Answer:
The answer is 4.22g
Explanation:
To calculate the mass of Mg in the sample we must find the molar mass of Mg divide it by the molar mass of the sample and multiply it by the total mass of the sample
Molar mass (M) of Mg = 24g/mol
M of Mg (OH)2 = 24 + 2( 16 + 1)
= 24 + 34
= 58g/mol
Mass of Mg in Mg (OH)2 is
[tex] \frac{24}{58} \times 10.2g \\ = 4.22g[/tex]
Hope this helps you.
