Module 2

Question 1

The law of mass conservation

Answer 1

Matter cannot be created or destroyed it can only change forms.

Question 2

Element

Answer 2

Any substance that cannot be broken down (decomposed) into simpler components.Compounds-Substances that can be decomposed into elements by chemical means.

Question 3

The law of definite proportions

Answer 3

The proportion of elements in any compound is always the same.

Question 4

The law of multiple proportions

Answer 4

If 2 elements combine to form different compounds, the ratio of masses of the second element that react with a fixed mass of the first element will be a simple, whole-number ratio.

Question 5

Pure substance

Answer 5

A substance that contains only one element or compound.

Question 6

Mixture

Answer 6

A substance that contains different compounds and/or elements.

Question 7

Homogeneous mixture

Answer 7

A mixture with a composition that is always the same no matter what part of the sample is observed.

Question 8

Heterogeneous mixture

Answer 8

A mixture with a composition that is different depending on what part of the sample is observed.