Exam #3 Review

If 6.70 mol of NO₂ occupy 33.3 L, how many liters will 3.76 mol of NO₂ occupy at the same temperature

    and pressure?

PV=nRT

• 18.7L

• 59.3L

• 22.4L

• 1130L

A mixture of He, Ne, and Ar has a pressure of 27.9 atm at 28.0°C. If the partial pressure of He is 1.92 atm and the partial pressure of Ar is 2.10 atm, what is the partial pressure of Ne?

P(total) = Pa + Pb + Pc + ...

• 27.9 atm

• 4.02 atm

• 23.9 atm

• 0.885 atm

Which of the following types of radiation has the highest energy?

• IR

• UV

• Gamma

• Blue light

What is the frequency of green light with a wavelength of 486 nm?

wavelength = speed of light / frequency

speed of light = 3x10⁸ meters

• 4.86 Hz

• 6.17x10¹⁴ Hz

• 1.46x10¹¹ Hz

• 1.62x10^-15 Hz

What information is most important in determining the size of an orbital?

• x

• n

• l

• m_l

What is the maximum number of electrons in an atom that can have the quantum numbers n=4 ℓ=2?

• 2

• 4

• 8

• 10

What element is represented by the valence shell electron configuration 3d¹⁰4s¹? 

• Cd

• Zn

• Cu

• K

The atom with valence-shell configuration 4s²4p⁵ will probably

• lose 5 electrons

• gain 3 electrons

• gain 2 electrons

• gain 1 electron

What is the molar mass of a gas with a density of 1.83 g/L at 0.750 atm and 27.0°C?

PV = nRT OR PV = (mass/molar mass)RT

• 5.41 g/mol

• 60.06 g/mol

• 20.3 g/mol

• 185 g/mol

An open flask sitting in a lab fridge looks empty, but it is actually filled with a mixture of gases called air. If the flask volume is 5.00 L, and the air is at standard temperature and pressure, how many gaseous molecules does the flask contain?

PV=nRT

Na = 6.023x10²³ molecules/mol

• 6.02x10²³

• 1.86x10²²

• 1.34x10²³

• 0.223