Chemistry Unit test

Front

What is air classified as?

Back

Air is a mixture because its composition varies.

Front

What does the law of conservation of mass state in a chemical reaction?

Back

The mass of the reactants equals the mass of the products.

Front

What happens to carbon dioxide in the atmosphere?

Back

Carbon dioxide is used by plants in photosynthesis.

Front

How do protons and neutrons differ in charge?

Back

Protons have a positive charge, while neutrons have no charge.

Front

What is octane (C8H18) classified as?

Back

It is a pure substance containing properties different from those of hydrogen and carbon.

Front

What is a pure substance?

Back

A material with a constant composition and consistent properties throughout.

Front

What is a mixture?

Back

A combination of two or more substances where each retains its own properties.

Front

What role do plants play in the carbon cycle?

Back

Plants use carbon dioxide in photosynthesis to produce oxygen and glucose.

Front

What is the chemical formula for carbon dioxide?

Back

CO2.

Front

What is the charge of a proton?

Back

Positive.