Question

9. If the valency of copper is +2 and that of phosphate ion is -3, work out the formula of copper p
Ammonia, sulphur dioxide, methane and ethanol
8. Calculate the molar mass of H2SO. Given that atomic mass of H = 1 u, S = 32 u and 0 = 16 u.
10. How many water molecules are present in 3.6 g of water?
11. Calculate the mass of 1.505 x 10-3 molecules of oxygen gas. (Atomic mass of O = 16 )
12. How many moles are present in 18 g of glucose (CH 20.92 (Atomic mass of C = 12 u, H = 1 u and
. Fill in the blanks
1. Law of constant proportion was given by
2. According to law of
of mass, the total mass of the products is equal to the total i
reactants in a physical or a chemical change.
3. A positively charged ion is called
and a negatively charge ion is called
4. The mass of
molecules of a substance is called its molar mass.
5. The formula of a compound containing Alt and so ions is
The number formuler les rice in one mole of a substance is calle​

Answer 1

The number formuler les rice in one mole of a substance is calle