Mass AP Chem Review
Beginning with 48 moles of H2, how many moles of Cu(NH3)4Cl2(aq) can be obtained if the synthesis of Cu(NH3)4Cl2(aq) is carried out through the following sequential reactions? Assume that 50% yield of product(s) is (are) obtained in each reaction. i. 3H2(g) + N2(g) --> 2NH3(g) ii. 4NH3(g) + CuSO4(aq) --> Cu(NH3)4SO4(aq) iii. Cu(NH3)4SO4 + 2NaCl--> Cu(NH3)4Cl2(aq) + Na2SO4(aq) a- 1 b- 2 c- 4 d- 8 e- 12
a, 1
Which set of quantum numbers is not allowed? a- (2, 2, 1, 1/2) b- (3, 2, 0, -1/2) c- (4, 3, -3, 1/2) d- (5, 4, 4, 1/2) e- (6, 2, -1, 1/2)
a, (2, 2, 1, 1/2)
What is the maximum amount of water that can be prepared from the reactoin of 20.0 g of HBr with 20.0 g of Ca(OH)2? 2HBr + Ca(OH)2 --> CaBr2 + 2H2O a- (20/81)(2/2)(18) g b- (20/74)(2/2)(18) g c- (20/81)(2/1)(18) g d- (20/74)(2/1)(18) g e- (20/74)(1/2)(18) g
a, (20/81)(2/2)(18) g
How many milliliters of 0.40 M FeBr3 solution would be necessary to precipitate all of the Ag + from 30 mL of a 0.40 M AgNO3 solution? FeBr3(aq) + 3AgNO3(aq) --> Fe(NO3)3(aq) + 3AgBr(s) a- 10 mL b- 20 mL c- 30 mL d- 60 mL e- 90 mL
a, 10 mL
The mineral chromite, FeCr2O4, consists of a mixture of iron(II) oxide and chromium(III) oxide. What is the most likely ratio of iron (II) oxide to chromium(III) oxide in chromite? a- 1:1 b- 1:2 c- 2:3 d- 3:2 e- 2:1
a, 1:1
The outermost electron in a ground state potassium atom can be described by which of the following sets of four quantum numbers? a- 4, 0, 0, 1/2 b- 4, 1, 0, 1/2 c- 4, 1, 1, 1/2 d- 5, 0, 0, 1/2 e- 5, 1, 0, 1/2
a, 4, 0, 0, 1/2
Which species has the shortest bond length? a- CN - b- O2 c- SO2 d- SO3 e- CO2
a, CN-
Which pair of atom should form the most polar bond? a- F and B b- C and O c- F and O d- N and F e- B and N
a, F and B
Magnesium nitride reacts with water to form ammonia and magnesium hydroxide. Besides water, this statement refers to which chemical formulas? a- Mg3N2, NH3 and Mg(OH)2 b- Mg(NO3)2, NH4+, and MgH2 c- Mg(NO3)2, NH3 and MgH2 d- Mg(NO2)2, NH4+ and Mg(OH)2 e- Mg3N2, NH3 and MgOH
a, Mg3N2, NH3, & Mg(OH)2
Which is a collection of only molecular compounds? a- NO, CS2, PCl3, HBR b- NaNO3, CCl4, CuS c- Ar, NH3, SF4, PCl5 d- Cl2, CCl4, NO2, SF6 e- H2O, CaO, CO, CO2
a, NO, CS2, PCl3, HBR
Which statement is true of a measured pressure of a sample of hydrogen gas collected over water at constant temperature? a- The measured pressure is greater than the pressure of dry hydrogen b- the measured pressure is less than the pressure of dry hydrogen c- the measured pressure is equal to the pressure of dry hydrogen d- the measured pressure varies inversely with the pressure of dry hydrogen e- the measured pressure is not related to the pressure of dry hydrogen
a, The measured pressure is greater than the pressure of dry hydrogen
At room temperature and 1 atm pressure the molecules are farthest apart: a- Flourine b- bromine c- iodine d- mercury e- water
a, flourine
Which of the following elements should react most readily with water? a- potassium b- calcium c- sulfur d- oxygen e- magnesium
a, potassium
Cu 2+ + 2e- --> Cu E naught = -0.3 V Fe 2+ + 2e- --> Fe E naught = -0.4 V Based on the reduction potentials given above, what is the reaction potential for the following reaction? Fe 2+ + Cu --> Fe + Cu 2+ a- -0.7 V b- -0.1 V c- +0.1 V d- +0.7 V
