Question

mass in gram of 2.74 moles of KMnO4

Answer 1

Answer:

Molecular weight of KMnO4 is [39+55+(16×4)], which is equal to 158grams

158grams of KMnO4 contains 55grams of Potassium. (atomic weight of Potassium is 55grams)

40grams of KMnO4 contains 15855∗40, which is almost equal to 14grams of Potassium

Now,

55grams of Potassium equals to 1mole of Potassium

1gram of Potassium equals to 551mole of Potassium

Thus, 14grams of Potassium equals to 551∗14mole of Potassium, which is almost equal to 0.25mole of Potassium