What are three common clues that chemical change has occurred?

Answer 1

precipitate forms, color change, heat and light is given off, gas is formed usually hydrogen or co2

Answer 2

Some clues to tell if the change is chemical:

• the object would change color,
• the new substance isn't reversible (it doesnt turn back to what it was before),
• there's gas formation

Answer 3

• Atoms are rearranged into different molecules. There will be a new chemical formula.

• Changes are not reversible without another reaction.

• Energy is often produced (fire or heat for example)

Answer 4

It might be emitting smoke, it could be fizzing or bubbling, the color could have changed or the substances have burned. There's 4 for you. Come up with some on your own, too. It will improve your knowledge on how the world works.

Answer 5

Changes in color, temperature changes (heat absorbed/released), and changes in chemical reactivity are all indicative of a chemical change.

Answer 6

There are possibilities. Here are three common ones.

1. color change

2. change in temperature (can be warmer or colder)

3. formation of a precipitate

Answer 7

FOUR clues that a chemical change has occurred are a temperature change, formation of gas (usually CO2), formation of precipitate (solid), and a color change.

Answer 8

change in color

change in temperature

gas released