a- -0.7 V
An ion containing only oxygen and chlorine is 31% oxygen by mass. What is its empirical formula? a- ClO 1- b- ClO2 1- c- ClO3 1- d- ClO4 1-
a- ClO 1-
In which of the following compounds is the oxidation number of chromium the greatest? a- CrO4 2- b- CrO c- Cr 3+ d- Cr(s)
a- CrO4 2-
When heated in a closed container in the presence of a catalyst, potassium chlorate decomposes into potassium chloride and oxygen gas via the following reaction: 2KClO3(s)--> 2KCl(s) + 3O2(g) If the temperature of the gas is doubled while the volume is held constant, what will happen to the pressure exerted by the gas and why? a- It will also double because the gas molecules will be moving faster b- It will also double becaus the gas molecules are exerting greater force on each other c- It will be cut in half because the molecules will lose more energy when colliding d- It will increase by a factor of 4 because the kinetic energy will be four times greater
a- It will also double because the gas molecules will be moving faster
Based on the particulate drawing of the products for the reaction below, which reactant is limiting for the following reaction and why? (this question has a picture, you'll just have to memorize the answer ig ¯\_(ツ)_/¯) 2K3PO4(aq) + #MgI2(aq)--> Mg3(PO4)2(s) + 6KI(aq) a- The K3PO4, because there are no excess PO4 3- ions after the reaction b- The MgI2, because there are excess Mg 2+ cations remaining after the reaction c- The K3PO4, because it contains a cation that cannot form a precipitate d- The MgI2, becuase it requires more of itself to create the products
a- The K3PO4, because there are no excess PO4 3- ions after the reaction
Which of the following is true for an endothermic reaction? a- The strength of the bonds in the products exceeds the strength of the bonds in the reactants. b- the activation energy is always greater than the activation energy for an exothermic reaction c- energy is released over the course of the reaction d- a catalyst will increase the rate of the reaction by increasing the activation energy
a- The strength of the bonds in the products exceeds the strength of the bonds in the reactants.
How many moles of ozone, O3, could be formed from 96.0 g of oxygen gas, O2 a- 0.500 mol b- 1.00 mol c- 2.00 mol d- 3.00 mol e- 1/19 mol
c, 2.00 mol
A blue line in the atomic emission spectrum of hydrogen has a wavelength of 434 nm. What is the energy of this light per mole of photons? a- (10^6)(6.63)(3.00)(6.02)/(434) kJ/mol b- (10^3)(6.63)(3.00)(6.02)/(434) kJ/mol c- (10^6)(6.63)(3.00)(6.02)/(434) J/mol d- (10^3)(6.63)(3.00)(6.02)/(434) J/mol e- (10^3)(434)(6.02)/(6.63)(3.00) kJ/mol
b, (10^3)(6.63)(3.00)(6.02)/(434) kJ/mol
The percentage of oxygen in C8H12O2 is: a- (16/140)(100) b- (32/140)(100) c- (12/124)(100) d- (140/32)(100) e- (32/124)(100)
b, (32/140)(100)
What is the best estimate of the H-O-H bond angle in H3O+? a- 109.5 degrees b- 107 degrees c- 104.5 degrees d- 116 degrees e- 120 degrees
b, 107 degrees
If C4H10O undergoes complete combustion, what is the sum of the coefficients when the equation is completed and balanced using smallest whole numbers? a- 8 b- 16 c- 22 d- 25 e- 32
b, 16
What mass of water can be obtained from 4.0 g of H2 and 16 g of O2? 2H2(g) + O2(g) --> 2H2O a- 9 g b- 18 g c- 36 g d- 54 g e- 72 g
