Chemical Reaction Quiz

What is a reactant?

• The chemical substances that begin the reaction.
• What comes from the reaction.

What is a yield?

• The arrow in an equation that represents the chemical reaction.
• The beginning substances.

What is a coefficient?

• The small number on the right of the chemical symbol.
• The large number to the left of a formula.

Tags

NGSS.MS-PS1-5

What is a product?

• What's left of the chemical reaction.
• The beginning formulas.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Decomposition occurs when...

• Two formulas combine.
• A formula breaks apart.
• An atom is replaced during a reaction.

A synthesis occurs when...

• Two formulas combine.
• A formula breaks apart.
• An atom is replaced during a reaction.

Why must chemical equations be balanced?

• So that the equation doesn't explode

• The reaction won't happen until it is balanced

• Based on the Law of Conservation of Matter, matter cannot be created or destroyed.

• Based on the Law of Conservation of Energy, energy cannot be created or destroyed.e

Tags

NGSS.MS-PS1-5

What must go in the blank space to balance the equation?

4Fe + ____O₂ --> 2Fe₂O₃

• 1

• 2

• 3

• 4

A reaction that gives off heat to its surroundings is...

• exothermic
• endothermic
• endergonic
• none of these

Tags

NGSS.HS-PS1-4

Which type of reaction will feel cold?

• exothermic
• exergonic
• endothermic
• none of these

Tags

NGSS.MS-PS1-4