Inv 7 Exp 3 - Limiting Reagents and % Yield - Day 2

4NH₃+6NO --> 5N₂ + 6H₂O

What is the limiting reactant if 10 moles of NH₃ react with 30.0 moles of NO?

• NH₃

• NO

• N₂

• water

4NH₃ + 5O₂ --> 4NO + 6H₂O

How many Liters of NO (at STP) are formed if 6.30g of ammonia react with 1.80g of oxygen?

• 1.5 L

• 2.02 L

• 1.01 L

• 5.04 L

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the

• theoretical yield
• mole ratio
• actual yield
• percentage yield

3. The reactant that is not completely used up in a chemical reaction is called the __________ .

• spectator reagent
• limiting reagent
• excess reagent
• catalyst

6Na + Fe₂O₃ --> 3Na₂O + 2Fe

If you are provided 200g of sodium and 250 grams of iron(III) oxide, how much of excess reagent is left?

• 232 g

• 18 g

• 250 g

• 50 g

LAB SAFETY QUESTION:

Approved eye protection (such as goggles) are worn in the laboratory...

• to avoid eye squinting.

• to improve your vision.

• only if you do not have glasses.

• any time chemicals, heat, or glassware are used.

What still confuses you? How can I help?

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