Question

Trisha and her lab partner filled a beaker with 150 milliliters of a 0.10 M HCl solution. How many moles of HCl are in the beaker? Remember, molarity = moles liter .

Answer 1

M=mol/liter
We know that we have 150ml=.15 L and .1 mol of HCl
Rearranging the molarity equation, we get
mol=M*l
mol=(.15)(.1)
=.015 mol

Answer 2

Moles of HCl is 0.015.

Step-by-step explanation:

Molarity of HCl = 0.10 M

Volume of HCl = 150 mL

Conversion factor for mL to L is,

`1\ mL = 10^(-3)\ L`

So, 150 mL = 0.15 L

Molarity is given by,

`Molarity=(Moles)/(Volume\ in\ L) \\Moles = Molarity * Volume\ in\ L`

Substitute values in the above formula

`Moles = 0.10 * 0.15\\=0.015\ mol`

Moles of HCl is 0.015.