# Question bb229

Jul 25, 2017

Approx. $75 \cdot g$.

#### Explanation:

We use the quotient.....$\text{Concentration"="Moles of solute (mol)"/"Volume of solution (L)"=("Mass of solute"/"Molar mass of solute")/"Volume of solution}$, and clearly it has the units required units of $m o l \cdot {L}^{-} 1$.

And thus..................

$\text{concentration"xx"volume"xx"molar mass of solute"="mass of solute}$. With me?

"Mass of solute"=0.50*mol*L^-1xx2*Lxx74.55*g*mol^-1=??*g#.

Should you be able to do this as mental arithmetic?