Calculate the mass in grams of the following.

Question

1. mass in g of C2 in 10g of C2H2
2. mass in g of N in 20g of HNO3
3. mass in g of O3 in 8g of CaCO3
4. mass in g of O4 in 15g of H2SO4

Answer 1

1. C2H2 has a molar mass of 26.04 g/mol
So, the mass of C2 in 10g of C2H2 = (2/26.04) * 10 = 0.769 g

2. HNO3 has a molar mass of 63.01 g/mol
So, the mass of N in 20g of HNO3 = (14/63.01) * 20 = 4.42 g

3. CaCO3 has a molar mass of 100.09 g/mol
So, the mass of O3 in 8g of CaCO3 = (3*16/100.09) * 8 = 3.83 g

4. H2SO4 has a molar mass of 98.09 g/mol
So, the mass of O4 in 15g of H2SO4 = (4*16/98.09) * 15 = 9.78 g