Compounds and mixtures

Question 1

Iron and sulfur are …

Answer 1

elements

Question 2

If you mix iron and sulfur what did you make?

Answer 2

A mixture

Question 3

If you heat a mixture of iron and sulfur over a flame, you will get a …

Answer 3

chemical reaction

Question 4

Once you have mixed iron and sulfur over a flame you now have a …

Answer 4

Compound

Question 5

If you heat up a mixture of iron and sulfur, what compound does it make?

Answer 5

iron sulfide

Question 6

What is the symbol for the compound iron sulfide?

Answer 6

FeS

Question 7

If two parts hydrogen and one part oxygen are mixed in a sealed bottle, then a spark is made inside the bottle, what happens

Answer 7

An explosion

Question 8

What do two parts hydrogen and 1 part oxygen make after it explodes?

Answer 8

Water

Question 9

If a direct current is passed through water what happens?

Answer 9

It breaks it down into two elements hydrogen and oxygen

Question 10

What is the symbol for the empirical formula of water?

Answer 10

H2O