Stoichiometry Retest II (Edited version)

How many moles of zinc would be required to react with 0.95 moles of copper (II) nitrate according to the reaction Zn + Cu(NO₃)₂ → Cu + Zn(NO₃)₂ is (a)   .

• 1.90 moles of Zn
• 0.475 moles of Zn
• 2 moles of Zn
• 0.95 moles of Zn

If you want to produce 25.0 moles of water from the combustion of propane, how many moles of oxygen will need to react according to the reaction C₃H₈ + 5O₂ → 4H₂O + 3CO₂?

• 31.25 moles of O2

• 20 moles of O2

• 125 moles of O2

• 5 moles of O2

The reaction of sodium phosphate with barium chloride produced 0.56 moles of barium phosphate. How many moles of sodium chloride were also produced according to the reaction 2Na3PO4 + 3BaCl2 → 6NaCl + Ba3(PO4)2?

• 1.68 moles of NaCl

• 3.36 moles of NaCl

• 0.56 moles of NaCl

• 6 moles of NaCl

10.0 grams of heptane (C₇H₁₆) react with oxygen according to the following equation: C₇H₁₆ + 11O₂ → 8H₂O + 7CO₂. How many grams of water are formed?

• 14.9 grams of H₂O

• 10 grams of H₂O

• 11 grams of H₂O

• 8 grams of H₂O

Using the following equation C₇H₁₆ + 11O₂ → 8H₂O + 7CO₂, if you make 35.0 grams of water how many grams of oxygen did you use?

• 85.55 grams of O₂

• 35 grams of O₂

• 70 grams of O₂

• 17.5 grams of O₂

The reaction of sodium phosphate with iron (III) chloride produces 325.0 grams of iron (III) phosphate. How many grams of iron (III) chloride were reacted?

Na₃PO₄ + FeCl₃ --> FePO₄ + 3NaCl

• 279.98 g FeCl₃

• 379.98 g FeCl₃

• 349.78 g FeCl₃

• 249.78 g FeCl₃

Na₃PO₄ + FeCl₃ --> FePO₄ + 3NaCl

If you have 125 gram of iron (III) chloride how much salt could you make?

• 162.35 grams

• 135.12 grams

• 341.78 grams

• 150.85 grams

If 3.0 liters of N₂ is combined with 8.0 liters of H₂ at STP, according to the equation below, how many liters of NH₃ will be produced?

N_2(g) + 3H_2(g) --> 2NH₃

• 2.2 liters

• 5.33 liters

• 6.0 liters

• 8.0 liters

The decomposition reaction for hydrogen peroxide is given 2H₂O₂(l) --> 2H₂O(l) + O₂(g) How many grams of hydrogen peroxide must be decomposed to produce 5.5 liters of oxygen gas at STP? (a)  

• 34 grams
• 5.5 grams
• 22.4 grams
• 16.69 grams

When zinc reacts with hydrochloric acid (HCl) to form zinc chloride and hydrogen gas, Zn _(g) + 2HCl_(aq) ​ --> ZnCl_2(aq) + H_2(g)

If there are 15.3 grams of HCl to react at STP, how many liters of hydrogen gas would be produced from this reaction?​ (a)   .

• 22.4 liters
• 15.3 liters
• 7.85 liters
• 4.69L H2