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Explanation:

1. C. It can explode and burn in the presence of oxygen would be a chemical property of hydrogen.

2. A chemical property of propane is its combustibility. This can warm up houses and be used in a grill to cook food.

3. 1) Physical, because this is a phase change.

2) Physical because the properties of the gold isn't changed.

3) Chemical, the bubbles show us that a chemical reaction is happening.

4) Chemical, rust is an example of a chemical change in the iron.

5) Physical, the copper does not chemically change, it only bends.

4. a) Brass is a homogenous mixture because it combines copper and zinc.

b) Air is a homogenous mixture because it mixes multiple elements

c) Table sugar, or sucrose, is a compound because it’s formed when two or more elements are joined together.

d) Because its composition is not uniform throughout, orange juice is a heterogeneous mixture.

e) Tin can be found on the periodic table therefore it is an element.

5. It strips the hair and makes it brittle

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