Chemical Reactions

Chemistry is

• a property of a substance that can be observed without changing into another substance

• The study of matter and how it changes

• anything that has mass and takes up space

• a rapid reaction between oxygen and a substance called a fuel

Tags

NGSS.MS-PS1-1

What type of reaction is FeS + 2 HCl2  $\rightarrow$  FeCl2 + H2S

• a synthesis reaction

• a decomposition reaction

• a single replacement reaction

• a double replacement reaction

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which of the following is NOT a correct inference that you can make about the burning of gasoline?

• Chemical bonds are broken and others are formed

• The reaction is a physical change

• New substances are produced

• Energy is released

Tags

NGSS.HS-PS1-4

A chemical equation that shows the same number of each kind of atom on both sides of the equation is said to be

• balanced

• unbalanced

• an incomplete reaction

• a replacement reaction

Tags

NGSS.MS-PS1-5

Anything that has mass and takes up space is considered

• matter

• energy

• chemistry

• endothermic

Tags

NGSS.MS-PS1-5

What happens when chemical bonds break and new bonds form?

• a physical change

• a chemical reaction

• matter is destroyed

• surface area increases

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

CaCO3 represents a chemical

• symbol

• formula

• subscript

• reaction

The only sure evidence for a chemical reaction is

• the formation of gas

• color change

• the production of one or more new substances

• change in properties

Tags

NGSS.MS-PS1-2

A shorter, easier way to show chemical reactions, using symbols instead of words, is called a

• chemical equation

• chemical formula

• symbol

• subscript

The substances listed on the left side of a chemical equation are the

• products

• coeficients

• precipitates

• reactants

Tags

NGSS.MS-PS1-1