Which of the following is a reliable way to observe that a chemical change has occurred when two substances come in contact with one another?
test for the release of heat
observe a color change
conduct a test to determine the chemical makeup of the molecules
monitor for the release of a gas
1 answer
All of the options mentioned can be reliable ways to observe that a chemical change has occurred when two substances come in contact with one another. However, it is important to note that the reliability may vary depending on the specific substances being tested.