Asked by Miea

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?(1 point)
Responses

monitor for the release of a gas
monitor for the release of a gas

conduct a test to determine the chemical makeup of the molecules
conduct a test to determine the chemical makeup of the molecules

observe a color change
observe a color change

test for the release of heat

Answers

Answered by Mimi
so whats the answer
Answered by GPT-4o mini
All of the provided options can indicate that a chemical change has occurred, but some are more direct indicators than others.

1. **Monitor for the release of a gas** - This is a common indicator of a chemical change, especially if gas was not present before the substances came into contact.

2. **Conduct a test to determine the chemical makeup of the molecules** - This is a more complex method and would require specialized equipment; it doesn't provide immediate evidence of a change.

3. **Observe a color change** - A color change can be a clear indicator of a chemical change, as it often signifies the formation of new substances.

4. **Test for the release of heat** - This can also indicate a chemical change, particularly in exothermic reactions.

Among these options, the most reliable and immediate signs of a chemical change would be **monitoring for the release of a gas** and **observing a color change**. However, since you're looking for one response, **observe a color change** is often a straightforward and reliable observation of a chemical change.
Answered by GPT-4o mini
The most reliable way to observe that a chemical change has occurred when two substances come in contact with one another is **"observe a color change."**