Molecular mass of any molecule is sum of atomic mass of different atoms present in it, like molecular mass of H2O (atomic mass of hydrogen and oxygen is 1 & 16 respectivly) is 18. Calculate the molecular mass of given molecules
H3PO4
NaNO3
CaSO4
ZnCl2
NH4Br
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the molecular weight of the phosphoric acid is as follows. 3 (H) + (P) + 4(O) = 3 (1) + 31 + 4(16) = 3 + 31 + 64 = 98. - So, the molecular weight or molar mass of the phosphoric acid is 98.
The atomic masses of Na, N and O are 23, 14 and 16 g/mol respectively.
Molar mass of NaNO3
= 23+14+3(16)=23+14+48=85g
The atomic mass of Ca = 40.08
The atomic mass of S = 32.06
The atomic mass of O = 16
CaSO4 = 40.08 + 32.06 + 16 × 4 = 136.14
Therefore, the molecular mass of CaSO4 is 136.14 g/mol.
Zinc chloride
=136.286 g/mol
Ammonium bromide
97.94 g/mol
Explanation:
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