What is the concentration of a solution containing: a 4 moles in 2 dm of solution?
b 0.3 moles in 200 cm3 of solution?

a. 2 M

b. 1.5 M

Given

a 4 moles in 2 dm of solution?

b 0.3 moles in 200 cm3 of solution

Required

The concentration of a solution

Solution

Molarity shows the number of moles of solute in every 1 liter of solution or mmol in each ml of solution

Can be formulated :

a.

moles(n) = 4

volume(V)=2 L solution

M = 4 : 2 = 2

b.

moles(n)=0.3

volume(V)=200 cm3 = 0.2 L

M = 0.3 : 0.2 = 1.5

the answer is

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