Mole ConceptHard
Question
Common salt obtained from sea - water contains 96% NaCl by mass. The approximate number of molecules of NaCl present in 10.0 g of the common salt is : (At. wt. Na = 23)
Options
A.1021
B.1022
C.1023
D.1024
Solution
Mass of NaCl = 10 × 0.96 = 9.6 gm
moles of NaCl =
no. of molecules =
× 6.023 × 1023 ≃ 1023
moles of NaCl =
no. of molecules =
× 6.023 × 1023 ≃ 1023 Create a free account to view solution
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