Chemical Reactions, Matter and Energy

Is the following equation balanced or unbalanced?
Fe + S --> FeS

• balanced

• unbalanced

Tags

NGSS.MS-PS1-5

In reactions, products must be equal to..

• Products

• Reactants

• Starters

• Enders

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

a solute whose water solution conducts electricity is called a(n)

• nonconductor

• electrolyte

• nonelectrolyte

• aqueous solution

What is a solute?

• The substance that does the dissolving in a solution.

• The substance that is dissolved into the solution.

• The mixing of different substances.

• The process in which neutral molecules lose or gain electrons

Which of the following describes a precipitate?

• a liquid forms when a block of metal is heated

• a solid forms when one liquid is poured into another

• a gas forms when a solid is placed in a liquid

• bubbles form when an acid is poured on a rock

Tags

NGSS.MS-PS1-2

The thing that does the dissolving

• Solute

• Solvent

• Colloid

• Solution

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

• Product

• Reactant

• Starters

• Enders

Tags

NGSS.MS-PS1-5

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

• rusting of a bicycle

• painting a house

• washing a dog

• tearing up a newspaper

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which one shows that a chemical reaction has occurred?

• dissolving

• melting

• formation of a gas

• bending

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What type of change occurs when a new substance is formed that has different properties from the original substances?

• chemical change

• nuclear change

• physical change

• mutation

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5