Chemistry Chapter 13-14 Review

What is the correct description of this reaction?

Fe(s) + 2HCl(aq) → FeCl₂(aq) + H₂(g)

• Hydrogen gas reacts with a solution of iron II chloride to produce solid iron metal in a solution of hydrochloric acid.

• Solid iron reacts with a solution of hydrochloric acid to produce a solution of iron II chloride and hydrogen gas.

• Hydrogen gas reacts with solid iron II chloride to produce solid iron metal in a solution of hydrochloric acid.

• A solution of iron metal reacts with solid hydrochloric acid to produce a solution of iron chloride and hydrogen gas.

Which chemical equation correctly depicts the following reaction: solid strontium carbonate is heated to produce solid strontium oxide and carbon dioxide gas?

• SrCO₃(g) → SrO(g) + CO₂(s)

• SrCO₃(s) → SrO₂(s) + CO₂(g)

• SrCO₃(s) → SrO(s) + CO₂(g)

• Sr(CO3)2(s) → SrO(s) + CO2(g)

What would you expect to see if you performed this chemical reaction?

HCl(aq) + AgNO₃(aq) → AgCl(s) + HNO₃(aq)

• solid precipitate forming in a liquid

• no detectable change

• bubbles forming in a liquid

• color change in a liquid

Which term correctly describes the interaction shown by the equation?

2AgNO₃(aq) + Mg(s) → 2Ag(s) + Mg(NO₃)₂(aq)

• a physical change

• a single exchange reaction

• a combination reaction

• a decomposition reaction

CuO(s) → CuO(l) is an example of a _____.

• physical change

• chemical change

• combination reaction

• decomposition reaction

Tags

NGSS.MS-PS1-4

Does the chemical equation below demonstrate the law of conservation of mass?

CH₄(g) + 2O₂(g) → CO₂(g) + 4H₂O(l)

• Yes, because there are the same number of atoms for each element for both reactants and products.

• No, because there are not the same number of atoms of each element in reactants and products.

• No, because one of the products is a liquid, not a gas.

• No, because there are different compounds on the two sides of the arrow.

Tags

NGSS.HS-PS1-7

Suppose you mix solutions of silver nitrate, AgNO₃, with sodium chloride, NaCl, in an open container. How does the mass of the reactants compare to the mass of the products in the container after the reaction is complete?

AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)

• The mass will stay the same.

• The mass will increase.

• The mass will decrease.

• There is not enough information to answer the question.

Tags

NGSS.HS-PS1-7

When water boils into vapor, which of these quantities will change?

• the number of atoms

• its mass

• its volume

• all of the above

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

When the chemical equation below is correctly balanced, what coefficient is placed in front of water?

C₂H₄(g) + O₂(g) → CO₂(g) + H₂O(g)

• 3

• 4

• 6

• 2

Tags

NGSS.HS-PS1-7

Which equation below indicates a double exchange reaction?

• NaCl(aq) + AgNO₃(aq) → NaNO₃(aq) + AgCl(s)

• 2Na(s) + 2HCl(aq) → 2NaCl(aq) + H₂(g)

• Hg(NO₃)₂(s) + H₂O(l) → Hg(NO₃)₂(aq)

• H₂O(g) → H₂O(l)