Question

calculate the moles mass of the following substances :- 1).water (h2o) 2).HNO3 (nitric acid ) 3).Hcl(hydro chloric acid ) 4).C2H2 (ETHYNE)
​

Answer 1

Explanation:

2) Molar mass of nitric acid, HNO3 = 1 + 14 + 3 x 16 = 63 g

3) Molar mass of hydrochloric acid, HCl = 1 + 35.5 = 36.5 g

4) Molar mass of ethyne, C2H2 = 2 x 12 + 2 x 1 = 26 g

Answer 2

Molar mass of H2O=[(2*1)+1*(16)]g=(2+16)g=18g

Molar mass of HNO3=[(1*1)+(1*14)+(3*16)]g=(1+14+48)g=

63g

Molar mass of hcl=[(1*1)+(1*35.5)g]=(1+35.5)g=36.5g

Molar mass of C2H2(Ethyne)=[(2*12)+(2*1)]=(24+2)g=26g