What mass of koh is needed to make 300.0 ml of 0.725 m koh? what mass of koh is needed to make 300.0 ml of 0.725 m koh? 86.4 g 30.5 g 23.3 g 12.2 g?

The given values in the problem are:

.725 M is moles per liter

300 mL =.300 L

The solution is:

56.1 g/mol in 300 ml = 56.1g/mol in. 3L

M = (x gram/56.1) /.3L

.725 = (x gram/56.1) /.3L

Multiply both sides by. 3

.2175 = x grams/56.1

x = 12.20 g