Final answer:
To find the number of moles of solute in a 0.75 L solution with a molarity of 89 M, multiply the volume by the molarity, yielding 66.75 moles of solute.
Step-by-step explanation:
To determine how many moles of solute are present in a given solution, you can use the molarity formula:
moles of solute = Molarity (mol/L) x Volume of solution (L)
Given that the molarity (M) of the solution is 89 M, which means 89 moles of solute per liter of solution, and you have a 0.75 L solution, the calculation is straightforward:
moles of solute = 89 mol/L x 0.75 L
moles of solute = 66.75 mol
Therefore, there are 66.75 moles of solute in 0.75 liters of an 89 M solution.