Important Formulas Flashcards

1
Q

Volume of a cube

A

V = l3

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2
Q

Volume of a box

A

V = l•w•h

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3
Q

Volume of a sphere

A

V = 4/3πr3

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4
Q

Volume of a cylinder

A

V = πr2h

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5
Q

Relationship between Frequency (ν), Wavelength (λ), and the Speed of Light (c)

A

ν = c / λ

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6
Q

Relationship between Energy (E), Frequency (ν), Wavelength (λ), and Planck’s Constant (h)

A

E = hν

E = hc / λ

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7
Q

Relationship between Wavelength (λ), Mass (m), and Velocity (ν) of a Particle

A

λ = h / mν

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8
Q

Energy of an Electron in an Orbital with Quantum Number n in a hydrogen Atom

A

En = -2.18 X 10-18 J (1/n2)

(n = 1, 2, 3, . . .)

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9
Q

Change in Energy That Occurs in an Atom When It Undergoes a Transition between Levels ninitial and nfinial

A

ΔE = -2.18 X 10-18 J (1/n2f - 1/n2i)

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10
Q

Avogadro’s Number

A

6.022 x 1023

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11
Q

Electron Charge

A

1.6022 x 10-19 C

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12
Q

Electron Mass

A

9.1095 x 10-28 g

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13
Q

Faraday Constant (F)

A

96,487 C/mol electron

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14
Q

Gas Constant (R)

A

8.314 J/K • mol (0.08206 L • atm/k • mol)

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15
Q

Planck’s Constant

A

6.626 x 10-34 J•s

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16
Q

Proton Mass

A

1.67252 x 10-24 g

17
Q

Neutron Mass

A

1.67495 x 10-24 g

18
Q

Speed of Light in a Vacuum

A

3.00 x 108 m/s

19
Q

Change in Energy

A

∆E = -Rhc [1/n2f - 1/n2i]

-Rhc = -2.179 x 10-18 J/atom

or

= -1312 kJ/mol