Question

chemical changes
anthony is performing an experiment. he adds 0.25 grams of baking soda to 5 grams of water and stirs. anthony watches as the baking soda dissolves in the water. if anthony weighs the water and baking soda solution, what kind of change is this?
none of the matter was
or
the boat and the ball are made of the same piece of clay. choose the best explanation as to why one sinks and the other doesnt.

Explanation:

Step1: Recall law of conservation of mass

In a chemical or physical - change, the total mass of the substances before and after the change remains the same. When baking soda (sodium bicarbonate) dissolves in water, it is a physical change.

Step2: Calculate total initial mass

The initial mass of water is 5 grams and the mass of baking soda is 0.25 grams. So the total initial mass $m_{initial}=5 + 0.25=5.25$ grams.

Step3: Determine final mass

Since mass is conserved in this physical - change (dissolving), the mass of the solution will be equal to the total initial mass of the water and baking soda. So the mass of the solution is 5.25 grams.

Answer:

5.25 grams