Question

Calculate the molecular masses of:NaCl , CuSO4 , H2CO3 and H2O (atomic masses are given above)​

Answer 1

Answer:

1. NaCl: 58.5
2. NaCl: 58.5CuSO4: 160
3. NaCl: 58.5CuSO4: 160H2CO3: 62
4. NaCl: 58.5CuSO4: 160H2CO3: 62H2O: 18

Explanation:

Approximate Atomic Masses of:

Na is 23.

Cl is 35.5.

Cu is 64.

S is 32.

O is 16.

H is 1.

C is 12.

Now it would be easy to find the Molecular Masses:

NaCl:

(23) + (35.5) = 58.5

CuSO4:

(64) + (32) + (16x4) = (64) + (32) + (64) = 160

H2CO3:

(1x2) + (12) + (16x3) = (2) + (12) + (48) = 62

H2O:

(1x2) + (16) = (2) + (16) = 18

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