Stoichiometry

Which is the correct answer? (3 Points)

• a) 1 gram of atoms

• b) 1 mole of atoms

• c) 1 liter of atoms

Try it on your own before they go into the math. How many slices of bread do you need to make 7 grilled cheese sandwiches? (3 Points)

• 2

• 7

• 14

• 21

Where did the "2" and the "1" in the fraction come from? (3 Points)

• The balanced "equation" recipe at the top of the slide

• The amount of sandwiches we want as the final product.

Balance the equation. What should the coefficient in front of the ammonia (NH₃) be? (3 Points)

• 1

• 2

• 3

How many hydrogen molecules do you need to react with 10 nitrogen molecules? (3 Points)

• 3

• 10

• 20

• 30

If you have 30 hydrogen molecules and 10 nitrogen molecules, how many ammonia molecules will you make? (3 Points)

• 2

• 10

• 20

• 30

How should this fraction be set up? (3 Points)

• (1 mol N₂ / 2 mol NH₃)

• (1 mol N₂ / 3 mol H₂)

• (2 mol NH₃ / 1 mol N₂)

How many moles of NH₃ can you make from 6.20 moles of N₂? (3 Points)

• 3.1 moles NH₃

• 18.6 moles NH₃

• 12.4 moles NH₃

How many moles of hydrogen do you need to react with 0.850 moles of nitrogen? (3 Points)

• 2.55 moles of hydrogen

• 1.7 moles of hydrogen

• 1.275 moles of hydrogen