Question

20.6g NaBr is dissolved in 500ml solution whar is the Molarity of resulting solution?

Answer 1

molar mass of NaBr = 103 gm
no. of moles = 20.6/103 = 0.2 mole

M = no. of moles of solute/volume of solution
$molarity = 0.2 \div 500 = 0.4m$