Answer:
1. Option(1) 3
2. Option (2) 1/2
Explanation:
1. We'll begin by obtaining the molar mass of H3PO4. This is illustrated below:
Molar Mass of H3PO4 = (3x1) + 31 + (16x4) = 3 + 31 + 64 = 98g/mol
Mass of H in H3PO4 = 3x1 = 3g
The percentage by mass of H in H3PO4 given by:
Mass of H in H3PO4/Molar Mass of H3PO4 x 100
=> 3/98 x 100
=> 3
2. Atoms present in H3PO4 are given below:
H = 3 atoms
P = 1 atom
O = 4 atoms
Total = 8 atoms
The fraction of oxygen atom in H3PO4 is given by:
=> Atom of O/total atoms
=> 4/8
=> 1/2
