1) Pure substances: a) are heterogeneous b) have three visible phases c) have constant physical properties d) have a variable composition 2) Solutions of barium hydroxide and calcium nitrate are mixed. What precipitate will form? a) calcium hydroxide b) barium nitrate c) barium nitrate and calcium hydroxide d) there will be no precipitate formed 3) A glass cylinder contains 2 gases at a pressure of 106 kPa. If one gas is at 7 kPa, what is the pressure of attributed to the other gas? a) 113 kPa b) 99 kPa c) 7 kPa d) 9 kPa e) 2 kPa 4) What is the [H+] of a solution that has a pH of 12? a) 1 x 10-13 M b) 12 x 101 M c) 1 x 10-2 M d) 1 x 1012 M e) 1 x 10-12 M 5) A hydrochloric acid solution contains a concentration of hydrogen ions of 5.8 x 10-4 M. What is the solution's pH? a) 4.8 b) -1 c) 3.2 d) -3.2 e) 0.8 6) According to the activity series, if you place a piece of zinc in a solution of copper (II) chloride, it will dissolve. a)Trueb)False 7) All chemical reactions result in: A) a change in the structure of the reactant atoms B) energy being liberated in the form of heat and/or light C) a change in the atomic number of atoms involved D) a rearrangement of the atoms into new substances. 8) Acetylene, C2H2, burns completely in oxygen, O2, to produce carbon dioxide, CO2, and water, H2O, according to:2C2H2 + 5O2 → 4CO2 + 2H2OIf 8.3 mol of C2H2 are completely burned in excess oxygen, the number of moles of CO2 produced area)4.00molb)8.33molc)4.15mold)16.6mole)14.2mol 8) NaO will be made and will form a base when reacted with water. Sodium has reacted with oxygen. What is the name of the product and what will happen if this product is reacted with water?a) NaO will be made and will form a base when reacted with water.b)Na2O will be made and will form an acid when reacted with water.c)Na2O will be made and will not form a base when reacted with water.d)Na2O will be made and will form a base when reacted with water. 9)Which of the following are products of an incomplete combustion reaction?a) COb)CO2 and H2Oc)Cd)Two of the abovee)All of the above

We have to solve the problem based on general chemistry I am solving above three problem upload…

Answered: ) Pure substances: a) are…

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter11: Solutions

Section: Chapter Questions

Problem 66AP: Relative solubilities of salts in liquid ammonia can differsignificantly from those in water. Thus,...

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1) Pure substances:

a)	are heterogeneous

b)	have three visible phases

c)	have constant physical properties

d)	have a variable composition

2) Solutions of barium hydroxide and calcium nitrate are mixed. What precipitate will form?

a)	calcium hydroxide

b)	barium nitrate

c)	barium nitrate and calcium hydroxide

d)	there will be no precipitate formed

3) A glass cylinder contains 2 gases at a pressure of 106 kPa. If one gas is at 7 kPa, what is the pressure of attributed to the other gas?

113 kPa

99 kPa

7 kPa

9 kPa

2 kPa

4) What is the [H⁺] of a solution that has a pH of 12?

a)	1 x 10^-13 M

b)	12 x 10¹ M

c)	1 x 10^-2 M

d)	1 x 10¹² M

e)	1 x 10^-12 M

5) A hydrochloric acid solution contains a concentration of hydrogen ions of 5.8 x 10^-4 M. What is the solution's pH?

4.8

-1

3.2

-3.2

0.8

6) According to the activity series, if you place a piece of zinc in a solution of copper (II) chloride, it will dissolve.

a)	True
b)	False

7) All chemical reactions result in:

A)	a change in the structure of the reactant atoms

B)	energy being liberated in the form of heat and/or light

C)	a change in the atomic number of atoms involved

D)	a rearrangement of the atoms into new substances.

8) Acetylene, C₂H₂, burns completely in oxygen, O₂, to produce carbon dioxide, CO₂, and water, H₂O, according to:

2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O

If 8.3 mol of C₂H₂ are completely burned in excess oxygen, the number of moles of CO₂ produced are

a)	4.00mol
b)	8.33mol
c)	4.15mol
d)	16.6mol
e)	14.2mol

8) NaO will be made and will form a base when reacted with water. Sodium has reacted with oxygen. What is the name of the product and what will happen if this product is reacted with water?

a)	NaO will be made and will form a base when reacted with water.
b)	Na₂O will be made and will form an acid when reacted with water.
c)	Na₂O will be made and will not form a base when reacted with water.
d)	Na₂O will be made and will form a base when reacted with water.

9)Which of the following are products of an incomplete combustion reaction?

a)	CO
b)	CO₂and H₂O
c)	C
d)	Two of the above
e)	All of the above

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