Question

How many liters of 4 m solution can be made using 100 grams of lithium bromide?

Answer 1

HEY MATE HERE IS YOUR ANSWER:-

Explanation:

The first thing that you need to do here is to convert the mass of lithium bromide to moles by using the compound's molar mass.

100.0

g

⋅

1 mole LiBr

86.845

g

=

1.1515 moles LiBr

Now, the molarity of the solution is simply a measure of the number of moles of solute, which in your case is lithium bromide, present for every  

1.00 L

of the solution.

In order to have a  

4.00-M

solution of lithium bromide, you need to have  

4.00

moles of lithium bromide for every  

1.00 L

of this solution.

You know that your sample contains  

1.1515

moles of lithium bromide, so you can use the molarity of the solution as a conversion factor to determine how many liters of this solution can be made.

1.1515

moles LiBr

⋅

1.00 L solution

4.00

moles LiBr

=

0.288 L solution

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