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Sagot :
Answer:
51.4 L
Step-by-step explanation:
You want to know the number of liters of 35 g/mL solution Samantha needs to equal the amount of solute in 100 liters of 18 g/mL solution.
Formula
Using the given formula, we have ...
[tex]C_1V_1=C_2V_2\\\\V_2=\dfrac{C_1V_1}{C_2}=\dfrac{(18\text{ g/mL})(100\text{ L)}}{35\text{ g/mL}}=\dfrac{1800}{35}\text{ L}\\\\V_2\approx51.4\text{ L}[/tex]
Samantha needs about 51.4 liters of 35 g/mL solution.
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Additional comment
You may note that we mixed the volume units, using mL in the expression for concentration, and L in the expression for quantity. We could have converted L to mL (or vice versa), but that is unnecessary here. The units of concentration cancel in the expression for volume, so there is no need for them to be anything other than what they are.
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