Chemical Reactions and Natural Resources

The reactants are the final substances in a reaction.

• true

• false

Energy cannot be created nor destroyed in a reaction

• true

• false

Synthetic products are made by humans as a result of a chemical reaction.

• true

• false

It takes energy to break bonds, and energy is released when bonds are formed

• true

• false

The coefficient in a formula tells the number of atoms of each element present

• true

• false

All compounds can be molecules, but not all molecules are compounds

• true

• false

It’s a common misconception that all synthetic products are bad for you

• true

• false

What are the tiny particles that make up matter?

• atoms

• electricity

• gravity

• forces

In the chemical reaction CH₄ + 2O₂ → CO₂ + 2H₂O, there are reactants and products. If you count the atoms in the reactants, there are

• 4 carbon atoms, 4 hydrogen atoms, and 2 oxygen atoms

• 1 carbon atom, 4 hydrogen atoms, and 2 oxygen atoms

• 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms

• 4 carbon atoms, 4 hydrogen atoms, and 4 oxygen atoms

Temperature of a substance increases as ______________

• The substances volume increases

• The particles within the substance increase motion

• The substance mass increases

• The substance expands