Wk #7 & 8 Unit 9 Test Review (Due 2/24 @ midnight)

Using the reaction: CH₄ + 2 O₂ → CO₂ + H₂O

What mass of O₂ is required to produce 14.5 g of CO₂ if the reaction has a 65.0% yield?

• 10.5 g

• 21.1 g

• 27 g

• 32.4 g

• 16.2 g

If 39.0 g of C₆H₆ reacts with excess chlorine and produces 30.0 g of C₆H₅Cl in the reaction C₆H₆ + Cl₂ → C₆H₅Cl + HCl, what is the percent yield of C₆H₅Cl?

• 53.4%

• 13.2%

• 76.9%

• 69.4%

• 50.0%

Consider the reaction N₂ + H₂ → NH₃. What is the stoichiometric coefficient of H₂ in the balanced equation?

• 1

• 2

• 3

• 4

14.0 moles of N₂ and 48.0 moles of H₂ are reacted, producing 21.5 moles of NH₃. What is the percent yield?

• 67.2%

• 100.0%

• 76.8%

• Not enough information is given.

• 130.2%

Tags

NGSS.HS-PS1-7

Nitric oxide (NO) is made from the oxidation of NH₃ according to the equation 4 NH₃ + 5 O₂ → 4 NO + 6 H₂O. If a 14.97 g sample of NH₃ gives 8.3 g of NO, what is the percent yield?

• 100%

• 26%

• 31%

• 69%

Calculate the maximum amount of CO₂ that can be produced when 64.0 g of O₂ and 64.0 g of CH₃OH are mixed for the reaction: 2 CH₃OH + 3 O₂ → 2 CO₂ + 4 H₂O.

• 58.7 g

• 88.0 g

• 64.0 g

• 35.5 g

• 44.0 g

In the reaction of 1.80 mole NH₃(g) and 2.00 mole O₂(g), 4 NH₃(g) + 5 O₂(g) → 4 NO(g) + 6 H₂O(l), which is the limiting reactant?

• O₂ limiting; 1.6 mol NH₃ left over

• O₂ limiting; 1.8 mol NH₃ left over

• NH₃ limiting; 0.25 mol O₂ l left over

• O₂ limiting; 0.2 mol NH₃ left over

• O₂ limiting; 0.4 mol NH₃ left over

Balance the reaction equation H₂ + O₂ → H₂O. If 5.00 grams of H₂ and 10.0 grams of O₂ are available, how much H₂O is formed?

• 5.63 grams

• 11.3 grams

• 22.6 grams

• 2.6 grams

• 17.0 grams

Tags

NGSS.HS-PS1-7

Determine the limiting reactant if 50.0 g of NO are mixed with 30.0 g of O₂ according to the reaction 2 NO + O₂ → 2 NO₂.

• NO

• O₂

• NO₂

• It is impossible to determine.

• There is not a limiting reactant.

Tags

NGSS.HS-PS1-7

Consider the reaction Zn(s) + 2 HCl(aq) → ZnCl₂(aq) + H₂(g).

What mass of ZnCl₂ (MW = 136.3 g/mol) can be prepared from the reaction of 3.27 grams of zinc (MW = 65.38 g/mol) with 3.00 grams HCl (MW = 36.46 g/mol)?

• 5.61 g

• 6.82 g

• 11.22 g

• 7.35 g

• 13.64 g

Tags

NGSS.HS-PS1-7