Přejít k hlavnímu obsahu

Sign up for FREE

Law of Conservation of Mass Video

Poslední aktualizace 2 months ago

6 Dotazy

Question 1

01:26

1

Question 2

01:39

1

Question 3

02:09

1

Question 4

02:40

1

Question 5

04:22

1

Question 6

04:34

1

Otázka 1

1.

If a closed system starts with 6 carbon atoms, how many carbon atoms will there be after a chemical reaction?

3

6

12

60

Otázka 2

2.

What is stored in the bonds between atoms?

Water

Energy

Sunlight

Properties

Otázka 3

3.

What happens to the number of atoms of any element after a chemical reaction?

It increases.

It decreases.

It stays the same.

Otázka 4

4.

The amount of matter and energy at the beginning of a chemical reaction is ________________ the amount of matter and energy at the end.

More than

The same as

Less than

Otázka 6

6.

Put the sentence in the correct order.
reactants a equal and reaction. products always in are The chemical