Question

Calculate the moles of methanol in 5 litres of its 2m solution

Answer 1

Answer : The moles of methanol is, 10 mole

Explanation : Given,

Molarity of solution = 2 mole/L

Volume of solution = 5 L

Molarity : It is defined as the number of moles of solute present in one liter of solution.

Formula used :

$Molarity=\frac{\text{Moles of solute}}{\text{volume of solution in L}}$

Now put all the given values in this formula, we get the moles of methanol.

$2mole/L=\frac{\text{Moles of solute}}{5L}$

$\text{Moles of solute}=10mole$

Therefore, the moles of methanol is, 10 mole

Answer 2

Answer:

10 moles of methanol are present.

Explanation:

Molarity : It is defined as the number of moles of solute present in one liter of solution.  Mathematically written as:

$Molarity=\frac{\text{Moles of solute}}{\text{volume of solution in L}}$

Moles of methanol = n

Volume of the solution = 5 L

Molarity of the solution = 2M

$2M=\frac{n}{5L}$

n  = 2M × 5L = 10 moles

10 moles of methanol are present.