Unit 7 Review - Chemical Equations

(0601) What is the part of the chemical equation in green called?

Fe + S --> FeS

• products

• reactants

• yield

• chemical formula

(0601) Which of the following would be considered a product of this reaction?

• Potassium bromide

• Silver (I) nitrate

• Potassium nitrate

• Potassium silveride

(0606) In the molecule below, which of the following choices is a subscript? (Select all that apply)

• 3

• 2

• 4

• SO

(0606) What is the total number of atoms present in 5Na₃PO₄

• 5

• 40

• 55

• 8

Tags

NGSS.MS-PS1-1

(0302) A __________ involves a change in state, like melting, freezing, or boiling.

• Chemical reaction

• Physical change

Tags

NGSS.MS-PS1-4

(0302) A teacher is demonstrating physical and chemical changes to her class. Which action should she use to demonstrate a chemical change?

• cutting a piece of paper

• folding a piece of paper

• tearing a piece of paper

• burning a piece of paper

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

(0302) Which of the following is NOT a clue that a chemical reaction has taken place?

• Release of a gas

• Formation of a precipitate

• Mixing the reactants

• Color change

Tags

NGSS.MS-PS1-2

(0301) A chemical change results in…

• the spacing of particles increasing.

• changing the shape of the substance.

• atoms rearranging their bonds.

• particles moving faster.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

(0301) Which statement is true about the image shown?

• Reaction A is a physical change and Reaction B is a chemical change.

• Reaction A is a chemical change and Reaction B is a physical change.

• Both Reaction A and Reaction B are chemical changes.

• Both Reaction A and Reaction B are physical changes.

Tags

NGSS.MS-PS1-2

(0301) If the appearance or shape of an substance changes but the chemical properties of a substance remain unchanged, it is a...

• Chemical Change

• Physical Change

• Both a physical and chemical change.

• Neither a physical or chemical change.