Question

How many molecules are present in 4.9g of H₂SO₄?

Answer 1

For H₂SO₄ one mole is equal to 98 grams.

Therefore, calculating the number of moles for 4.9 grams

n = 4.9/98 = 0.05 moles

So, for 0.05 moles the number of gram molecules is 0.05-gram molecules.

Hence, the number of gram molecules is 0.05.