Respuesta :
Answer: the mass is 80g
Explanation: In a solution of 140g, we knot that there are 60g of vinegar, the only other component in the solution is baking soda.
Now we want to find the mass of the baking soda in the solution.
Because there are only two components in the solution, if we remove the 60g of vinegar, the residue mass is the mass of the baking soda.
then we need to calculate:
Mass = 140g - 60g = 80g
So the mass of baking soda in the solution is 80g.