Which of the following is an example of a chemical change?
25 points
A. water evaporating
B. carbon joining with oxygen to form carbon dioxide
C. ice cream melting
D. salt dissolving into the water to form a solution
2 answers
I need help
A chemical change is one in which the substance CHANGES into another substance. Wavter evaporating still is water. Salt dissolving is still NaCl. Ice cream melting still is ice cream, although it's a liquid now instead of a frozen solid. C joining with oxygen to form carbon dioxide is a chemical change. You're starting with C and end up with something different, namely, carbon dioxide. C initiall and CO2 at the end is an entirely different substance.
1 answer