Chemical Reactions Review

The products of a chemical reaction are on the

• Left side (Products → Reactants)

• Right side (Reactants → Products)

Tags

NGSS.HS-PS1-7

The reactants of a reaction are on the

• Left side (Reactants → Products)

• Right side (Products → Reactants)

Tags

NGSS.MS-PS1-5

The law of conservation of mass states that

• The mass of a system (reaction) increases from beginning to end

• The mass of a system (reaction) stays the same from beginning to end

• The mass of a system (reaction) decreases from beginning to end

Tags

NGSS.HS-PS1-7

Is this equation balanced? 
(Are there the same amount of H and O atoms on both sides of the equation?)

   $H_2O_2\rightarrow\ H_2O\ +\ O_2$  

• Yes

• No

Tags

NGSS.HS-PS1-7

Chemical reactions happen when

• Liquids evaporate

• Bonds break or form

• Chemicals get heated

• Bonds get stretched

Tags

NGSS.HS-PS1-7

The process in which one or more substances are changed into new substances with different chemical and physical properties is called a _____

• chemical equation

• chemical reaction

• stoichiometry

• physical change

If a chemical substance has been dissolved in water, what symbol would be used to represent the solution?

• (s)

• (g)

• (l)

• (aq)

Choose the correct coefficients that balance the following equation.

Ca + N₂ --->Ca₃N₂

• 1,3,3

• 2,3,1

• 3,1,1

• 4,1,3

Tags

NGSS.HS-PS1-7

What are the original substances in a chemical reaction called?

• solutions

• reactants

• products

• polyatomic ions

What type of reaction is occuring?

2 FeCl₃ --> 2 Fe + 3 Cl₂

• synthesis

• decomposition

• single replacement

• double replacement