Chemistry Review Chapter

A coefficient tells how many equivalents of each compound react in a given reaction.

• true
• false

In a chemical reaction, the products are found on the left side of the arrow.

• true
• false

The arrow in chemical equations means "is equivalent to".

• true
• false

All chemical reactions release energy although some release it in the form of light and others in the form of heat.

• True
• False

Tags

NGSS.HS-PS1-4

Word equations use words to indicate reactants and products of chemical reactions.

• true
• false

Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?

• synthesis
• double replacement
• single replacement
• combustion

Which type of reaction is
SiO₂  + HF --> SiF₄  H₂O

• double replacement
• synthesis
• single replacement
• combustion

How many total atoms are in 3Na₂SO₄?

• 21
• 24
• 18
• 10

In a chemical equation, (aq) after one of the substances means that it is which of these?

• dissolved in water
• released as gas
• produced from nothing
• a solid formed from two ionic substances

Which type of reaction can be recognized by the general pattern A + BX --> AX + B?

• synthesis
• single replacement
• combustion
• decomposition