# need help with chemical reactions hw? details below.

1) Describing Chemical Reactions Apply

In this lesson, you learned about chemical equations, word equations, and formula equations. Now, you will demonstrate your knowledge of these concepts by responding to the following prompt. Remember to show each step of your work. • Write the word, formula, and chemical equations for the reaction between hydrogen sulfide gas and oxygen gas that produces sulfur dioxide gas and water vapor.

• The reaction of vanadium(II) oxide with iron(III) oxide results in the formation of vanadium(V) oxide and iron(II) oxide. Write the balanced chemical equation.

“Make sure to show your work, and your answers should be provided with the correct amount of significant figures.”

YOU WILL RECEIVE A SCORE REDUCTION IF THE ABOVE REQUIREMENTS ARE NOT MET.

2) Types of Chemical Reactions Apply

In this lesson, you learned about synthesis reaction, decomposition reaction, electrolysis, single-displacement reaction, and combustion reaction. Now, you will demonstrate your understanding of these concepts by responding to the following prompt.

For each of the following reactions, write the missing product(s) and then balance the resulting equation. Identify each reaction by type.

a. Br2 + KI →

b. NaClO3 → Δ

c. C7H14 + O2 →

d. CuCl2 + Na2S →

“Make sure to show your reasoning for each equation”

YOU WILL RECEIVE A SCORE REDUCTION IF THE ABOVE REQUIREMENTS ARE NOT MET.

3) Chemical Equations and Reactions Summative Practice

1. According to the law of conservation of mass, the total mass of the reacting substances is ________.

A) always more than the total mass of the products

B) always less than the total mass of the products

C) sometimes more and sometimes less than the total mass of the products

D) always equal to the total mass of the products

2. To balance a chemical equation, you may adjust the ________.

A) coefficients

B) subscripts

C) formulas of the products

D) either the coefficients or the subscripts

3. Which is the correct chemical equation for the following formula equation: (NH4)2S → NH3+H2S?

A) 2(NH4)2S → 2NH3+H2S2

B) 2(NH4)2S → 2NH3+H2S

C) (NH4)2S → 2NH3+H2S

D) None of the above

4. Select the missing reactant(s) for the double displacement reaction that produces PF5 and AsCl3.

A) PCl3 and AsF5

B) PCl5 and AsF3

C) PCl3 and AsF3

D) None of the above

5. Select the missing reactant for the following combustion reaction: 2____+15O2 → 14CO2+6H2O.

A) C14H12

B) C14H12O4

C) C7H6

D) C7H6O2

6. A mixture consists of Ag, Pb, and Fe metals. Which of these metals will react with ZnCl2?

A) Ag(s)

B) Pb(s)

C) Fe(s)

D) None of these metals

7. Which of the following statements is true about the reaction 2F2+2H2O → 4HF+O2?

A) Two grams of O2 are produced when 2g F2 reacts with 2g H2O

B) Two moles of HF are produced when 1 mol F2 reacts with 1 mol H2O

C) For every 2 mol O2 produced, 6 mol HF are produced.

D) For every 1 mol H2O that reacts, 2 mol O2 are produced.