Question

22. Write down the number of atoms in
d) Mg(OH)
c) Caco,
a) CO
b) H0​

Answer 1

Answer:

1. Mg(OH)2 has 1 atom of Mg, 2 atoms of O, and 2 atoms of H.
2. One molecule of calcuim carbonate contains 5 atoms. Hence, 0. 1 mole of calcium carbonate will contain 0. 5NA atoms.
3. The molecular formula of the compound carbon dioxide is CO2. One molecule of carbon dioxide consists of 1 atom of carbon and 2 atoms of oxygen. We can calculate the mass of one molecule of carbon dioxide by adding together the masses of 1 atom of carbon and 2 atoms of oxygen.