Question

5- A solid mass of 35 g is mixed with 85 g of a solution. A chemical reaction 1 point

takes place and a gas is produced. The final mass of the mixture is 105 g.
What is the mass of the gas released?

Answer 1

The mass of the gas released is 15 g. I added 35 with 85. Then I subtracted that amount by 105 and got 15 g :)