How many liters of a 18.0M stock solution of NaCl are needed to make 2.0L of a 2.5M solution? Your
•54L
•28L
•22.5L
•14.4L

0.28 L

Explanation:

From the question given above, the following data were obtained:

Molarity of stock solution (M₁) = 18 M

Volume of diluted solution (V₂) = 2 L

Molarity of diluted solution (M₂) = 2.5 M

Volume of stock solution needed (V₁) =?

The volume of the stock solution needed can be obtained as follow:

M₁V₁ = M₂V₂

18 × V₁ = 2.5 × 2

18 × V₁ = 5

Divide both side by 18

V₁ = 5 / 18

V₁ = 0.28 L

Thus, the volume of the stock solution needed is 0.28 L

um i think it might be a car?

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.