Final answer:
To find the number of moles of Na2CO3 in a 25.0 mL solution of 3.25 M Na2CO3, you multiply the molarity by the volume in liters, which gives you 0.08125 moles of Na2CO3.
Step-by-step explanation:
To calculate how many moles of Na2CO3 are in 25.0 mL of a 3.25 M solution, you can use the formula:
moles = molarity (M) × volume (L)
First, convert 25.0 mL to liters since molarity is moles per liter (L):
25.0 mL = 0.0250 L
Then calculate the number of moles:
moles of Na2CO3 = 3.25 M × 0.0250 L = 0.08125 moles