Final answer:
The molarity of a solution with 0.450 mol of NaS in 1.75 L of solution is calculated using the formula M = moles of solute / liters of solution, yielding a molarity of 0.2571 M.
Step-by-step explanation:
To calculate the molarity of a NaS solution, you need to know the number of moles of solute (NaS) and the volume of the solution in liters. The formula for molarity (M) is:
M = moles of solute / liters of solution
We have been given 0.450 mol of NaS dissolved in 1.75 L of solution. Applying the formula:
M = 0.450 mol / 1.75 L
M = 0.2571 M NaS (rounded to four significant figures)
The solution's molarity is 0.2571 M.