50% or 40.50g
=> 40.50/16 = 2.53
So K:Mn:O = 0.63:0.63:2.53
If divided by 0.63 => 1:1:4
Then the empirical formula is KMnO4