Question

Number 12Have some knowledge on how to do this but not much.

Answer 1

Step-by-step explanation

12. Given equation:

`Mg+2HCl\rightarrow H_2+MgCl_2`

From the Periodic Table; the Molar mass of H = 1.01 g, Mg = 24.31 g, Cl = 35.45 g

Therefore, the molar masses of all substances involved are:

Mg = 24.31 g

2HCl = 2(1.01 + 35.45)g = 2 x 36.46 g = 72.92 g

H₂ = 2 x 1.01 g = 2.02 g

MgCl₂ = 24.31 g + 2(35.45) = 24.31 g + 70.90 g = 95.21 g