Final answer:
To find the number of moles of HCl in 75 mL of a 0.340 M HCl solution, convert the volume to liters and multiply by the molarity. The calculation results in 0.0255 moles of HCl.
Step-by-step explanation:
To calculate the number of moles of HCl in 75 mL of a 0.340 M HCl solution, first convert the volume from milliliters to liters, because molarity is typically expressed in moles per liter (mol/L). There are 1000 milliliters in a liter, so 75 mL is equivalent to 0.075 liters. Next, use the formula:
Moles = Molarity × Volume
Substitute the given values into the formula to get the number of moles:
0.340 mol/L × 0.075 L = 0.0255 mol
Therefore, there are 0.0255 moles of HCl in 75 mL of a 0.340 M HCl solution.