Q: The energy of a photon is $$3.0 \times 10$$^{-19}$$\ \mathrm{J}. $$What is the frequency of this photon?

$$4.5 \times 10$$^{14}$$\ \mathrm{Hz}$$

Question 1

Which of the following is a physical change?

Accepted Answer

Sugar dissolving in water

Question 2

A student measures the volume of water as 1.5 mL in a graduated cylinder marked to the tenth place. How should the student report the measurement?

Accepted Answer

1.50 mL

Question 3

What is the result of the calculation $$1.25 	imes 10^4$ 	imes 1.2 	imes 10^3$ reported to the correct number of significant figures?

Accepted Answer

$$1.5 	imes 10^7$

Question 4

Which of the following is true regarding an ideal gas as described by the Kinetic Molecular Theory?

Accepted Answer

The average kinetic energy of the gas particles is directly proportional to the absolute temperature.

Question 5

A sample of gas occupies 10.0 L at 273 K and 1.0 atm. If the temperature is increased to 546 K and the pressure is increased to 2.0 atm, what is the new volume of the gas?

Accepted Answer

5.0 L

Question 6

The molar enthalpy of combustion $$\Delta H$$ for methane is $$-890\ \mathrm{kJ/mol}. $$How much heat is released when $$0.60\ \mathrm{g}$$ methane is combusted?

Accepted Answer

33.4 kJ

Question 7

Which process is endothermic?

Accepted Answer

Melting of ice

Question 8

How many sigma and pi bonds are in a molecule of hydrogen cyanide, HCN?

Accepted Answer

One sigma bond and two pi bonds

Question 9

Which of the following atoms in its ground state has only one unpaired electron?

Accepted Answer

Fluorine (F)

Question 10

Which set of quantum numbers $$(n, l, m_l, m_s) is $$not possible for an electron in an atom?

Accepted Answer

$$(2, 2, 1, +1/2)$$

Question 11

The energy of a photon is $$3.0 	imes 10$$^{-19}$$\ \mathrm{J}. $$What is the frequency of this photon?

Accepted Answer

$$4.5 	imes 10$$^{14}$$\ \mathrm{Hz}$$

Question 12

Which sublevel has a dumbbell shape and can hold a maximum of 6 electrons?

Accepted Answer

p sublevel

Question 13

Which shorthand configuration correctly represents the electron configuration of Fe$$^{+3}$$?

Accepted Answer

$$[\mathrm{Ar}]\ 3d^5$

Question 14

What is the approximate bond angle in a molecule with trigonal pyramidal geometry?

Accepted Answer

Slightly less than $$109.5^\circ$$

Question 15

Which of the following molecules is polar?

Accepted Answer

SO$$_2$$

Question 16

What is the relationship between wavelength and frequency of electromagnetic radiation?

Accepted Answer

They are inversely proportional.

Question 17

Which sample of gas occupies the largest volume at STP (Standard Temperature and Pressure)?

Accepted Answer

2.0 mol of He

Question 18

If a sample of neon gas has a pressure of 1.5 atm and a volume of 5.0 L, what will the new pressure be if the volume is reduced to 2.5 L at constant temperature?

Accepted Answer

3.0 atm

Question 19

What is the mass of a pure sample containing $$3.01 	imes 10$$^{23}$$ atoms of Gold?

Accepted Answer

59.5 g

Question 20

The specific heat capacity of water is $$4.18\ \mathrm{J/g}^\circ\mathrm{C}. $$How much heat is required to raise the temperature of $$50.0\ \mathrm{g} of $$water from $$20.0^\circ\mathrm{C} to$$ $$30.0^\circ\mathrm{C}$$?

Accepted Answer

2090 J

General Chemistry I: Comprehensive Review and Practice Questions

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