Final answer:
To calculate the moles of hydrochloric acid in a solution, convert the volume from milliliters to liters and multiply by the molarity. For 500 mL of a 0.300 M HCl solution, there are 0.150 moles of HCl.
Step-by-step explanation:
To find out how many moles of hydrochloric acid (HCl) are in 500 mL of a 0.300 M solution, you can use the formula:
Moles of HCl = Molarity (M) × Volume (L)
First, you need to convert the volume from milliliters to liters since molarity is expressed as moles per liter. 500 mL is equivalent to 0.500 L as there are 1000 milliliters in a liter.
Then, you simply multiply the molarity of the HCl solution by the volume in liters:
Moles of HCl = 0.300 moles/L × 0.500 L
Moles of HCl = 0.150 moles
This calculation indicates that there are 0.150 moles of HCl in 500 mL of a 0.300 M solution.