Free Printable Timberlake Chapter 8 study slides

1.

What coefficient should be used to make the following equation balanced?
N₂+O₂--> _NO

a)

1

b)

2

c)

3

d)

4

2.

Which equation is balanced?

a)

PbO₂ + 2H₂

b)

SO₂ + H₂0 --> H₂SO₄

c)

2Na + 2H₂O --> 2NaOH + H₂

3.

How many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl₂ + H₂

a)

1

b)

2

c)

3

d)

4

4.

What law governs the balancing of chemical equations?

a)

Law of Energy

b)

Law of Conservation of Matter/Mass

c)

Law of Gravity

d)

Law of Matter Movement

5.

What is the total number of atoms present in 5Na₃PO₄

a)

5

b)

40

c)

55

d)

8

6.

Balance this equation

_Al +_HCl --> _H₂+_AlCl₃

a)

2,6,3,2

b)

it's already balanced

c)

4,12,3,4

d)

2,1,4,5

7.

What are the coefficients that would properly balance this equation?

__Ca + __H₂O --> __Ca(OH)₂ + __H₂

a)

2,1 --> 2,1

b)

1,2 --> 1,1

c)

1,2 --> 2,4

d)

1,2 --> 2,1

8.

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CO + __Fe₂O₃--> __Fe + __CO₂

a)

3,1 --> 2,3

b)

3,2 --> 1,1

c)

3,2 --> 2,4

d)

3,2 --> 2,1

9.

What are the coefficients that would properly balance this equation?

__AgNO₃ + __H₂S --> __Ag₂S+ __HNO₃

a)

2,1 --> 1,2

b)

1,2 --> 1,1

c)

1,2 --> 1,2

d)

1,2 --> 2,1

10.

What are the coefficients that would properly balance this equation?

__H₂ + __S --> __H₂S

a)

1,1 --> 1

b)

2,2 --> 2

c)

1,2 --> 1

d)

1,2 --> 2

11.

What are the coefficients that would properly balance this equation?

__Al + __O₂--> __Al₂O₃

a)

4,1 --> 2

b)

4,3 --> 4

c)

3,4 --> 1

d)

4,3 --> 2

12.

What is the total number of atoms present in 5Na₃PO₄

a)

5

b)

40

c)

55

d)

8

13.

Determine the coefficients to make the following equation balanced?

__N₂+ __O₂--> __NO

a)

1, 1, 1

b)

1, 1, 2

c)

2, 2, 2

d)

1, 2, 2

14.

Determine the coefficients to balance the equation.

__Al +__HCl --> __H₂+__AlCl₃

a)

2,6,3,2

b)

it's already balanced

c)

4,12,3,4

d)

2,1,4,5

15.

Balance the the following equation.

__Zn+__HCl -->__ZnCl₂+__H₂

a)

1,1,2,1

b)

1,1,1,2

c)

1,2,1,1

d)

2,1,1,1

16.

Which number should go in the blank?
Mn + _ HNO₃ → Mn(NO₃)₂ + H₂

a)

1

b)

2

c)

3

d)

0

17.

Which number should go in the blank?
Al(NO₃)₃ + _ NaOH -> Al(OH)₃ + 3 NaNO₃

a)

1

b)

2

c)

3

d)

0

18.

The numbers needed to balance the equation are:

a)

1, 1, 1, 2

b)

1, 1, 2, 2

c)

1, 1, 1, 1

d)

2, 3, 1, 3

19.

The numbers needed to balance the equation are:

a)

2, 7, 6, 4

b)

2, 1, 3, 2

c)

1, 1, 3, 2

d)

2, 3, 1, 3

20.

The numbers needed to balance the equation are:

a)

2, 7, 6, 4

b)

2, 1, 3, 2

c)

3, 1, 1, 3

d)

2, 3, 1, 3

21.

