Question

How many no. of gram atoms in 3.2gm of calcium is present?

Answer 1

The mass in grams of Cr2O3 formed at the same time. [ atomic ... I) calculate the mass of calcium that will contain the same number of atom as are present in 3.2 gm of sulphur.

Answer 2

Weight of 1 mol calcium = molar mass of calcium = 32 g

32 g = 1 mol

3.2 g = 0.1 mol

1 mol has 6.022*10^23 atoms

0.1 mol will have 6.022*10^22 atoms