Free Printable Unit 10 Exit Ticket #1: Mole Ratios

1.

What is the first thing you must do to solve a stoichiometry problem?

a)

Write a Balanced Equation

b)

Panic

c)

Write an Unbalanced Equation

d)

Ask for help

2.

What can be determined from a balanced chemical equation?

a)

Mole ratio of any two substances in the reaction

b)

Energy released in the reaction.

c)

Electron configuration of all elements in the reaction.

d)

Mechanism involved in the reaction.

3.

When you are converting units, how do you set up your conversion factor?

a)

The units you have in hand on the top and the units you’re looking for on the bottom

b)

The units you’re looking for on the top and the units you have in hand on the bottom

c)

Either way because a conversion factor (ratio) can be flipped over depending on what you need to do

4.

N₂ + 3H₂ → 2NH₃

What is the mole ratio between Nitrogen and Ammonium in the above reaction?

a)

1 moles NH₃ / 2 moles N₂

b)

2 moles NH₃ / 1 moles N₂

c)

2 moles N₂ / 3 moles NH₃

d)

1 moles N₂ / 3 moles NH₃

5.

In the equation 2 Al₂O₃ --> 4 Al + 3 O₂, what is the mole ratio of aluminum to oxygen?

a)

$\frac{10\ mole\ Al}{6\ mole\ O_2}$

b)

$\frac{3\ mole\ Al}{2\ mole\ O_2}$

c)

$\frac{4\ mole\ Al}{3\ mole\ O_2}$

d)

$\frac{2\ mole\ Al}{3\ mole\ O_2}$

6.

Mole ratios are obtained from the

a)

balanced chemical equation

b)

periodic table

c)

molar mass

7.

N₂ + 3H₂ → 2NH₃

What is the mole ratio between N₂and NH₃ in the above reaction?

a)

1 moles NH₃ / 2 moles N₂

b)

2 moles NH₃ / 1 moles N₂

c)

2 moles N₂ / 3 moles NH₃

d)

1 moles N₂ / 3 moles NH₃

8.

Which of the following represent a mole ratio between silver nitrate and copper(II) nitrate in the following reaction:
2AgNO₃ + Cu --> Cu(NO₃)₂ + 2Ag

a)

2 mol AgNO₃ / 2 mol Ag

b)

2 mol Ag / 2 mol AgNO₃

c)

2 mol AgNO₃ / 2 mol Cu(NO₃)₂

d)

2 mol AgNO₃ / 1 mol Cu(NO₃)₂

9.

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?

a)

3mol Mg / 2 mol Fe

b)

2 mol Mg/ 3 mol Fe

c)

1 mol Fe/ 2 mol Fe

d)

3 mol MgO / 2 mol Fe

10.

In the reaction 2 H₂ + O₂ → 2 H₂O what is the mole ratio of oxygen to water

a)

$\frac{1\ mole\ O_2}{2\ moles\ H_2O}$

b)

$\frac{2\ mole\ oxygen}{1\ mole\ water}$

c)

$\frac{3\ moles\ oxygen}{2\ moles\ water}$

d)

$\frac{4\ moles\ O_2}{3\ moles\ H_2O}$

Unit 10 Exit Ticket #1: Mole Ratios

Total questions: 10

Worksheet time: 34mins

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