Question

Calculate the molecular mass of the following compounds.
1. NaCl (at mass of Na=23;Cl=35.5)
2. MgO (Mg=24; O=16)
3. CaCO3 (Ca=40,C=12, O=16)
4. NaOH (H=1)
5. H2O (H=1, O=16)​

Answer 1

Answer:

(3) 40+12+16*3=100 is the answer

(5) 18

(4) 40

Answer 2

Answer:

1. 23+35.5 = 58.5u

2. 24 + 16 = 40u

3. 40 + 12 + 16×3 = 52 + 48 = 100u

4. 23 + 16 + 1= 40u

5. 1×2 + 16 = 2 +16 = 18u