Question

SOMEONE, PLEASE HELP ME ON THIS ONE!

MORE IMPORTANT THAN THE OTHER QUESTION

FORMULA: % Hydration =molar mass of water(g) / molar mass of compound
*100

Answer 1

`\% \:\mathrm{hydration}\:` in green vitriol
`= 45.32\%`

Step-by-step explanation:

Atomic mass of Fe = 56 g/mol

Atomic mass of S = 32 g/mol

Atomic mass of O = 4 g/mol

Atomic mass of H = 1 g/mol

Molar Mass of
`FeSO_4.7H_2O = 56 + 32 + 4 * 16 + 7(2*1+16)= 278 g/mol`

Molar Mass of
`7H_2O = 7( 2*1 + 16) =126 g/mol`

% hydration
`= (126/278) * 100`

`= 45.32\%`