b, 18 g
What is the maximum number of orbitals in a 4d sublevel? a- 2 b- 5 c- 10 d- 14 e- 18
b, 5
What is the wavelength of light that has a frequency of 6.0 x 10^14 Hz? a- 2000 nm b- 500 nm c- 200 nm d- 2.0 x 10^6 nm e- 5.0 x 10^-7
b, 500 nm
Bromine has just two major isotopes giving it an atomic mass of 79.904 amu. Based on this information, which of the following statements can explain the atomic mass value? a- The isotope, Br-81, is more common than Br-79 b- B-79 and Br-81 exist in about equal proportions c- Br-78 is about twice as abundant as Br-81 d- Br-82 is more abundant than Br-81 e- The two major isotopes of Br have 45 and 46 neutrons
b, B-79 and Br-81 exist in about equal proportions
Which of these molecules is not polar? a- H2O b- CO2 c- NO2 d- SO2 e- NH3
b, CO2
Which formula represents peroxide? a- K2O b- K2O2 c- KO2 d- CaO e- Ca2O
b, K2O2
What are the products when lithium carbonate is heated? a- LiOH + CO2 b- Li2O + CO2 c- LiO + CO2 d- LiC + O2 e- LiO + CO
b, Li2O + CO2
The electrostatic force of attraction is greatest in which compound? a- BaO b- MgO c- CaS d- MgS e- CaO
b, MgO
Which substance will react with water, at room temperature and pressure, to produce hydrogen? a- Mg b- NaH c- HN3 d- NaOH e- NH3
b, NaH
How are the bonding pairs arrange in the best Lewis structures for ozone? a- O-O-O b- O=O-O c- O(triple bond)O-O d- O(triple bond)O=O e- O=O=O
b, O=O-O
For which species are octet resonance structures necessary and sufficient to describe the bonding satisfactorily? a- BCl3 b- SO2 c- CO2 d- BeF2 e- SO4 2-
b, SO2
Which species contains a central atom with sp2 hybridization? a- C2H2 b- SO3 2- c- O3 d- BrI3 e- NH3
b, SO3 2-
Which of the following compounds contains four carbon atoms? a- propane b- butanoic acid c- ethyl methyl ether d- 2-pentanol e- heptanol
b, butanoic acid
The wavelength of electromagnetic radiation is longer when: a- its energy is small and its frequency is large b- its energy is small and its frequency is small c- its energy is large its frequency is large d- its energy is large and its frequency is small e- its energy is large and its amplitude is high
b, its energy is small and its frequency is small
The hybrid orbitals of nitrogen in N2O4 are: a- sp b- sp2 c- sp3 d- dsp3 e- d2sp3
b, sp2
What will happen to the volume of a bubble of air submerged in water under a lake at 10.0 degrees C and 2.00 atm if it rieses to the surface where the temperature is 20.0 degrees C and the pressure is 1.00 atm? a- the volume will increase by a factor of 400 b- the volume will increase by a factor of 2.07 c- the volume will increase by a factor of 2.00 d- the volume will remain the same e- the volume will decrease by a factor of 1.93
b, the volume will increase by a factor of 2.07
... CN- + ...OH- --> ...CNO- + ...H20 + ...e- When the half-reaction above is balanced, what is the coefficient for OH- if all the coefficients are reduced to the lowest whole number? a- 1 b- 2 c- 3 d- 4
b- 2
A gaseous mixture at 25 degrees C contained 1 mole of CH4 and 2 moles of O2 and the pressure was measured at 2 atm. The gases then underwent the reaction shown below. CH4(g) + 2O2(g) --> CO2(g) + 2H2O(g) What was the pressure in the container after the reaction had gone to completion and the temperature was allowed to return to 25 degrees C? a- 1 atm b- 2 atm c- 3 atm d- 4 atm
