Gen Chem Final

NH3 has "trigonal pyramidal" geometry. There are _____ non-bonding domaisn in this molecule

1

Balance the following chemical equation __C3H8 (g)+ ____O2 (g) ----> ___ CO2 (g) + _____H2O (g)

1, 5, 3, 4

Which of the following has the same number of significant figures as the number 1.00310? A. 1 × 106 B. 8.66 C. 5.119 D. 199.791 E. 100

199.791

Write the full ground state electron configuration, and also draw orbital diagram of Ni.

1s2 2s2 2p6 3s2 3p6 4s2 3d8

There should be _____2_____ significant figures in the answer to the following computation. (10.07+7.395)/ 2.5

2

At maximum, an s-subshell can hold __________ electrons, a p-subshell can hold __________ electrons, and a d-subshell can hold __________ electrons.

2, 6, 10

The ion PO4^3- has _________ valence electrons

32

Which of the following is the highest temperature? a.38 *C b. 96 *F c. 302 K d. none of the above e. the freezing point of water

38 *C

. If an electron has a principal quantum number (n) of 3 and an angular momentum quantum number (l) of 1, the subshell designation is __________.

3p

What volume (mL) of a concentrated solution of sodium hydroxide (6.00M) must be diluted to 200. mL to make a 1.5 M solution of sodium hydroxide? (Dilution problem)

50 mL

The wavelength of light emitted from a traffic light having a frequency of 5.75 × 1014 Hz is __________.

522 nm

What is the percentage by mass of lead in Pb(NO3)2 ?

62.6%

An atom of the most common isotope of gold, 197Au, has __________ protons, __________ neutrons, and __________ electrons.

79, 118, 79

Osmium has a density of 22.6 g/cm3. What volume (in cm3) would be occupied by a 21.8 g sample of osmium? Correct sig figs

Answer: 0.965 cm3

Which of the following has the smallest atomic radius? A. Na B. Mg C. P D. Si E. Ar

Ar

of the atoms below, _________ is the least electronegative A. F B. Cl C. Br D. I E. At

At

In which set of elements would all members be expected to have very similar chemical properties? a. P, Se, I b. Cl,Br, Na c. Si,As, Te D. Ne,Na, Mg E. Br. I, At

Br, I, At

A compound contains 40.0 g C, 6.71 g H, and 53.29 g O by mass. The empirical formula of this compound is ______.

CH2O

Of the following gases, which one will have the greatest rate of effusion at a given temperature?

CH4

Which of the following compounds would you expect to be ionic? A. SF6 B. H2O C. H2O2 D. NH3 E. CaO

CaO

Chlorine is much more apt to exist as an anoin than is sodium. This is because ________.

Chlorine has a greater electron affinity than sodium does

Or the ions below only ________ has a noble gas electron configuration. a. S3- b. O2+ c. I + d. K- E. Cl-

Cl-

___________ is isoelectronic with argon. A. F- B. Mg 2+ C. F+ D. Cl- E.Cl+

Cl-

which of the following statements is FALSE? A.Internal energy is a state function B. Enthalpy is an intensive property C. The Enthalpy change for a reaction depends on the state of the reactants and and products D. the enthalpy of a reaction is equal to the heat of the reaction at constant pressure

Enthalpy is an intensive property

Which one of the following hydrogen atoms will form the strongest hydrogen bond with another electronegative atom?

F-H

The ground-state electron configuration of __________ is [Ar]4s23d6.

Fe

q

Heat (J)

Which pair of elements below should be the most similar in chemical properties?

I and Br

The first ionization energies of the elements ___________ as you go from left to right across a period of the periodic table, and ______ as you go from the top to the bottom of a group in the table.

Increase, decrease

Which one of the following is NOT an intensive property? a. pressure b. temperature c. melting point d. mass e. boiling point

Mass

Which of the following bonds has the highest polarity? A. Be-F B. Mg-F C. N-F D. O-F

Mg-F

based on the octet rule, magnesium most likely forms a ___ ion.

Mg^2+

Of the following, __________ contains the greatest number of electrons. A. P3+ B. P C. P2- D. P3- E. P2+

P3-

"No two electrons in the same atom can have identical sets of quantum numbers" is a statement of __________.

Pauli Exclusion Principle

What conditions would always result in an increase in the internal energy of a system?

The system gains heat and has work done on it by the surroundings

which one of the following is a valid statement of Charle's law?

Volume of a gas increases with increase in temperature at constant pressure

W

Work

On a phase diagram, the triple point is where_________.

all three phases are in equilibrium

The kinetic-molecular theory predicts that pressure rises at the temperature a gas increases because___________

both the gas molecules collide more frequently with the wall and the gas molecules collide more energetically with the wall

DeltaT

change in temperature

which one of the following is an exothermic process? A. ice melting B. water evaporating C. boiling soup D. condensation of water vapor E. ammonium thiocyanate and barium hydroxide are mixed at 25 *C: the temperature drops

condensation of water vapor

A combination of sand, salt, and water is an example of __________

heterogeneous mixture

Large intermolecular forces in a substance are manifested by ______

high boiling point

a real gas will behave more like an ideal gas under conditions of _____

high temperature and low pressure

When NaCl dissolves in water, aqueous Na+ and Cl- ions result. The force of attraction that exists between Na+ and H20 is called a(n) _________ interaction

ion-dipole

m

mass (g)

According to the Heisenberg Uncertainty Principle, it is impossible to know precisely both the __________ and the __________ of an electron.

position; momentum

DeltaH for an endothermic process is _____ while DeltaH for an exothermic process is

positive, negative

Isotopes are atoms that have the same number of __________ but differing number of __________.

protons, neutrons

Cs

specific heat

The shape of a liquid's meniscus is determined by _______

the relative magnitude of cohesive forces in the liquid

An empirical formula always indicates __________.

the simplest whole-number ratio of different atoms in a compound

The electron-domain geometry and the molecular geometry of a molecule of the general formula ABn will always be the same if ___________.

there are no lone pairs on the central atom

The energy (J) change associated with an electron transition from n = 3 to n = 1 in a Bohr hydrogen atom is ___________________ J. Show all your works.

∆E = -1.94 x 10-18 J

What is the oxidation number of S in H2SO3?

+4

8.24 m = ________ inches

. 3.24 x 10^2

What is the concentration (M) of a NaCl solution prepared by dissolving 0.16 moles of NaCl in sufficient water to give 350 mL of solution

0.46 M