f the density of a substance is equal to 2.5 g/mL and its mass is equal to 19 g, what is the volume of the substance?
Use the units to help you
ml/g * g cancels down to ml (the g cancel out)
2.5g/ml is equivalent to 1ml/2.5g
therefore
1ml/2.5g * 19g will give you the answer (in ml)
+118653 