b- 2 atm
When heated in a closed container in the presence of a catalyst, potassium chlorate decomposes into potassium chloride and oxygen gas via the following reaction: 2KClO3(s)--> 2KCl(s) + 3O2(g) Apporximately how many liters of oxygen gas will be evolved at STP? a- 2.24 L b- 3.36 L c- 4.48 L d- 22.4 L
b- 3.36 L
If solutions of iron(iii) nitrate and sodium carbonate are mixed, what would be the formula of the precipitate? a- Fe3CO3 b- Fe2(CO3)3 c- NaNO3 d- No precipitate would form
b- Fe2(CO3)3
A voltaic cell is created using the following half-cells: (another picture ¯\_(ツ)_/¯) Cr 3+ + 3e- --> Cr(s) E naught = -0.41 V Pb 2+ + 2e- --> Pb(s) E naught = -0.12 V The concentrations of the solutions in each half-cell are 1.0 M. Which of the following occurs at the cathode? a- Cr 3+ is reduced to Cr(s) b- Pb 2+ is reduced to Pb(s) c- Cr(s) is oxidized to Cr 3+ d- Pb(s) is oxidized to Pb 2+
b- Pb 2+ is reduced to Pb(s)
Hydrogen peroxide, H2O2, in the presence of a catalyst decomposes into water and oxygen gas. How many liters of O2 at STP are produced from the decomposition of 34.0 g of H2O2? a- 1.00 b- 5.60 c- 11.2 d- 22.4 e- 44.8
c, 11.2
Magnesium burns in carbon dioxide to produce carbon and magnesium oxide. What is the ratio of carbon to magnesium oxide in the products? a- 1:1 b- 2:1 c- 1:2 d- 2:3 e- 3:2
c, 1:2
The Lewis structure for SeS2 has a total of a- 2 bonding pairs and 7 nonbonding pairs b- 2 bonding pairs and 6 nonbonding pairs c- 3 bonding pairs and 6 nonbonding pairs d- 4 bonding pairs and 5 nonbonding pairs e- 5 bonding pairs and 4 nonbonding pairs
c, 3 bonding pairs and 6 nonbonding pairs
Methanol, CH3OH, burns in oxygen to form carbon dioxide and water. What volume of oxygen is required to burn 6.00 L of gaseous methanol measured at the same temperature and pressure? a- 4.00 L b- 8.00 L c- 9.00 L d- 12.0 L e- 24.0 L
c, 9.00 L
Which metal will not react with aqueous hydrochloric acid? a- Fe b- Al c- Cu d- K e- Ni
c, Cu
Fluorine gas is bubbled through an aqueous solution of calcium bromate. Besides water, this statement refers to which chemical formulas? a- F2 and CaBr2 b- F and Ca Br2 c- F2 and Ca(BrO3)2 d- F2 and CaBrO3 e- F and CaBrO3
c, F2 and Ca(BrO3)2
What is the general formula for an alkaline earth metal hydride? a- MH b- MOH c- MH2 d- M(OH)2 e- M2H
c, MH2
The minteral spinel is an ionic compound containing only the elements magnesium, aluminum, and oxygen. Its simplest formula is probably: a- MgAlO3 b- Mg2AlO4 c- MgAl2O4 d- Mg2Al2O3 e- Mg2AlO3
c, MgAl2O4
The size of the H-N-H bond angles of the following species increases in which order? a- NH3 < NH4+ < NH2- b- NH3 < NH2- < NH4_ c- NH2- < NH3 < NH4+ d- NH2- < NH4+ < NH3 e- NH4+ < NH3 < NH2-
c, NH2- < NH3 < NH4+
The collection of ions, all of whose members do not commonly form precipitates is a- Hg2 2+, Ag+, Pb 2+, Ba 2+ b- PO4 3-, OH -, S 2-, CO3 2- c- NO3 -, Na +, K +, NH4 + d- SO4 2-, Cl -, Br -, I - e- CrO4 2-, Cu 2+, Fe 2+, SO4 2-
c, NO3 -, Na +, K +, NH4 +
A compound contains 48% O, 40.0% Ca, and the remainder is C. What is its empirical formula? a- O3C2Ca2 b- O3CCa2 c- O3CCa d- O3CCa2 e- O2CCa
c, O3CCa
