How many moles of potassium chromate were in 15 mL of K2CrO4?

To determine the number of moles of potassium chromate (K2CrO4) in 15 mL of K2CrO4, we need to use the formula:

Moles = Volume (in liters) x Molarity

First, we need to know the molarity of the K2CrO4 solution. The molarity (M) is defined as the number of moles of solute dissolved per liter of solution. If you have the molarity, you can go ahead and calculate the number of moles directly.

If the molarity is not given, we need additional information to calculate it. One way to find the molarity is by knowing the mass of the solute (in grams) and the volume of the solution (in liters). However, in this case, you have provided the volume but not the concentration or mass of potassium chromate.

Therefore, without additional information, it is not possible to determine the number of moles of potassium chromate in 15 mL of K2CrO4.