In a compound containing Si and O, 3.25 g of the compound contains 1.25 g of Si, and the remainder is O. In another sample of a compound of Si and O, 2.45 g of the compound contains 1.62 g of Si, and the rest is O. Calculate the percentage composition of each compound.
Answers
Given info : In a compound containing Si and O, 3.25 g of the compound contains 1.25 g of Si, and the remainder is O. In another sample of a compound of Si and O, 2.45 g of the compound contains 1.62 g of Si, and the rest is O.
To find : The percentage composition of each compound is...
solution : In a compound containing Si and O, 3.25 g of the compound contains 1.25 g of Si, and the remainder is O.
mass of Si = 1.25 g
mass of O = mass of compound - mass of Si
= 3.25 - 1.25 = 2.00g
now percentage composition of Si = 1.25/3.25 × 100
= 125/3.25 = 38.46 %
percentage composition of O = 100 % - 38.46 % = 61.54 %
In another sample of a compound of Si and O, 2.45 g of the compound contains 1.62 g of Si, and the rest is O.
mass of Si = 1.62 g
mass of O = mass of compound - mass of Si
= 2.45 - 1.62 = 0.83 g
now percentage composition of Si = 1.62/2.45 × 100
= 162/2.45 = 66.1225 %
percentage composition of O = 100 % - 66.1225 %
= 33.8775 %