advanced chem review

What are the missing coefficients for the equation below?

Al₂(SO₄)₃ + KOH → Al (OH)₃ + K₂SO₄

• 1,3,2,3

• 2,12,4,6

• 4,6,2,3

• 1,6,2,3

What are the missing coefficients for the equation below?

          Cr+ Fe(NO₃)₂ → Fe + Cr(NO₃)₃

• 4,6,6,2

• 2,3,2,3

• 2,3,3,2

• 1,3,3,1

What are the missing coefficients for the equation below?

NH₃ + O₂ → N₂ + H₂O

• 4,3,2,6

• 2,1,2,3

• 1,3,1,3

•   2,3,2,3

What are the missing coefficients for the equation below?

           AlCl₃+ NaOH → Al(OH)₃ + NaCl

• 1,3,1,3

• 3,1,3,1

• 1,1,1,3

• 1,3,3,1

Aluminum chloride and bubbles of hydrogen gas are produced when metallic aluminum is placed in hydrochloric acid. What is the balanced equation?

• H+ AlCl → Al + HCl

• 2Al + 6HCl →2AlCl₃ + 3H₂

• Al + HCl₃→AlCl₃ +H

• Al + 2HCl →AlCl₂+H₂

What does the symbol ∆ in a chemical equation mean?

• heat is supplied to the reaction

• a catalyst is needed

• yields

• precipitate

Which of the following is the correct equation for the reaction that takes place when solid phosphorus combines with oxygen gas to form diphosphorus pentoxide?

• P+ O₂ →PO₂

• P+O₂ →P₂O₅

• P +O →P₂O₅

• A.    P₂O₅→P₂+ O₂

2C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O

Which pair has the mole to mole ratio 8:10?

• C₄H₁₀ and O₂

• CO₂ and H₂O

• O₂ and CO

• H₂O and C₄H₁₀

The combustion of butane (C₄H₁₀) is shown in the balanced chemical equation below: 2C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O

            Molar masses (g/mol): C₄H₁₀ = 58; O₂ =32; CO₂ = 44; H₂O = 18

If 65.3 moles of oxygen gas are consumed, how many moles of carbon dioxide is produced?

• 526.4 moles

• 106.1 moles

• 40.2 moles

• A.    8.16 moles

The combustion of butane (C₄H₁₀) is shown in the balanced chemical equation below:

                2C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O

            Molar masses (g/mol): C₄H₁₀ = 58; O₂ =32; CO₂ = 44; H₂O = 18 How many grams of C4H10 is needed to produce 37.8 moles of CO2?

• 453.6 grams

• 548.1 grams

• 2.61 moles

• 8770 grams