Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CHM-113 > PQ > Flashcards

PQ Flashcards

1
Q

When nature behaves in a certain way over and over again, under all sorts of different conditions, we can
summarize that behavior (typically a relationship), it is called a(n) _____.

A

Law

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A(n) _______ is formed after an observation and attempts to provide a testable explanation of an observed behavior of
some natural phenomenon.

A

hypothesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

A(n) _____ is a model that is based on a set of tested hypotheses and gives an overall explanation of some natural
phenomenon.

A

theory

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Which of the following statements are incorrect?

a) The state of matter for an object that has a definite volume but not a definite shape is a liquid state
b) The state of matter for an object that has both definite volume and definite shape is solid state
c) The state of matter for an object that has a definite shape and is highly compressible is gaseous state
d) The state of matter for an object that has no definite volume and takes the shape of its container is gaseous state
e) The state of matter for an object that is rigid is solid state

A

C).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

An example of a pure substance is ____.

a) an element
b) a compound
c) H2O
d) carbon dioxide
e) all of these

A

E).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

. An example of an element is ____.

a) chicken noodle soup		 
b) powerade			  
     c) air inside a balloon		 
     d) lead pipe			 
     e) baking soda (NaHCO3)
A

D).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

. An example of a compound is _____.

a) chicken noodle soup

b) powerade 
     c) air inside a balloon
     d) lead pipe 
     e) baking soda (NaHCO3)
A

E).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

An example of a homogeneous mixture is _____.

a) chicken noodle soup

b) powerade		
     c) a balloon filled with air
     d) lead pipe
     e) baking soda (NaHCO3)
A

B).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

An example of a heterogeneous mixture is _____.

a) chicken noodle soup

b) powerade
     c) air inside a balloon
     d) lead pipe
     e) baking soda (NaHCO3)
A

A).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Select the incorrectly matched pair for unit and dimension.

a) Time – seconds
     b) Amount of substance – grams
     c) Mass – kilograms
     d) Length – meters
     e) Volume – cubic centimeters
A

B).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Which of the following metric relationships is incorrect?

a) 1 microliter = 10–6 liters
b) 1 gram = 103 kilograms
c) 103 milliliters = 1 liter
d) 1 gram = 102 centigrams
e) 10 decimeters = 1 meter

A

B).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q
  1. 0 ng is equal to
    a) 2.0 x 10-7 g
    b) 2 x 103 g
    c) 2.0 x 10-9 g
    d) 2.0 x 109 g
    e) 2.0 x 107 g
A

C).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Perform the indicated mathematical operation and round the answer to the correct number of significant figures.
4201.5 – 0.08 + 181/0.544 =

a) 4530
b) 4534.14
c) 4534
d) 4534.1
e) 4500
A

C),

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How close a measured number is to other measured numbers is _____.

A

precision

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How close a measured number is to the true value is _____.

A

c) accuracy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

A dozen doughnuts is an example of _____.

A

b) exact number

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

A BMI of 21 is an example of _____.

A

a) measured number

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

424 Kelvin equals

a) 151 °F
b) 273 °F
c) 697 °F
d) 151 °C
e) 697 °C

A

D).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q
  1. 2°F is equal to _____ °C.
    a) 36.2
    b) 4.20
    c) 33.2
    d) 18.4
    e) 60.0
A

D).

20
Q

Calculate the volume of silver metal that weighs exactly 2.50 kg. The density of silver is 10.5 g/cm3.

a) 0.238 mL
b) 238 mL
c) 26.3 mL
d) 4.20 mL
e) 0.00420 mL

A

B).

21
Q

Calculate the density (in g/mL) of an object that has a mass of 12.2 g and occupies a volume of 0.50 m3.

a) 2.4 x 10-5 g/mL
b) 24 g/mL
c) 0.24 g/mL
d) 4.1 x 10-2 g/mL
	e) 4.1 g/mL
A

A).

22
Q

Calculate the mass of an object that has a volume of 100.0 L and a density of 1.00 g/mL.

a) 100. g
	b) 1.00 x 105 g
c) 1.00 x 103 g
d) 1.00 x 10-2 g
e) 1.00 g
A

B).

