Chem Sem 1 Final Review - Units 1 &2

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. Examples include air, salad, and saltwater.

Front

What side of a chemical equation represents the reactants?

Back

The left side of a chemical equation represents the reactants, which are the substances that undergo a chemical change.

Front

Convert 1000 grams to kilograms.

Back

1000 grams = 1 kilogram.

Front

What happens to the temperature in an exothermic reaction?

Back

In an exothermic reaction, the temperature increases as heat is released.

Front

What does the term 'element' refer to in chemistry?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen, oxygen, and gold.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. Examples include water (H2O) and carbon dioxide (CO2).

Front

What is the difference between a mixture and a compound?

Back

A mixture is a physical combination of substances that retain their individual properties, while a compound is a chemical combination that results in new properties.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it is conserved.

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs heat from its surroundings, resulting in a decrease in temperature.

Front

What is the significance of the yields sign (→) in a chemical equation?

Back

The yields sign indicates the direction of the reaction, showing that reactants are transformed into products.