Question

How many grams of solute are present in 385 mL of 0.640 M KBr? mass of solute:

Answer 1

Concentration of KBr=0.640 L Volume of the solution=385 mL x= 1000 ml = 0.385L Number of moles of KBr = 0.385L 0.640 L =0.246 mole Molar mass of the KBr = 119. 0 8 mole Mass of the KBr = 0.246 molex 119. 0 8 mole = 29.3 g)