Question

calculate the molecular mass of the following compound and find the cation in it.(a) Ca(OH)2 (b)Na2Co3
(c) Nacl. plz plz ​

Answer 1

Ca(OH)2

Molecular mass of calcium + 2 × Molar mass of oxygen + 2×molar mass of hydrogen

⇒ 40 + 2 × 16 + 2 × 1

⇒ 40 + 32 + 2

⇒ 74g/mol

Na2CO3:

2 × Molar mass of Na + Molar mass of carbon + 3×molar mass of oxygen

⇒ 2 × 23 + 12 + 3 × 16

⇒ 46 + 12 + 48

⇒ 106g/mol

Mm=22.9g/mol+35.4g/mol

=58.44277