Question

What volume is needed to make a 4.0 molar solution holding 12 moles of solute? 3.0 liters 48 liters 12 liters 4.0 liters

Answer 1

Hey there ! :

Number of moles ( solute ) = 12 moles

Molarity of solution = 4.0 M

Therefore:

M = n / V

4.0 = 12 / V

V = 12 / 4.0

V = 3.0 liters

Answer A

Answer 2

Answer: Option (a) is the correct answer.

Step-by-step explanation:

Molarity is defined as the number of moles present in a liter of solution.

Mathematically, Molarity =
`\frac{\text{no. of moles}}{volume}`

Since, it is given that molarity is 4.0 molar or 4.0 m/L and no. of moles is 12 moles.

Therefore, calculate volume as follows.

Molarity =
`\frac{\text{no. of moles}}{volume}`

4.0 m/L =
`(12 moles)/(volume)`

volume = 3 L

Hence, we can conclude that volume of the given solution is 3 liters.