Answer:
474 grams
Step-by-step explanation:
1 moles KMnO4 = 158 grams
3 moles KMnO4 = 158 * 3 = 474 grams
K = 39
Mn = 55
O = 16
O4 = 16 * 4 = 64
39+55+64 = 158
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