Question

If the molarity of an hydrous sodium triox carbonate is 2.5M calculate the Mass of salt that dissolve 10cm^3 of water

Answer 1

$Molarity= \frac{Moles}{Volume}$

Moles $=\frac{2.5×10}{1000}=0.025moles$

$Moles=\frac{mass}{molar-mass}$

Mass $=251.936×0.025=6.3grams$