Respuesta :
moles = 15.5 g / 40 g/mol = 0.3875 mol
M = 0.3875 mol / 0.250 L = 1.55M
M = 0.3875 mol / 0.250 L = 1.55M
Answer : The molarity is 1.55 M
Explanation :
Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.
Formula used :
[tex]\text{Molarity}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}[/tex]
or,
[tex]\text{Molarity}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in L)}}[/tex]
In this question the solute is, sodium hydroxide.
Now put all the given values in this formula, we get:
[tex]\text{Molarity}=\frac{15.5g\times 1000}{40g/mole\times 250.0L}[/tex]
[tex]\text{Molarity}=1.55mole/L=1.55M[/tex]
Therefore, the molarity is 1.55 M
