Calculate mass of sodium which contains same number of atoms as are present in `4 g` of calcium (Atomic weight `Na = 23`, atomic weight `Ca = 40`)

Calculate the mass of sodium which contains the same number of atoms as are present in 10 g of magnesium.

Calculate the mass of sodium which contains same number of atoms as are present in 15 g of calcium (at. mass of Ca = 40, Na = 23).

Complete the calculation. Show working for complete credit : Calculate the mass of calcium that will contain the same number of atoms as are present in 3.2 gm of sulphur. [Atomic masses : S = 32, Ca = 40]

What weight of calcium the same number of atoms as are present in 3.2g of sulphur ?

What weight of CO_(2) will contain same number of oxygen atoms as are present in 3.6 g of water ?

Calculate the weight of CO having the same number of oxygen atoms as are present in 22 g of CO2 .