PS Sem 1 Final Part Three

Front

What is combustion?

Back

A chemical reaction that occurs in the presence of oxygen, producing heat and light, typically involving the burning of a fuel.

Front

What does oxidation refer to in modern chemistry?

Back

Any reaction where electrons are lost.

Front

In the reaction N2 + 3H2 → 2NH3, how many moles of hydrogen are used?

Back

3 moles of hydrogen.

Front

What does concentration describe?

Back

The actual amount of solute for a given amount of solution.

Front

Which types of solutions conduct electricity?

Back

Both acidic and basic solutions.

Front

What is the definition of a solute?

Back

A substance that is dissolved in a solution.

Front

What is a solvent?

Back

The substance in which the solute is dissolved, typically present in a greater amount.

Front

What is the principle of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.

Front

What is a chemical reaction?

Back

A process that leads to the transformation of one set of chemical substances to another.

Front

What is the difference between an endothermic and exothermic reaction?

Back

Endothermic reactions absorb heat, while exothermic reactions release heat.