1.5×[tex]10^{-4}[/tex] is the molarity of a salt solution that contains 0.90 grams of NaCl in a 100.0 ml solution.
A mole is defined as 6.02214076 × [tex]10^{23}[/tex] of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
Molality = \frac{Moles \;solute}{Volume \;of \;solution \;in \;litre}
Given :
Mass =0.90 grams
Volume =100.0 ml
Moles of NaCl = [tex]\frac{0.90 }{58.44 }[/tex]
0.01540041068
Putting the value in the equation:
Molality =[tex]\frac{0.015}{100.0 ml }[/tex]
1.5×[tex]10^{-4}[/tex]
Hence, 1.5×[tex]10^{-4}[/tex]is the molarity of a salt solution that contains 0.90 grams of NaCl in a 100.0 ml solution.
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