Chem 161 Final

How many moles of Cs are contained in 595kg of Cs?

4.48 x 10^3 Moles Cs

How many molecules of N2O4 are in 76.3g N2O4? The molar mass of N2O4 is 92.92 g/mol.

4.99 x 10^23 N2O4 Molecules

Give the formula for sulfurous acid.

H2SO3

Give the ground state electron configuration for Pb.

[Xe] 6s^2 4f^14 5d^10 6p^2

Give the possible values for ml for a d orbital.

-2,-1,0,1,2

Determine the energy change associated with the transition from n=3 to n=2 in the hydrogen atom.

-3.03x10^-19 J

For n=3, what are the possible sublevels?

0,1,2

How many moles of N2O4 are in 76.3 N2O4? The molar mass of N2O4 is 92.02 g/mol.

0.829moles

Determine the mass of a metal cube that has a density of 12.7 g/ml and a volume of 87.63mL

1.11 x 10^3 g

Calculate the mass in (in mg) of 4.82 x 10^22 atoms of sodium

1.84 x 10^3 mg

Calculate the wavelength of light emitted from a mol of photons as they transition from n=6 to n=3 in the hydrogen atom.

1093nm

Determine the volume of hexane that contains 5.33 x 10^22 molecules of hexane. The density of hexane is 0.6548 g/mL and its molar mass is 86.17 g/mol.

11.6mL

What answer should be reported, with the correct number of significant figures, for the following calculation? (433.621 - 333.9) x 11.900

11.9 x 10^3

Convert 250 Fahrenheit into Celsius.

121 Celsius

What answer should be reported, with the correct number of significant figures, for the following calculation? (965.43 x 3.911) + 9413.4136

13189

Give the structure for sodium perchlorate

NaClO4

Give the name for HNO3

Nitric Acid

Give the ground state electron configuration for Se^2-

[Ar] 4s^2 3d^10 4p^6

Give the ground state electron configuration for Se

[Ar]4s^2 3d^10 4p^4

Give the ground state electron configuration for Cd

[Kr] 5s^2 4d^10

Give the complete electronic configuration for Ca2+

1s^2 2s^2 2p^6 3s^2 3p^6

Give the complete electronic configuration for S2-

1s^2 2s^2 2p^6 3s^2 3p^6

What value of l is represented by a d orbital?

2

Calculate the molar mass of Al (C2H3O2)3

204.13 g/mol

Calculate the molar mass for Mg (ClO4)2

223.21 g/mol

Determine the volume of an object that has a mass of 455.6 g and a density of 19.3 g/cm^3.

23.6 mL

How many orbitals are associated with an atom when n=5?

25

An element has three stable isotopes with masses of 27.977 amu, 28.976 amu, and 29.973 amu. The heavier two isotopes have an abundance of 4.68% and 3.09%, respectively. What is the mass of the element?

28.085amu

Calculate the mass percent composition of sulfur in Al2 (SO4)3.

28.12%

Calculate the energy f the green light emitted, per photon, by a mercury lamp with a frequency of 5.49x10^14 Hz.

3.64x10^-19J

How many atoms of carbon are contained in 47.6g of Al2 (CO3)3? The molar mass of Al2 (CO3)3 is 233.99 g/mol.

3.68 x 10^23 C atoms

A cube has a 45.2 cm length. What is the volume of the cube?

9.23 x 10^4 cm^3

An atom that has lost an electron is a

A Cation

A substance composed of two of more elements in a fixed, definite proportion is

A compound

Determine the name for CoCl2 * 6H2O. (Co forms several ions)

Cobalt (II) Chloride Hexahydrate

What element does X represent? 80 X 35

Bromine

How many iron atoms are contained in 354 g of iron?

3.82 x 10^24 Fe atoms

Calculate the wavelength (in nm) of the blue light emitted by a mercury lamp with a frequency of 6.88 x 10^14 Hz.

436nm

Give the number of core electrons for Cd.

46

What is the maximum number of d orbitals that are possible in a given shell?

5

What is the mass (in kg) of 6.89 x 10^25 molecules of CO2? The molar mass of CO2 is 44.01 g/mol.

5.04kg

Calculate the frequency of the green light emitted by a hydrogen atom with a wavelength of 486.1nm.

6.17x10^14 s^-1

What species is represented? p+=47 n=62 e-=46

Ag+

The vertical height of a wave is called:

Amplitude

Which of the following quantum numbers describes the shape of an orbital?

Angular Momentum Quantum Number

Determine the molecular formula of a compound that has a molar mass of 183.2 g/mol and an empirical formula C2H5O2.

C6H15O6

The element that corresponds to the electron configuration 1s^2 2S^2 2p^6 3s^2 3p^6 4s^1 3d^5 is:

Chromium

When filling degenerate orbitals, orbitals, electrons fill them singly first, with parallel spins is known as:

Hund's Rule

Determine the electron geometry and molecular geometry of ICl2.

Electron Geometry: Trigonal Bipyramidal Molecular Geometry: Linear

Determine the electron geometry and molecular geometry of BCl3

Electron Geometry: Trigonal planar Molecular Geometry: Trigonal Planar

The number of cycles that pass trough a stationary point is called:

Frequency

A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 1.71 g/ml, 1.73 g/ml, 1.67 g/ml, 1.69 g/ml. IF the actual value for the density of the sugar solution is 1.40 g/ml, which statement below best describes her results? (Precision and Accuracy)

Her results are precise, but not accurate

What species is represented by the following information? P+= 12 n= 14 e-= 10

Mg 2+

Determine the empirical formula for a compound that is found to contain 10.15mg P and 34.85mg Cl.

PCl3

The atomic number (Z) is the number of _____ found in the nucleus of an atom.

Protons

Identify the description of an atom.

Protons and neutrons in nucleus; electrons in orbitals.

Identify the charges of the protons, neutrons, and electrons.

Protons= +1 Neutrons= 0 Electrons= -1

Which of the following types of waves are considered electromagnetic radiation? a.) Radio Waves b.) Sound Waves c.) Microwaves d.) Ocean Waves e.) Mechanical Waves

Radio Waves, Microwaves

Give the name for NaHSO3

Sodium Hydrogen Sulfite

Identify the element that has a ground state electronic configuration of [Kr] 5s^2 4d^5

Tc

Determine the name for P4O10

Tetraphosphorus Decoxide

The mass number is equal to:

The sum of the number of protons and neutrons

Give the name for SnO

Tin (II) Oxide

Write the name for Sn (SO4)2. (Sn forms several ions)

Tin (IV) Sulfate

Determine the name for TiCO3. (Titanium forms several ions)

Titanium (II) Carbonate

Molecules can be described as:

Two or more atoms chemically joined together

Which of the following colors of electromagnetic radiation has the shortest wavelength?

Violet

All of the following are SI base units of measurement, EXCEPT a.) Meter b.) Mole c.) Gram d.) Kelvin e.) Second

c.) Gram

Determine the number of protons, neutrons and electrons in the following 25 X 12

p+= 12 n= 13 e- =12

Determine the number of protons, neutrons and electrons in the following, 40 X 18

p+= 18 n=22 e-=18