Chemical Principles – Flashcards

Unlock all answers in this set

Unlock answers
question

A classroom contains 24 chairs.

 

 

 

a. exact number

 

b. inexact number

answer

 

 

 

 

a. exact number

question

There are 60 seconds in a minute.

 

 

a. exact number

 

b. inexact number

answer

 

 

 

 

 

a. exact number

question

A bag of cherries weighs 4.1 pounds.

 

 

a. exact number

 

b. inexact number

answer

 

 

 

 

 

 

b. inexact number

question

A newspaper article contains 421 words.

 

 

a. exact number

 

b. inexact number

answer

 

 

 

 

a. exact number

question

With a high grade measuring device, the volume of a liquid is determined to be 6.321 L. Measurements are taken with lesser-grade equipement. How does it compare in terms of accuracy and precision.

         Test 1      Test 2     Test 3      Test 4

         6.35 L      6.31 L      6.38 L      6.32 L

 

a. accurate and precise

b. inaccurate but precise

c. Inaccurate and inprecise

answer

 

 

 

 

 

c. inaccurate and inprecise

question

With a high grade measuring device, the volume of a liquid is determined to be 6.321 L. Measurements are taken with lesser-grade equipement. How does it compare in terms of accuracy and precision.

         Test 1      Test 2     Test 3      Test 4

         6.31 L      6.32 L      6.33 L      6.32 L

 

a. accurate and precise

b. inaccurate but precise

c. Inaccurate and inprecise

answer

 

 

 

 

 

a. accurate and precise

question

With a high grade measuring device, the volume of a liquid is determined to be 6.321 L. Measurements are taken with lesser-grade equipement. How does it compare in terms of accuracy and precision.

         Test 1      Test 2     Test 3      Test 4

         6.36 L      6.35 L      6.35 L      6.36 L

 

a. accurate and precise

b. inaccurate but precise

c. Inaccurate and inprecise

answer

 

 

 

 

 

b. inaccurate but precise

question

What is the difference between the times 3.3 seconds and 3.30 seconds?

 

 

a. There is no difference

b. 3.3 sec is ±0.1 and 3.30 sec is ±0.01accurate

c. 3.3sec  is ±0.01 and 3.30 sce ±0.001accurate

d. 3.3 sec is ±0.001 and 3.30 sec is ±0.0001accurate

 

answer

 

 

 

 

b. 3.3 sec is ±0.1 and 3.30 sec is ±0.01accurate

question

Determine the number of significant figures in:

0.00043

 

a. one

b. two

c. four

d. five

answer

 

 

 

 

 

 

b. two

question

Determine the number of significant figures in:

0.0220022

 

a. four

b. six

c. seven

d. eight

answer

 

 

 

 

 

b. six

question

Determine the number of significant figures in:

0.30303030

 

a. six

b. seven

c. eight

d. nine

answer

 

 

 

 

c. eight

 

The last zero in a signifcant figure because it occurs after a desimal.

question

Determine the number of significant figures in:

0.03030303

 

a. six

b. seven

c. eight

d. nine

answer

 

 

 

 

 

 

                           b. seven

 

 

 

 

question

True or false, these numbers conatin the same amount of signifcant figures:

 

11.01 and 11.00

 

a. True

b. False

answer

 

 

 

 

 

a. True

 

 

The zeroes after a desimal are signifcant

question

True or false, these numbers contain the same amount of signifcant figures:

 

2002 and 2020

 

a. True

b. False

answer

 

 

 

 

 

 

b. False

question

True or false, these numbers conatin the same amount of signifcant figures:

 

0.05700 and 0.05070

 

a. True

b. False

answer

 

 

 

 

 

a. True

question

True or false, these numbers conatin the same amount of signifcant figures:

 

0.000066 and 660000

 

a. True

b. False

answer

 

 

 

 

 

 

a. True

question

Round off to the number of significant figures indicated:

 

0.350763 (three)

 

a. 0.350

b. 0.351

c. 0.35

d. 0.3508

answer

 

 

 

 

b. 0.351

question

Round off to the number of significant figures indicated:

 

653.899 (four)

 

a. 653.8

b. 653.9

c. 654.0

d. 653.90

answer

 

 

 

 

 

b. 653.9

question

Round off to the number of significant figures indicated:

 

22.55555 (five)

 

a. 22.555

b. 22.556

c. 22.560

d. 22.557

answer

 

 

 

 

 

b. 22.556

question

Round off to the number of significant figures indicated:

 

0.277654 (four)

 

a. 0.2776

b. 0.2777

c. 0.2778

d. 0.2775

answer

 

 

 

 

 

a. 0.2776

question

Rewrite so the number only contains two significant figures:

 

0.123

 

a. 0.1

b. 0.12

c. 0.13

d. 0.123

answer

 

 

 

 

 

 

b. 0.12

question

Rewrite so the number only contains two significant figures:

 

123000

 

a. 123000

b. 120000

c. 100000

d. 12

answer

 

 

 

 

 

b. 120000

question

Rewrite so the number only contains two significant figures:

 

12.3

 

a. 12.3

b. 12.0

c. 12

d. 12.1

answer

 

 

 

 

 

c. 12

question

Rewrite so the number only contains two significant figures:

 

0.000123

 

a. 0.0001

b. 0.00

c. 0.00012

d. 0.000123

answer

 

 

 

 

 

 

c. 0.00012

question

Indicate the number of signifcant figures:

 

4.5 x 4.05 x 4.50

 

a. one

b. two

c. three

d. four

answer

 

 

 

 

 

b. two

question

Indicate the number of signifcant figures:

 

0.100 x 0.001 x 0.010

 

a. one

b. two

c. three

d. four

answer

 

 

 

 

 

 

a. one

question

Indicate the number of signifcant figures:

 

655000

6.5500

 

a. one

b. two

c. three

d. four

answer

 

 

 

 

 

c. three

question

Indicate the number of signifcant figures:

 

6.00

33.000

 

a. one

b. two

c. three

d. four

answer

 

 

 

c. three

 

 

 

question

Indicate the uncertainy of the problem:

 

12.1 + 23.1 + 127.01

 

a. ±0.1

b. ±0.01

c. ±1

d. ±0.001

answer

 

 

  

 

a. ±0.1 (tenths)

question

±Indicate the uncertainy of the problem:

 

43.65 - 23.7

 

a. ±0.1

b. ±0.01

c. ±1

d. ±0.001

answer

 

 

 

 

 

a. ±0.1 (tenths)

question

Indicate the uncertainy of the problem:

 

23.6 + 33 + 17.21

 

a. ±0.1

b. ±0.01

c. ±1

d. ±0.001

answer

 

 

 

 

 

 

c. ±1

question

Indicate the uncertainy of the problem:

 

4650 + 25 + 200

 

a. ±0.1

b. ±10

c. ±1

d. ±100

answer

 

 

 

 

 

 

d. ±100 (hundreds)

question

Determine if the exponent will be positive, negative, or zero when expressed in scientific notation.

                            0.0230

a. Positive

b. Negative

c. Zero

 

 

answer

 

 

a. negative

question

Determine if the exponent will be positive, negative, or zero when expressed in scientific notation.

                            321.7

a. positive

b. negative

c. zero

answer

 

 

 

a. positive

question

Determine if the exponent will be positive, negative, or zero when expressed in scientific notation.

                            6.87

a. positive

b. negative

c. zero

answer

 

 

 

c. zero

question

Determine if the exponent will be positive, negative, or zero when expressed in scientific notation.

                            63002

a. positive

b. negative

c. zero

answer

 

 

 

a. positve

question

10^5 x 10^3

 

 

a. 10^15

b. 10^8

c. 10^5

d. 10^2

 

answer

 

 

 

a. 10^8

question

10^-5 x 10^-3

 

 

a. 10^-15

b. 10^-8

c. 10^8

d. 10^2

answer

 

 

 

b.10^-8

 

question

10^5 x 10^-3

 

 

a. 10^15

b. 10^8

c. 10^2

d. 10^-2

answer

 

 

 

c. 10^2

question

10^-5 x 10^3

 

 

a. 10^-8

b. 10^8

c. 10^2

d. 10^-2

answer

 

 

 

d. 10^-2

question

Solve: (3.245 x10^3) + (1.17 x 10^3)

 

a. 4.415 x10^3

b.

c.

d. 4.42 x10^3

answer

 

 

 

d. 4.42 x10^3

question

Solve: (9.870 x10^-2) - (5.7 x10^-3)

 

a. 9.3 x10^-2

b.

c. 9.30 x10^-2

d.

answer

 

 

 

c. 9.30 x10^-2

question

Solve: (9.356 x10^5) + (3.27 x10^5)

 

a. 9.68 x10^5

b.

c.

d.

answer

 

 

 

a. 9.68 x10^5

question

Solve: (2.030 x10^4) - (1.111 x10^3)

 

a.

b. 1.92 x10^4

c. 1.919 x10^4

d.

answer

 

 

 

 

c. 1.919 x10^4

question

 

 

 

Tera = T

answer

 

 

 

10^12

question

 

 

 

Giga =G

answer

 

 

 

10^9

question

 

 

 

Mega = M

answer

 

 

 

10^6

question

 

 

 

Kilo =k

answer

 

 

 

10^3

question

 

 

 

Hecto =h

answer

 

 

 

10^2

question

 

 

 

 

Deca =da

answer

 

 

 

10^1

question

 

 

 

Deci =d

answer

 

 

 

10^-1

question

 

 

 

Centi =c

answer

 

 

 

10^-2

question

 

 

 

Milli = m

answer

 

 

 

10^-3

question

 

 

 

Micro =µ

answer

 

 

 

10^-6

question

 

 

 

Nano =n

answer

 

 

 

10^-9

question

 

 

 

Pico =p

answer

 

 

 

10^-12

question

 

 

 

Area of a rectangle

answer

 

 

 

A= length x width

question

 

 

 

Area of a circle

answer

 

 

 

Area =∏ x Radius^2

question

 

 

 

Area of a Triange

answer

 

 

 

Area =½ x base x height

question

 

 

 

Volume of Rectanglar Solid

answer

 

 

 

Volume = Length x width x height

question

 

 

 

Volume of a Cylinder

answer

 

 

 

Volume = ∏ x radius^2 x height

question

 

 

 

Volume of a Sphere

answer

 

 

 

Volume = 4/3 x ∏ x radius^3

question

 

 

Conversion of Length

 

cm to in.

answer

 

 

 

2.540 cm

1 in.

question

 

 

Conversion of Mass

 

g to lb

answer

 

 

 

453.6 g

1 lb

question

 

 

Conversion of Volume

 

L to qt

answer

 

 

 

0.9463 L

1 qt

question

Use the appropraite metric prefix to replace scientific notation:

 

6.8 x10^-9 m

answer

 

 

 

6.8 nm

question

Use the appropraite metric prefix to replace scientific notation:

 

3.2 x10^-6 m

answer

 

 

 

3.2 µm

question

Use the appropraite metric prefix to replace scientific notation:

 

7.23 x10^3 L

answer

 

 

 

7.23 kL

question

Use the appropraite metric prefix to replace scientific notation:

 

6.5 x10^9 g

answer

 

 

 

 

6.5 Gg

question
Convert: 25mg to g
answer

 

 

0.025mg

question
Convert: 323 km to m
answer

 

 

323000 m

question
Convert: 25.0 L to dL
answer

 

 

250 dL

question
Convert: 0.010 g to pg
answer

 

 

 

? 1.0 x10^9 pg ?

question
Convert: 244 lb to kg
answer

111 kg

 

 

244 lb x 453.6 g x   1 kg    = 110.6784 kg

              1 lb       10^3 g

question
Convert: 0.250 tons to g
answer

227000 g

 

 

0.250 ton x 2000 lb x 453.6 g = 226800 g

                  1 ton        1 lb

question
Convert: 24.2 in to mm
answer

615 mm

 

 

24.2 in x 2.540 cm x 10^2 mm =

                 1 in          1 cm

question
Convert: 375 cm^3 to ft^3
answer

1.32 x10^-2 ft^3

 

375 cm^3 x (    1 in   )^3 x ( 1 ft )^3 =

                 (2.540 cm)^3 x (12 in)^3

 

375 x   1^3    x    1 ^3 = 0.013243

        2.54^3      12^3

question

All molecules present are triatomic; two substances are present; one phase is present.

 

a. element

b. compound

c. homogeneous mixture

d. heterogeneous mixture

answer

 

d. heterogeneous mixture

 

Heterogeneous (1 phase) mixture (2 substances)

 

question

All molecules present are heteroatomic; one substance is present; two phases are present.

 

a. element

b. compound

c. homogeneous mixture

d. heterogeneous mixture

answer

b. compound

 

One substance, heteroatomic

question

All molecules present are identical and homoatomic; one phase is present.

 

a. element

b. compound

c. homogeneous mixture

d. heterogeneous mixture

answer

a. element

 

one substance of identical homoatomic molecules

question

Both homoatomic and heteroatomic molecules are present; one phase is present.

 

a. element

b. compound

c. homogeneous mixture

d. heterogeneous mixture

answer

c. homogeneous mixture

 

Homogeneos (one phase) mixture (2 types of molecules)

question

One kind of homoatomic molecules is present; one phase is present.

 

a. element

b. compound

c. homogeneous mixture

d. heterogeneous mixture

answer
a. element
question

All molecules present are diatomic; two substances are present; one phase is present.

 

a. element

b. compound

c. homogeneous mixture

d. heterogeneous mixture

answer

b. homogeneous mixture

 

homogeneous (one phase) mixture (two phases)

question

Two kinds of heteroatomic molecules are present; two phases present

 

a. element

b. compound

c. homogeneous mixture

d. heterogeneous mixture

answer

d. heterogeneous mixture

 

Heterogeneous (two phases) mixture (two substances)

question

All molecules present are idenetical, triatomic, and heteroatomic; one phase is present.

 

a. element

b. compound

c. homogeneous mixture

d. heterogeneous mixture

answer
d. compound
question

What does the atomic number indicate?

 

a. number of protons

b. number of neutrons

c. number of electrons

d. number of protons and electrons

answer

 

 

a. number of protons

 

(a neutral element would have an equal number of protons and eletrons)

question

What does the mass number indicate?

 

a. number of protons

b. number of neutrons

c. number of neutrons and protons

d. number of protons and electrons

 

answer

 

c. number of neutrons and protons

question

Three isotopes exist for argon, element 18.  One isotope has an isotopic mass of 35.967amu and a % abundance of 0.337.  A 2nd isotope has an isotopic mass of 37.963 amu and a % adundance 0f 0.063.  The 3rd isotope has an isotopic mass of 39.962 amu.

What are the mass numbers for the 3 isotopes?

answer

 

1st: 36 (35.967 amu)

 

2nd: 38 (37.963 amu)

 

3rd: 40 (39.962 amu)

question

Three isotopes exist for argon, element 18.  One isotope has an isotopic mass of 35.967amu and a % abundance of 0.337.  A 2nd isotope has an isotopic mass of 37.963 amu and a % adundance 0f 0.063.  The 3rd isotope has an isotopic mass of 39.962 amu.

What is the % abundance for the 3rd isotope?

answer

 

99.600%

 

(100.000 -0.337 -0.063)% = 99.600%

 

 

question

Atoms are the basic building blocks for all kinds of matter

 

a. true

b. false

answer

 

 

 

a. true

question

Different types of atmos exist.

 

a. true

b. false

answer

 

 

 

a. true

question

All atoms of a give type are identical

 

a. true

b. false

answer

 

 

 

b. false

question

NaClO(2)

 

a. compound

b. element

answer

 

 

 

a. compound

question

CO

 

a. compound

b. element

answer

 

 

 

a. compound

question

S(8)

 

a. compound

b. element

answer

 

 

 

b. element

question

Al

 

a. compound

b. element

answer

 

 

 

b. element

question

posses a negative charge

 

a. electron

b. proton

c. neutron

d. proton and neutron

answer

 

 

 

a. electron

question

Has mass slightly less than a neutron

 

a. electron

b. proton

c. neutron

d. proton and neutron

answer

 

 

 

b. proton

question

Can be called a nucleon

 

a. electron

b. proton

c. neutron

d. proton and neutron

answer

 

 

 

 

d. proton and neutron

question

heaviest of the three particles

 

a. electron

b. proton

c. neutron

d. proton and neutron

answer

 

 

 

c. neutron

question

What element has: 5 protons, 5 electrons, and 6 neutrons?

 

a. 9/4 Be

b. 12/6 C

c. 1/1 H

d. 11/5B

answer

 

 

 

d. 11/5 B

question

Compare: 40/20 CA and 41/19 K

 

a. same number of subatomic particles (60)

b. same number of neutrons (20)

c. same number of subatmoc particles (61)

d. same number of neutrons (21)

answer

 

 

 

a. same number of subatomic particles (60)

question

Compare: 30/14 Si and 32/16 S

 

a. same number of subatomic particles (16)

b. same number of neutrons (16)

c. same number of subatomic particles (48)

d. same number of neutrons (18)

answer

 

 

 

b. same number of neutrons (16)

question

Compare: 23/11 Na and 24/12 Mg

 

a. same number of subatomic particles (24)

b. same number of neutrons (11)

c. same number of subatmoc particles (34)

d. same number of neutrons (12)

answer

 

 

 

d. same number of neutrons (12)

question

24/12 X amd 26/12 Q

 

a. isotopes

b. isobars

c. neither

answer

 

 

 

a. isotopes

question

71/31 X amd 71/32 Q

 

a. isotopes

b. isobars

c. neither

answer

 

 

 

b. isobars

question

56/25 X amd 54/24 Q

 

a. isotopes

b. isobars

c. neither

answer

 

 

 

 

c. neither

question

57/27 X amd 60/27 Q

 

a. isotopes

b. isobars

c. neither

answer

 

 

 

a. isotopes

question

Calculate atomic mass of Titanium given:

Ti-46 = 7.93% (45.95263 amu)

Ti-47 = 7.28% (46.9518 amu)

Ti-48 = 73.94% (47.94795 amu)

Ti-49 = 5.51% (48.94787 amu)

Ti-50 = 5.34% (49.9448 amu)

answer

47.88 amu

 

0.0793 x 45.95263 = 3.644

0.0728 x 46.9518 = 3.418

0.7394 x 47.94795 = 35. 453      =  47.879

0.0551 x 48.94787 = 2. 697

0.0534 x 49.9448 = 2. 667

question

In which of the following pairs of numbers does each member of the pair contain the same number of significant figures?

a. 22.30 and 22.3

b. 314 and 3.14

c. 63,000 and 6,300

d. more than one correct reponse

e. no correct reponse

answer

d. more than one correct reponse

 

both b. and c. contain the same number of signifcant figures b. (3) and c. (2)

question

Which of the following statements concerning the significatn of zeros in measured numbers correct?

a. leading zeros are alway significant

b. confinined zeros are always significant

c. trailing zeros are never significant

d. more than one correct anwser

e. no correct anwser

answer

 

 

 

b. confined zeros are alway significant

question

In which of the following measured numbers are all of the zeros significant?

a. 0.000003140

b. 3.0101

c. 360, 031, 010

d. more than one anwser is correct

e. no correct response

answer

 

 

 

b. 3.0101

question

In which o the following cases is the given number correctly rounded to three significant figures?

a. 241,000 becomes 241

b. 0.3334 becomes 0.334

c. 42.357 becomes 42.3

d. more than one correct response

e. no correct repsonse

answer

 

 

 

c. 42.257 becomes 42.3

question

In which of the following pairs of numbers do the two members of the pair have the same uncertainty?

a. 3.102 and 5.134

b. 0.20 and 0.200

c. 301,000 and 300,000

d. more than one correct answer

e. no correct response

answer

 

 

a. 3.102 and 5.134

 

question

The calculator anwser obtained from 42.44 x 4.41 x 7.00 is 1013.0428. This anwser:

a. is correct as written

b. should be rounded to 1013

c. should be rounded to 1010

d. more than one correct response

e. no correct response

answer

 

 

 

c. should be rounded to 1010

question

The correct answer obtained from adding the measurements 8.1, 3.14, and 97.143 contains:

a. 2 significant figures

b. 3 significant figures

c. 4 significant figures

d. 5 significant figures

e. no correct response

answer

 

 

 

a. 2 significant figures

question

Which problem contains only 1 significant figure?

a. 4.0 x (2.3 + 4.5)

b. 3.0 x (3.7 - 3.4)

c. 7.02 x (0.0001 + 0.011)

d. more than one correct response

e. no correct response

answer

 

 

 

c. 7.02 x (0.0001 + 0.011)

question

Given that 7 is exact number and 0.13 is a measured number, for which of the following problems does the answer contian 3 significant figures?

a. 7 x 0.13

b. 7/0.13

c. 7 + 0.13

d. more than one correct response

e. no correct response

answer

 

 

e. no correct response

 

all responses only contain 2 significant figures

question

In which of the following cases is the given number correctly converted to scientific notation?

a. 321,000 becomes 3.21 x10^4

b. 0.00300 becomes 3 x10^-3

c. 31.040 becomes 3.104 x10^1

d. more than one correct response

e. no correct response

answer

 

 

 ? e. no correct reponse ?

 

a. is incorrect, b. and c. have incorrect significant figures

question

In which of the following pairs of numbers do the two members have the same uncertainty?

a. 4.80 x10^5 and 4.80 x10^6

b. 3.21 x10^-4 and 3.2 x10^-3

c. 3 x10^-5 and 3.2211 x10^-1

d. more than one correct response

e. no correct response

answer

 

 

? d. 3 x10^-5 and 3.2211 x10^-1 ?

 

0.00003

0.32211

±0.00001

question

In which of the following pairs of number are the two numbers totally equivalent?

a. 3200 and 3.200 x10^3

b. 0.20 and 2.0 x10^-1

c. 4713.0 and 4.7130 x10^3

d. more than one correct response

e. no correct response

answer

 

 

d. more than one correct response

 

all responses are totally equivalent

question

Which of the following metric system prefixes is correctly pair with its mathematical meaning?

a. milli- and 10^-2

b. micro- and 10^-6

c. giga- and 10^-9

d. more than one correct response

e. no correct response

answer

 c. micro- and 10^-6

 

 

a. milli- (10^-3) and 10^-2 (centi-)

c. giga- (10^9) and 10^-9 (nano-)

 

question

In which of the following sequences are the metric system prefixes listed in decreasing size?

a. mega-, giga-, kilo-

b. nano-, micro-, milli-

c. pico-, centi-, deci-

d. more than one correct response

e. no correct repsonse

answer

 

 

 

e. no correct response

Get an explanation on any task
Get unstuck with the help of our AI assistant in seconds
New