Question

how many moles of NAOH are needed to dissolve in water to make 4 liters of a 2.0M solution?​

Answer 1

Answer:

8

$moarity = \frac{number \: of \: moes}{voume \: of \: solution \: in \: litres}$

So

$number \: of \: moles = molarity \times volume$

$number \: of \: moles = 2 \times 4 = 8$

Answer 2

8 moles moles of NAOH are needed to dissolve in water to make 4 liters of a 2.0M solution.

Given:

Volume of NaOH Solution = 4 lt

Molarity = 2M

To Find:

Moles of NaOH

Solution:

We Know That,

Molarity = no. of moles/volume in liters

=> no. of moles = Molarity x volume

=> no. of moles = 2x4 = 8

Hence, number of moles of NAOH are needed to dissolve in water to make 4 liters of a 2.0M solution is 8.

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