Chemistry Exam 1 Useful Info

1 inch =

2.54 cm

1 ft =

12 in

1 mi =

5280 ft

5280 ft =

1609 m

electron: mass (m_e) =

9.1093897 × 10^-28 g

charge (e) =

-1.60 × 10^-19 C

Avogadro’s Number:

N_A = 6.022 × 10²³

Constant for Bohr model of H atom:

b = 2.180 × 10^-18 J

Speed of light:

c = 2.998 × 10⁸ m s^-1

Planck’s constand:

h = 6.626 × 10^-34 J s

1 amu =

1.66054 × 10^-24 g

1 J =

1 kg m² s^-2

1 calorie =

4.184 J

1 Newton (N) =

1 kg m s^-2

1 Pa = 1 N m^-2 =

1 kg m^-1 s^-2

1 Pa = ______ = 1 kg m^-1 s^-2

1 N m^-2

_____ = 1 N m^-2 = 1 kg m^-1 s^-2

1 Pa

1 atm in mm Hg and torr

760

1 atm in Pa

101,325

1 atm in bar

1.01325

1 atm in psi (pounds per sq. in)

14.7

R = _____________ = 8.314 J mol^-1 K^-1

0.08206 L atm mol^-1 K^-1

R = 0.08206 L atm mol^-1 K^-1 = __________

8.314 J mol^-1 K^-1

__________ = 0.08206 L atm mol^-1 K^-1 = 8.314 J mol^-1 K^-1

R

T_Kelvin =

T_Celcius + 273.15

E_k =

½ mu²

E_{electrostatic} =

k Q₁Q₂/d

c =

λ v

E (energy of the photon) =

h v

E (energy of the photon) with given wavelength =

E = hc/λ

h

Planck’s constant

v

frequency of the light

Rydberg energy equation: E (energy of electron) =

-(bZ²/n²)

Z

atomic number, or number of protons

n

principal energy level the electron is in

λ

h/mu