The substances listed on the right side of a chemical equation are the

a)

Yields

b)

Reactants

c)

Products

d)

Precipitates

22.

CaCO₃ represents a chemical

a)

Symbol

b)

Formula

c)

Subscript

d)

Reaction

23.

The substances listed on the left side of a chemical equation are the

a)

Products

b)

Coefficients

c)

Precipitates

d)

Reactants

24.

In chemical reactions, what does the principle of conservation of mass mean?

a)

Matter is not created or destroyed.

b)

The total mass of the reactants is greater than the total mass of the products.

c)

The total mass of the reactants is less than the total mass of the products.

d)

Matter is not changed.

25.

In balancing chemical equations, we change

a)

Coefficients

b)

Subscripts

c)

Both can be changed

d)

None can be changed

26.

How many phosphorus atoms are in PO₄?

a)

1

b)

2

c)

3

d)

4

27.

How many hydrogen atoms are in 2 H₂?

a)

1

b)

2

c)

3

d)

4

28.

Which number should go in the blank?
_ H₂ + O₂ -> 2 H₂O

a)

1

b)

2

c)

3

d)

0

29.

Which number should go in the blank?
2 Na+ _ Cl₂ -> 2 NaCl

a)

1

b)

2

c)

3

d)

0

30.

Which number should go in the blank?
Mn + _ HNO₃ → Mn(NO₃)₂ + H₂

a)

1

b)

2

c)

3

d)

0

31.

Which number should go in the blank?
Al(NO₃)₃ + _ NaOH -> Al(OH)₃ + 3 NaNO₃

a)

1

b)

2

c)

3

d)

0

32.

Which number should go in the blank?
Al(NO₃)₃ + _ NaOH -> Al(OH)₃ + 3 NaNO₃

a)

1

b)

2

c)

3

d)

0

33.

How many oxygen atoms are present in the following?
4Ca(OH)₂

a)

4

b)

6

c)

8

d)

1

34.

This is used to represent the amount of each atom in a molecule. What is the arrow pointing to?

a)

Exponent

b)

Coefficient

c)

Molecule

d)

Subscript

35.

How many Iron (Fe) atoms are in this chemical formula?

a)

2 iron atoms

b)

6 iron atoms

c)

5 iron atoms

d)

4 iron atoms

36.

What physical state symbol should be included for water?

a)

(s) - solid

b)

(l) - liquid

c)

(g) - gas

d)

(aq) - aqueous

37.

What physical state symbol should be included for carbon dioxide?

a)

(s) - solid

b)

(l) - liquid

c)

(g) - gas

d)

(aq) - aqueous

38.

What physical state symbol should be included for glucose?

a)

(s) - solid

b)

(l) - liquid

c)

(g) - gas

d)

(aq) - aqueous

39.

What physical state symbol should be included for oxygen?

a)

(s) - solid

b)

(l) - liquid

c)

(g) - gas

d)

(aq) - aqueous

40.

Why does oxygen's symbol have a subscript "2"?

a)

Because it is monoatomic.

b)

Because it is diatomic.

c)

Because it is triatomic.

41.

What is the molar mass of Fe?

a)

26.0

b)

55.85

c)

81.8

d)

none of these

42.

Which of the following statements regarding the mole is INCORRECT?

a)

A mole is a unit of quantity equal to 6.02 x 10²³ particles.

b)

The number of particles in a mole is known as Avogadro’s number.

c)

A mole of particles of an element is numerically equal to the atomic mass of the element.

d)

none of the above

43.

The mass of one mole of an element is equal to

a)

its atomic number from the periodic table, but in amus.

b)

its atomic mass from the periodic table, but in amus.

c)

its atomic mass from the periodic table, but in grams.

d)

its atomic number from the periodic table, but in grams.

44.

What is the molar mass of PbSO₄?

a)

303.27 g/mol

b)

255.27 g/mol

c)

163.87 g/mol

d)

372.27 g/mol

45.

