Stoichiometry #2 (Pictures and particle diagrams)

If making a cheese sandwich is represented by the following "equation": 2 Bd + Ch --> Bd₂Ch

what you expect a sandwich to look like?

• A

• B

• C

• D

If making a cheese sandwich is represented by the following "equation": Bd₂ + 2 Ch --> 2 BdCh

what you expect a sandwich to look like?

• A

• B

• C

• D

Tags

NGSS.MS-ETS1-1

If making a cheese sandwich is represented by the following "equation": 2 Bd + Ch --> Bd₂Ch

what does the red 2 on the left side of the equation represent?

• A

• B

• C

Tags

NGSS.HS-PS1-7

If making a cheese sandwich is represented by the following "equation": Bd₂ + 2 Ch --> 2 BdCh

what does the red 2 on the left side of the equation represent?

• A

• B

• C

A menu at the Chemistry Cafe describes a sandwich as 3 pieces of bread, one meat and 2 slices of cheese. What would you expect a name of the sandwich to be?

• A

• B

• C

A sandwich on the menu at the Chemistry Cafe is called BdM₂Ch. What would you expect this sandwich to have?

• A

• B

• C

Tags

NGSS.MS-PS1-1

Hydrogen gas and nitrogen gas react in a synthesis reaction to form ammonia (NH₃). If the 'before' box represents the reactants, which box correctly represents the contents after the reaction is complete? (Hint: first write a balanced eqn.)

• A

• B

• C

• D

• E

Sulfur (S) reacts with oxygen gas to form sulfur trioxide. (Write a balanced equation). Which box would be correct for the end of the reaction, given the quantities of reactants in the 'before' box?

• A

• B

• C

• D

• E

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-2

The diagram shown represents the reaction of red A with blue B. Write a balanced equation for this reaction.

• 8 A + 4 B₂ --> 4 A₂B₂

• 2 A + 2 B₂ --> 4 A₂B₂

• 2 A + B₂ --> A₂B₂

• 2 A + B₂ --> 2 A₂B₂

Tags

NGSS.HS-PS1-7

The reaction represented in the boxes is the combustion of methane (CH₄) in oxygen. Red = oxygen, black = carbon and white = hydrogen. Write a balanced equation. What is the limiting reactant in the picture shown?

• methane (CH₄)

• oxygen (O₂)

• carbon dioxide (CO₂)

• water (H₂O)

Tags

NGSS.HS-PS1-7