How many grams of na2co3 are present in 11.8 ml of a solution that is 22.0% na2co3 by mass? the density of the solution is 1.10 g/ml.

The Answer is 2,86 grs Na2CO3

Explanation:

What we have to do is find the mass of Na2CO3 as a pure component or solute. That's because the 11,8 mL are a solution of Na2CO3. This means, the sum between the solute Na2CO3 and water. To find the grams of Na2CO3 as pure component we create a factor series as is shown in the attached file.

Data:

Density of solution (ρ) = 1,10 grs sln Na2CO3/mL sln Na2CO3

Mass Percentage (%) = 22 grs Na2CO3/100 grs sln Na2CO3  

The procedure is explained in the attached file

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )