Chemical Reactions

Front

A substance that is formed as the result of a chemical reaction is a __________________

Back

Product

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Which of the following is an example of a chemical change?

• water freezes to form ice
• sugar dissolves in water
• gasoline burns in a car engine
• a piece of metal expands when it is heated

Back

gasoline burns in a car engine

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Which one shows that a chemical reaction has occurred? Options: dissolving, melting, formation of a gas, bending

Back

formation of a gas

Tags

NGSS.MS-PS1-2

Front

What does the Law of Conservation of Mass state?

Back

Matter cannot be gained or lost in a chemical reaction.

Tags

NGSS.MS-PS1-5

Front

What is the left part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

Back

Reactants

Tags

NGSS.MS-PS1-1

Front

How many atoms of carbon (C) are in C₆H₁₂O₆?

Back

6

Tags

NGSS.MS-PS1-1

Front

How many elements are in C₆H₁₂O₆?

Back

3

Tags

NGSS.MS-PS1-1

Front

Is the following equation balanced?
Al + O₂ --> 2Al₂O₃

Back

No!

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Which of the following reactions is balanced? Options: 2CH₄ + O₂ -> CO₂ + H₂O, CH₄ + 2O₂ -> CO₂ + H₂O, CH₄ + 2O₂ -> CO₂ + 2H₂O, None of the chemical equations are balanced.

Back

CH₄ + 2O₂ -> CO₂ + 2H₂O

Tags

NGSS.MS-PS1-5

Front

a chemical reaction that releases energy by light or heat

Back

Exothermic Reaction

Tags

NGSS.MS-PS1-4