Classify each of the following as an element, compound or mixture.
a) Ammonia, NH3
b) Gold bar
c) Orange juice
d) Wine
e) Saline solution

Which of the following is an example of a homogeneous mixture?

Which of the following best describes beach sand in terms of the classification of matter?

Consider the following data obtained by decomposing samples of carbon dioxide, CO₂, into its component elements.

Mass of CO₂ and Components

Sample	Mass CO2	Mass C	Mass O2
1	44.00 g	12.00 g	32.00 g
2	22.00 g	6.00 g	16.00 g
3	88.00 g	24.00 g	64.00 g

Which of the following statements is consistent with this data?

Atoms __________ .

Which of the following is an example of a pure substance?