What is the Concentration of 5.6 of grams of mg (OH)2 dissolves in 550ml

Answer 1

find the moles
... divide 5.6 by molar mass

divide moles by volume (usually in liters)

Answer 2

Please what is volume of a 0.100 mole per litre solution that contain 5.0 grams of Nacl

Answer 3

Molarity=moles/liters
.1mole=5.8grams NaCl in a liter
so volume= 1liter*5/5.8