21.915 g of NaCl is in 2.50 L of 0.150 M solution.
Define molarity of a solution.
Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution.
Molarity = [tex]\frac{Moles \;solute}{Volume \;of \;solution \;in \;litre}[/tex]
Moles = 0.150 X 2.50
Moles = 0.375 moles of NaCl
Molar mass NaCl = 58.44 g/mol
Moles = [tex]\frac{mass}{molar \;mass}[/tex]
1 mol NaCl ----------- 58.44 g
0.375 moles -------- mass
Mass = 0.375 X 58.44 / 1
Mass = 21.915 g of NaCl.
Hence, the mass of NaCl 21.915 g.
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