HMH Unit 4 Chemical Processes and Equations

Front

What is a chemical reaction?

Back

A chemical reaction is a process in which one or more substances change into another substance that is different from the original substances.

Front

What does the arrow in a chemical equation represent?

Back

The arrow in a chemical equation means 'yields', indicating the products formed from the reactants.

Front

In the compound H₂SO₄, how many oxygen atoms are present compared to hydrogen atoms?

Back

There are twice as many oxygen atoms (4) as hydrogen atoms (2) in H₂SO₄.

Front

What information can be determined from the chemical formula C₆H₁₂O₆?

Back

The number of atoms of each element in a glucose molecule.

Front

Is the reaction 2H₂ + O₂ → H₂O balanced?

Back

No, it is not balanced.

Front

What are reactants in a chemical equation?

Back

Reactants are the starting substances that undergo a chemical change.

Front

What are products in a chemical equation?

Back

Products are the substances formed as a result of a chemical reaction.

Front

What does it mean for a chemical equation to be balanced?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation.

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.

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved.