PLEASE HELP ME 1. What is the molality of a solution made up of 43.6 mol of CaCl2 dissolved by 13.5 kg of water?

2. How many moles of Na2CO3 are required to create 9.54 liters of a 3.4 M solution?

3. Which of these actions can result in decreasing the molarity of a solution?

Select all that apply.

A

adding solute

B

adding solvent

C

removing solute

D

removing solvent

Thanks Y'all:)

1. 3.23 m

2. 32.4

3. B  adding solvent  and C  removing solute

Explanation:

1. Molality of a solution is defined as the number of moles of solute dissolved per kg of the solvent

where,

n = moles of solute

= weight of solvent

Now put all the given values in the formula of molality, we get

2. Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

where,

n = moles of solute

= volume of solution in L

Therefore, the moles of is 32.4

3. Molarity can be decreased by decreasing the moles of solute and by increasing the volume of solution.

Thus adding solvent  and removing solute will decrease the molarity.

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