ANSWER
The mass of MgCl2 is 0.4 grams
EXPLANATION
Given that;
The volume of the solution is 10ml
The concentration of the solution is 4%
Follow the steps below to find the number of mass in grams of MgCl2
Since the volume of the solution is 10ml
The weight/volume of the solution is 4%
[tex]\text{ \% concentration = }\frac{weight\text{ }}{\text{ volume}}[/tex]
Where the volume is 10ml
[tex]\begin{gathered} \text{ }\frac{4}{\text{ 100}}\text{ = }\frac{\text{ weight}}{\text{ 10}} \\ \text{ 0.04 = }\frac{\text{ weight }}{10} \\ \text{ cross multiply} \\ \text{ weight = 0.04 }\times\text{ 10} \\ \text{ weight = 0.4 grams} \end{gathered}[/tex]Therefore, the mass of MgCl2 is 0.4 grams
