Question

There are 4 g of NaOH in solution. The relative molecular mass of NaOH is 40. How many moles of NaOH are in the solution?

Answer 1

To find the number of moles of NaOH in 4 g of solution, divide the mass by the molar mass (40.00 g/mol). The result is 0.1 moles of NaOH.

Step-by-step explanation:

To calculate how many moles are in 4 g of NaOH, we use the molar mass of NaOH, which is 40.00 g/mol. The number of moles of a substance is equal to the mass of the substance divided by its molar mass. Therefore:

Number of moles = Mass of NaOH / Molar mass of NaOH

Number of moles = 4 g / 40.00 g/mol

Number of moles = 0.1 mol

There are 0.1 moles of NaOH in the solution.