Question

Ratio by mass of ca(OH)2

Answer 1

Answer:

Note that both the molar masses of O2- and H+ must be multiplied by 2 before summing up the total molar mass for the molecule Ca(OH)2. In summation, the overall calculation is

40 g/mol + 2 x 16 g/mol + 2 x 1 g/mol

= 74 g/mol.