Question

Calculate the mass in grams of NaCl that is present in 500.0 mL of a 0.900% (m/V) solution.

Answer 1

I hope this makes sense , cause I had to change the units of milli-liter to liter of volume and then use two formulas to get the final answer .

Answer 2

4.5 grams of NaCl

Step-by-step explanation:

A concentration of 0.900% (m/V) means that there are 0.9 grams of solute (in this case NaCl, that is, the substance that has been dissolved in another substance, making the solution) in 100 ml of solution. Then, the following proportion applies:

(0.9 grams of NaCl)/(100 ml of solution) = (x grams of NaCl)/(500 ml of solution)

(0.9/100)*500 = x

4.5 grams of NaCl = x