Some amount of water is evaporated from a 2.0 L, 0.2 M NaI solution, to from a 1.0 L solution. The molar mass of NaI is 150 g/mol.

What is the final concentration of NaI solution in?

A. 30 g/L
B. 15 g/L
C. 60 g/L
D. 45 g/L

5 answers

half the volume of solution with the same amount of NaI means the concentration is doubled

there are 0.4 moles of NaI in the liter of solution

sooo D?

150 g/mole * 0.4 moles/L = ? g/L

My guess it 60 g / L

*it's