Question

5 mg nacl per liter is equal to how/many mol mper liter

Answer 1

Answer: $8.54\times 10^{-5}moles/L$

Explanation: To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

For sodium chloride:

Mass of sodium chloride given = 5 mg

= 0.005 g

Molar mass of sodium chloride = 58.5 g/mol

Putting values in above equation, we get:

$\text{Moles of sodium}=\frac{0.005g}{58.5g/mol}=8.54\times 10^{-5}mol$

Thus Moles per liter=$\frac{moles}{liter}=\frac{8.54\times 10^{-5}}{1L}=8.54\times 10^{-5}moles/L$