Q 108 Number of gm of oxygen in 32 2 g Na2SO4 10H2O is (a) 20 8 (b) 22 - Science - Acids Bases and Salts

Question

Q 108 Number of gm of oxygen in 32 2 g N a 2 S O 4 10 H 2 O is
(a) 20 8
(b) 22 4
(c) 2 24
(d) 2 08

Komal Shivnani · Accepted Answer

Dear student,
The total number of oxygen atoms in this compound is =4+10=14
The total number of moles of O2 in this compound is =nx14
The molecular mass of Na2SO4 10H2O=322g/mol
Thus, moles=32 2/322=0 1 moles
Moles of oxygen =0 1x14=1 4 moles
So, weight of oxygen will be = 16x1 4=22 4gm
The correct answer is (b)
Regards

Q.108. Number of gm of oxygen in 32.2 g N a 2 S O 4 . 10 H 2 O is (a) 20.8 (b) 22.4 (c) 2.24 (d) 2.08

Q.108. Number of gm of oxygen in 32.2 g $N a_{2} S O_{4} . 10 H_{2} O$ is
(a) 20.8
(b) 22.4
(c) 2.24
(d) 2.08