Question

How many moles of NH3 are in 0.350 L of a 5.00 M aqueous solution? mol

Answer 1

1.75 moles moles of NH3 are in 0.350 L of a 5.00 M aqueous solution.

Explanation:

Data given:

volume of the NH3 solution = 0.35 L

molarity of the aqueous solution having N$H_{3}$ = 5 M

Number of moles = ?

the relation between molarity, volume and number of moles is given by the relation:

molarity = $\frac{number of moles}{volume in litres}$

This equation is rewritten and simplified to get the number of moles is written as:

number of moles = molarity x volume in litres

putting the values in the above relation:

number of moles = 5 x 0.35

number of moles = 1.75

1.75 moles of NH3 are required to make a 5 M solution.