What percentage of the total mass of the compound #KAl_2S_2O_3# is due to the sulfur in the compound?
1 Answer
Jan 27, 2018
The sulfur accounts for 31.3 % of the mass of the compound.
Explanation:
You must determine two values:
-
The molar mass of the compound - for
#KAl_2S_2O_3# this is 39.1 + (2 x 27.0) + (2 x 32.1) + (3 x 16.0) = 205.3 g -
The mass of the requested element in this formula. In this case, each formula unit contains two sulfur atoms, so the mass is 64.2 g
Divide 2 by 1:
