Chemistry Constants (Inorganic, Nuclear)

Question 1

Half-Life of Tritium

Answer 1

12.3 years

Question 2

Half-life of Rubidium-87

Answer 2

4.81 E10 years

Question 3

Half-life of Rubidium-83

Answer 3

86.2 days

Question 4

Half-life of Rubidium-82

Answer 4

1.26 minutes

Question 5

Half-life of Americium-241

Answer 5

432 years

Question 6

Half-life of Uranium-238

Answer 6

4.52 E9 years

Question 7

Half-life of Uranium-235

Answer 7

704 E6 years

Question 8

Half-life of Potassium-40

Answer 8

1.26 E9 years

Question 9

Half-life of Cobalt-60

Answer 9

5.2 years

Question 10

Half-life of Iodine-131

Answer 10

8 days

Question 11

Half-life of Bismuth-83

Answer 11

1.03 years

Question 12

Half-life of C-14

Answer 12

5730 years

Question 13

Number of disintegrations of Carbon-14 for living organisms

Answer 13

15.3 disintegrations of C-14 per minute per gram of C-12

Question 14

Value of 1 amu in grams

Answer 14

1 amu = 1.6606 E-24 g

Question 15

Value of 1 amu in MeV

Answer 15

931.5 MeV

Question 16

Value of 1 eV in Joules

Answer 16

1 eV = 1.6022 E-19 J

Question 17

Value of 1 rem in Sv

Answer 17

1 rem = 0.01 Sv (Sievert)

Question 18

Value of 1 Ci in Bq

Answer 18

1 Ci = 3.7 E10 Bq

Question 19

Value of 1 rem in Sv

Answer 19

1 rem = 0.01 Sv (Sievert)

Question 20

Value of 1 rad in Gy

Answer 20

1 rad = 0.01 Gy (gray)

Question 21

Equivalent of 1 R (Roentgen) in SI units

Answer 21

2.58 E-4 C/kg

Question 22

Mass of proton in amu

Answer 22

1.0073 amu

Question 23

Mass of neutron in amu

Answer 23

1.0087 amu

Question 24

Relative biological effectiveness (Q) of x-rays, gamma rays, beta particles

Answer 24

1

Question 25

Relative biological effectiveness (Q) of slow neutrons

Answer 25

3

Question 26

Relative biological effectiveness (Q) of protons and fast neutrons

Answer 26

10

Question 27

Relative biological effectiveness (Q) of alpha particles

Answer 27

20

Question 28

Magic numbers for protons

Answer 28

2, 8, 20, 28, 50, 82, 114

Question 29

Magic numbers for neutrons

Answer 29

2, 8, 20, 28, 50, 82, 126, 184

Question 30

Ebullioscopic and Cryoscopic Constants of Water

Answer 30

Kb = 0.52
Kf = 1.86

Question 31

Ebullioscopic and Cryoscopic Constants of Benzene

Answer 31

Kb = 2.53
Kf = 5.12

Question 32

Ebullioscopic and Cryoscopic Constants of Camphor

Answer 32

Kb = 5.95
Kf = 37.7

Question 33

Ebullioscopic and Cryoscopic Constants of Ethanol

Answer 33

Kb =1.22
Kf = 1.99

Question 34

Ebullioscopic and Cryoscopic Constants of Methanol

Answer 34

Kb = 0.80
Kf = —

Question 35

Ebullioscopic and Cryoscopic Constants of Acetic Acid

Answer 35

Kb = 2.93
Kf = 3.90

Question 36

Energy supplied by the sun

Answer 36

1000 J/m²-s

Question 37

Wavelength of Various Colors

Answer 37

V (390-450 nm)
B (450-500 nm)
G (500-550 nm)
Y (550-600 nm)
O (600-650 nm)
R (650-700 nm)

Question 38

Concentrated acetic acid

Answer 38

17.4 M CH₃COOH

Question 39

Concentrated hydrofluoric acid

Answer 39

28.9 M HF

Question 40

Concentrated hydrochloric acid

Answer 40

12.1 M HCl

Question 41

Concentrated hydrobromic acid

Answer 41

8.9 M HBr

Question 42

Concentrated ammonia

Answer 42

15.3 M NH₃

Question 43

Concentrated potassium hydroxide

Answer 43

11.7 M KOH

Question 44

Concentrated sodium hydroxide

Answer 44

18.9 M NaOH

Question 45

Standard molar entropy of vaporization according to Trouton’s Rule (applicable only for liquids that do not possess hydrogen bonding)

Answer 45

ΔSvap = 87 J/mol-K

Question 46

Electronegativity difference of nonpolar covalent bonds

Answer 46

< 0.5

Question 47

Electronegativity difference of polar covalent bonds

Answer 47

0.5 to 1.9

Question 48

Electronegativity difference of ionic bonds

Answer 48

> 1.9

Question 49

Ebullioscopic and Cryoscopic constants of cyclohexane

Answer 49

Kb = 2.79
Kf = 20.0