How many moles of HCl are in 45mL of 0.3 M HCl

Question

General chemistry homework... college level

Answer 1

Molarity is moles per liter. So you set up an equation:

 

0.3M = x moles / 0.045L <--- You have a 0.3M solution equals an unknown number, x, moles divided by the 0.045L (45mL) of solution

 

Solve for x:

x = 0.3M * 0.045L = 0.0135 mol