Answer:
Mass of NaOH = 2.4 grams
Explanation:
[tex]M\:=\:\frac{n}{v}[/tex]
where,
[tex]n=moles\:of\:solute[/tex]
[tex]v=liters\:of\:solution[/tex]
Remember: [tex]\quad 1000\:cm^3=1\:L[/tex]
[tex]\Rightarrow \quad 300\:cm^3=0.3\:L[/tex]
[tex]n=\frac{m}{40\:g/mol}[/tex]
Putting the values, we have:
[tex]0.2=\frac{m}{40\:g/mol}\times \frac{1}{0.3}[/tex]
[tex]\Rightarrow m=2.4\:g[/tex]
Best Regards!
