calculate the mass percent of the following solutions 1.25 g CaCL2 in 35.0 g H2O

I am not sure if i have the correct set up

(1.25g CaCl2/1.25 g CaCl2 + 35.0 g H20)*100

That's right.

% = (mass solute/total mass)*100 = ?

To calculate the mass percent of a solution, you need to divide the mass of the solute (CaCl2) by the total mass of the solution and then multiply by 100.

The total mass of the solution is the sum of the mass of the solute (CaCl2) and the mass of the solvent (H2O). In this case, the mass of CaCl2 is given as 1.25 g and the mass of H2O is given as 35.0 g.

To set up the calculation correctly, you need to divide the mass of CaCl2 (1.25 g) by the sum of the mass of CaCl2 (1.25 g) and the mass of H2O (35.0 g). Then, multiply the result by 100.

So, the correct setup would be:
(1.25 g CaCl2 / (1.25 g CaCl2 + 35.0 g H2O)) * 100

Now, let's calculate the mass percent:

(1.25 g / (1.25 g + 35.0 g)) * 100

(1.25 g / 36.25 g) * 100

0.03448 * 100

3.448%

Therefore, the mass percent of the CaCl2 solution is approximately 3.448%.