Sapling Learning Calculate the percent composition by mass o

Sapling Learning Calculate the percent composition by mass of each element in Al(OH Use at least three significant figures. Number Number Number Previous Chec Hint about us careers privacy poiley ter

Solution

Molar mass of Al = 27

Molar mass of O = 16

Molar mass of H = 1

Molar mass of Al(OH)3 = 27 + 3*(16 + 1) = 78

% Al = mass of Al*100/mass of Al(OH)3

= 27*100/78

= 34.616%

% O = 3*[mass of O*100/mass of Al(OH)3]

= 3*(16*100/78) = 61.538%

% H = 3*[mass of H*100/mass of Al(OH)3]

= 3*(1*100/78) = 3.846%