Question

A student measured 266 mL of 0.260 M HCl solution into a beaker. How many moles of HCI were in the beaker? n(HCI) = ___ mol​

Answer 1

To calculate the number of moles of HCl in the solution, we can use the formula:

moles = concentration x volume

where concentration is in units of moles per liter (M), and volume is in units of liters (L).

Converting the given volume to liters:

266 mL = 266/1000 L = 0.266 L

Substituting the given values into the formula:

moles = 0.260 M x 0.266 L

moles = 0.06896 mol

Therefore, the number of moles of HCl in the solution is 0.06896 mol (rounded to five significant figures).