How many grams are in 1.2 moles of neon?

a)

0.059 grams

b)

7.2 x 10²³ grams

c)

2.0 x 10^-24 grams

d)

24 grams

46.

The mass of one mole of substance is called...

a)

molecular mass

b)

mole constant

c)

molar mass

d)

atomic weight

47.

What is the mass of one mole of aluminum chloride (remember to determine the correct formula first)?

a)

62.435g

b)

116.399g

c)

133.341g

d)

97.888g

48.

How many particles are in a mole?

a)

602

b)

602 million

c)

602 moles

d)

6.02 x 10²³

49.

What is the molar mass of the diatomic element nitrogen?

a)

7 g/mol

b)

14 g/mol

c)

28 g/mol

50.

How many water molecules are in 5.2 moles of water?

a)

6.02 x 10²³

b)

5.2

c)

3.1304 x 10²⁴

d)

8.638 x 10^-24

51.

How many grams are in 11.9 moles of chromium?

a)

50 g

b)

619 g

c)

0.23 g

d)

4.4 g

52.

1 mole of Ca and 1 mole of Na have the same number of atoms.

a)

True

b)

False

53.

Convert 50.0 grams of H₂O to moles of H₂O.

a)

901 moles

b)

18.02 moles

c)

2.77 moles

54.

3.0 moles of sodium hydroxide, NaOH, is equal to what mass?

a)

about 40 grams

b)

about 23 grams

c)

about 120 grams

55.

When converting a mass to moles, what unit must be in the denominator of the conversion factor?

a)

grams

b)

moles

c)

grams/mole

56.

When converting a moles to mass, what unit must be in the denominator of the conversion factor?

a)

grams

b)

moles

c)

grams/mole

57.

Choose all of the following that could be used as a conversion factor when converting from atoms to moles.

a)

1 mole = 6.02 x 10²³ atoms

b)

6.02 x 10²³ atoms = 1 mole

c)

6.02 x 10²³ moles = 1 atom

d)

1 atom = 6.02 x 10²³

58.

Calculate the number of atoms in 3.25 moles of lithium.

a)

1.96 x 10²⁴

b)

2.015

c)

1.85 x 10²³

d)

5.40 x 10^-24

59.

Calculate the number of moles in 1.069 x 10²⁵ atoms.

a)

0.0563

b)

6.48 x 10⁴⁸

c)

17.76

d)

5.63 x 10^-2

60.

True or False: One mole of Sulfur has 2.35 x 10¹⁴ atoms.

a)

True

b)

False

61.

(Hint: write out how you would solve the problem first on paper before choosing an answer.)

How would you set up the problem if you have a sample of 2.50 g of sodium (Na), how many moles of Na do you have?

a)

$2.50g\ Na\ \times\frac{22.99\ mol\ Na}{1\ g\ Na}=$

b)

$2.50\ g\ Na\ \times\frac{1\ mol\ Na}{22.99\ g\ Na}=$

c)

$2.50\ g\ Na\ \times\frac{22.99\ g\ Na}{1\ mol\ Na}=$

d)

$2.50\ g\ Na\ \times\frac{1\ g\ Na\ }{22.99\ mol\ Na}=$

62.

How would you set up the problem if you want to find the mass, in grams, of 0.55 moles of silicon?

a)

$0.55\ mol\ Si\ \times\ \frac{28.09\ g\ Si}{1\ mol\ Si}\ =\$

b)

$0.55\ mol\ Si\ \times\frac{1\ g\ Si\ }{28.09\ mol\ Si}=$

c)

$0.55\ mol\ Si\ \times\frac{28.09\ mol\ Si}{1\ g\ Si}=$

d)

$0.55\ mol\ Si\ \times\frac{1\ mol\ Si}{28.09\ g\ Si}=$

Timberlake Chapter 8 study slides

Total questions: 62

Worksheet time: 2hrs 3mins

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