23
Q

Which one of the following is not one of the postulates of Dalton’s atomic theory?
a) Atoms are composed of protons, neutrons, and electrons.
b) All atoms of a given element are identical; the atoms of different elements are different and have different
properties.
c) Atoms of an element are not changed into different types of atoms by chemical reactions: atoms are neither
created nor destroyed in chemical reactions.
d) Compounds are formed when atoms of more than one element combine; a given compound always has the same
relative number and kind of atoms.
e) Each element is composed of extremely small particles called atoms.

A

A)

24
Q

Which of the following pairs of compounds can be used to illustrate the law of multiple proportions?

a) NH4 and NH4Cl
b) ZnO2 and ZnCl2
c) H2O and HCl
d) NO and NO2
e) CH4 and CO2

A

D).

25
Q

The _____ states that the total mass of materials present after a chemical reaction is the same as the total mass
present before the reaction.

A

Law of conservatino of mass

26
Q

The _____ states that the relative number of atoms of each element in the compound is the same in any sample.

A

Law of constant composition

27
Q

The _____ states that if two elements A and B combine to form more than one compound, the masses of B that
can combine with a given mass of A are in the ratio of small whole numbers.

A

Law of multiple proportion

28
Q

Select the incorrect statement below.

a) Cations are positively charged ions.
b) Anions are negatively charged ions.
c) Atoms that gain an electron are called anions.
d) Atoms that gain a neutron are called cations.
e) All statements are correct.
A

D).

29
Q

Select the correct statement below.

a) Ionic compounds form between a metal cation and a anionic non-metal.
b) Covalent compounds form between two metals.
c) Isotopes of an element have different numbers of electrons.
d) Ions of an element have different numbers of neutrons.
e) Two different elements can have the same number of protons.
A

A).

30
Q

There are ________ electrons, ________ protons, and ________ neutrons in an isotope of sulfide ion-33.

A

18, 16, 17

31
Q

What is the correct nuclear symbol for a neutral atom of sodium with a mass number of 20 and 10 electrons?

a) 22Na+
b) 11Na+
c) 20Na
d) 22Na
e) 20Na+
A

E).

32
Q

Which of the following contain the same number of electrons?

I.  Cl-		II.  Cl		III.  S		IV.  S2-		V.  F-
A

E). I and IV only

33
Q

. Argon has three naturally occurring isotopes: argon-36, argon-38, and argon-40. Based on argon’s atomic weight on
the periodic table, which isotope is the most abundant in nature?

A

AR-40

34
Q

The element X has three naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are given
in the table below. The average atomic mass of the element is ________ amu.

A

b) 220.4

35
Q
  1. Select the incorrectly paired items.
    a) Li and Na are alkali metals
    b) Ca and Ba are alkaline earth metals
    c) Cl and Br are halogens
    d) F and Ne are in the same period
    e) S and P are in the same group
A

E).

36
Q

How many carbonite ions are in one formula unit of Al2(CO3)3?

A

zero

37
Q

The correct name of Al2(CO3)3 is _____.

A

Aluminium Carbornate

38
Q

The anion in Al2(CO3)3 has a charge of _____.

A

c) -2

39
Q

The correct name for LiCl is

A

d) lithium chloride

40
Q

The correct name for CuN is _____.

A

copper(III) nitride

41
Q

The correct formula for tetraphosphorous hexasulfide is _____.

A

a) P4S6

42
Q

The correct formula for carbonic acid is _____.

A

H2CO3

43
Q

The correct formula for hydroiodic acid is _____.

A

HI

44
Q

All of the following are in aqueous solution. Which is incorrectly named?

a) HC2H3O2, acetic acid
b) HBr, bromic acid
c) H2SO3, sulfurous acid
d) HNO2, nitrous acid
e) HClO3, chloric acid

A

B).

45
Q

Which of the following pairs is incorrect?

a) NH4Br, ammonium bromide
b) K2CO3, potassium carbonate
c) BaPO4, barium phosphate
d) CuCl, copper(I) chloride
e) MnO2, manganese(IV) oxide

A

C).

CHM-113 (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions