AP Chem review

When a student adds 30.0 mL of 1.00 M HCl to 0.56g of powered Fe,

0.01 mol H2

The above reaction occurs when an excess of 6M HCl (aq) solution is added to 100mL of NaOCl

0.10 M

Beaker X and beaker Y each contain 1.0 L of solution, as shown above. A student combines

0.50M Mg(NO3)2 and AgCl(s)

Ethanol, C2H5OH is a renewable fuel produced from the fermentation

1, 3

According to the following reaction, when 0.400 of CS2

1.20 mol

lithium and nitrogen react in a combination

1.8 mol

For an experiment, a student needs 100.0 mL of

100 mL volumetric flask

The molecule described by the figure above has an average bond length of

154 pm

How many grams of hydrogen are contained in 138 grams

18 grams

The mass of element Q found in 1.00 mole of each of four

19.0

Whent the equation below is balanced, and the coefficiants

2

According to the following reaction, what is the total number of moles

2.00 mol

A 6.0 mol sample of C3H8 and a 20 mol

20.0 mol

Based on periodic trends and the data in the table shown, which of the

242 pm, 419 kj/mol

How many protons, neutrons, electrons are in Fe

26, 30, 26

A 0.35 g sample of Li(s) is placed in an Erlenmeyer flask containing 100 mL of water at 25 C

2Li(s) + 2H2O(l) --> 2Li+(aq) + 2OH-(aq) + H2(g) The one with 3 products

The bond energy for the molecule described by the figure below is

347 kj/mol

Which of the following statements is false

A fluorine atom has a smaller first ionization energy than an oxygen atom

A mixture of CO(g) and O2(g) is placed in a container as shown above

A one OO

To gravimetrically analyze the silver content of a piece

Adding a solution containing an anion that forms an insoluble salt with only one of the metal ions

Which of the following correctly identifies which has the higher first ionization energy

Ar, because of its higher effective nuclear charge

The first five ionization energies of a second-period element are listed in the table above.

B, because it has 3 valence electrons

A covalent compound is found to have an empirical formula of C2H5O

C4H10O2

The compound CCl4 is nonflammable and was once commonly used in fire extinguishers

CBr4

On the basis of the information above, which of the following arranges the binary compounds in order of increasing bond polarity

CH4 < SiCl4 < SF4

A sample of a compound that contains only elements C, H, and N

CH5N

The photoelectron spectra of the 1s electrons of two

Ca 2+ because its nucleus has two more protons than the nucleus of Ar has

What is the empirical formula of an oxide of Cr

CrO3

For elements Cs, F, and Cl, the order of incring electronegativity

Cs<Cl<F

The complete photoelectron spectra of neutral atoms of two

Element Y has a greater nuclear charge than element X does

Which of the following has the bonds arranged in order of decreasing polarity

H-F > N-F > F-F

The potential energy as a function of internuclear distance for three diatomic molecules, X2

H2, N2, O2

When a student adds 30.0 mL of 1.00 M HCl to 0.56g of powered Fe

HCl is in excess and 0.010 mol of HCl remains unreacted

The table above shows the first ionization energy and atomic radius of several

There is repulsion between paired elctrons in oxygen's 2p orbitals

During the course of the experiment, which of the following happens to the NO3- ions

They remain dissolved in the solution

The BF3 molecule is nonpolar whereas the NF3 molecule is polar. Which of the

Unlike BF3, NF3 has a nonplanar geometry due to an unshared pair of electrons on the N atom

In a paper chromatography experiment, a sample of a pigment is separated

Y is more polar than X

When the reaction below occurs, does the hybridization of the carbon atoms change

Yes; it changes from sp to sp2

Based on the data in the table below, which of the

Zn>Ca>Ba because the smaller ions are more electronegative

The mass spectrum of an average sample of a pure element

Zr

The mass spectrum of an average sample of a pure element is shown in the figure above. Which of the

Zr

When ignited, a uranium compound burns with a green flame

radio waves

In the reaction represented above, what is the hybridization of the C atom before and after

sp2 sp3

Which of the following could be the identity of a white crystalline solid the exihibits

NaOH(s)

Atoms of which element are reduced in the reaction above

O in Na2O2; each atom gains one electron

For elements Na, O, Cl the order of incr atomic radius

O<Cl<Na

In the reaction represented above, the number of MnO4- ions that react must be equal to which of the

One-fifth the number of Fe 2+ ions that are consumed

The decomposition of H2O2(aq) is represented by the equation above. Which of the following identifies the element(s) being oxidized and reduced

Oxygen is both oxidized and reduced

A sample containing atoms of C and F were analyzed using x-ray photoelectron spectroscopy

Peak X, because F has a greater nuclear charge than C has

Based on the information above and periodic trends, which of the following is the best hypothesis

Rb will form Rb2O, Rb2O2, and RbO2

If a pure sample of an oxide of sulfur contains 40 percent sulfur and 60 percent oxygen by mass, then the empirical formula of the oxide is

SO3

A student is given a sample of a pure, white crystalline substance. Which of the

Testing the electrical conductivity of an aqueous solution of the substance

The mass spectrum of element X is presented in the diagram above. Based on

The atomic mass of X is between 90 and 92

Which of the following diagrams best represent the AgNO3 solution before the reaction occurs

The diagram with O- facing NO3- and H+ facing Ag+

A student mixes dilute AgNO3(aq) with excess NaCl(aq) to form AgCl(s)

The diagram with no Ag and 2 NO3

For element X represented above, which of the following is the most likely explanation for the large

The electron removed during the third ionization is, on average, much closer to the nucleus than the first two electrons removed were

A student performed an analysis to determine the amount of AgNO3 in a solution

The precipitate was not rinsed with deionized water before drying

M+ is an unknown metal cation with a 1+ charge. A student dissolves

KCl

What is the identity of the metal Chloride

KCl

The lattice energy of a salt is related to the energy required to separate

Mg 2+(g) and O 2-(g)

According to the information in the table above, a 1.00 gram sample

MgO

Which of the following Lewis electron-dot diagrams represents the molecule

NF3

On the basis of molecular structure and bond polarity, which of

NH3

NH3 reacts with BF3 to form a single species. Which of the

NH3BF3, most nonpolar diagram