X: 1s2 2s2 2p3 Y: 1s2 2s1 Atoms X and Y have the ground state electronic configuration shown above. The formula for the compound most likely formed from X and Y is a- YX b- Y2X c- Y3X d- YX3 e- Y2X
c, Y3X
A gas is most likely to behave as an ideal gas in which instance? a- at low temperature, because the particles have insufficient kinetic energy to overcome intermolecular attractions b- when the molecules are highly polar, because intermolecular forces are more likely c- at room temperature and pressure, because intermolecular interactions are minimized and the particles are relatively far apart d- at high pressures, because the distance between molecules is likely to be small in relation to the size of molecules e- at high temperatures, because the molecules are always far apart
c, at room temperature and pressure, because intermolecular interactions are minimized and the particles are relatively far apar
Gaseous atoms of which of the following elements are paramagnetic in their ground states? i. Na ii. Mg iii. Al iv. P a- i, ii, iii, iv. b- i, ii, iii only c- i, iii, iv only d- ii only e- iii, iv only
c, i, iii, iv only
Molten AlCl3 is electrolyzed with a constant current of 5.00 amperes over a period of 600.0 seconds. WHich of the following expressions is equal to the maximum mass of Al(s) that plates out? (1 faraday = 96,500 coulombs) a- (600)(5.00)/(96,500)(3)(27.0) g b- (600)(5.00)(3)(27.0)/(96,500) g c- (600)(5.00)(27.0)/(96,500)(3) g d- (96,500)(3)(27.0)/(600)(5.00) g
c- (600)(5.00)(27.0)/(96,500)(3) g
CaCO3(s) + 2H+(aq)--> Ca 2+(aq) + H2O(l) + CO2(g) If the reaction above took place at standard temperature and pressure and 150 g of CaCO3(s) were consumed, what was the volume of CO2(g) produced at STP? a- 11 L b- 22 L c- 34 L d- 45 L
c- 34 L
When heated in a closed container in the presence of a catalyst, potassium chlorate decomposes into potassium chloride and oxygen gas via the following reaction: 2KClO3(s)--> 2KCl(s) + 3O2(g) If 12.25 g of potassium chlorate decomposes, how many grams of oxygen gas will be generated? a- 1.60 g b- 3.20 g c- 4.80 g d- 18.37 g
c- 4.80 g
A strip of metal X is placed into solution containing Y 2+ ions and no reaction occurs. When metal X is placed in a seperate solution containing Z 2+ ions, metal Z starts to form on the strip. Which of the following choices organizes the reduction potential for metals X, Y, and Z from greatest to least? a- X>Y>Z b- Y>Z>X c- Z>X>Y d- Y>X>Z
c- CO3 2- + 2Cu+--> Cu2CO3(s)
Choose the correct net ionic equation representing the reaction that occurs when solutions of potassium carbonate and copper (i) chloride are mixed a- K2cCO3(aq) + 2CuCl(aq)--> 2KCl(aq) + Cu2CO3(s) b- K2CO3(aq) + 2CuCl(aq)--> 2KCl(s) + Cu2CO3(aq) c- CO3 2- + 2Cu+--> Cu2CO3(s) d- CO3 2- + Cu 2+ --> CuCO3(s)
c- CO3 2- + 2Cu+--> Cu2CO3(s)
In which of the following molecules does hydrogen have an oxidation state of -1? a- H2O b- NH3 c- CaH2 d- CH4
c- CaH2
A sample of a hydrate of CuSO4 with a mass of 250 g was heated ntil all the water was removed. The sample was then weighed and found to have a mass of 160 g. What is the formula for the hydrate? a- CuSO4 * 10H20 b- CuSO4 * 7H2O c- CuSO4 * 5H2O d- CuSO4 * 2H2O
c- CuSO4 * 5H2O
A voltaic cell is created using the following half-cells: (another picture ¯\_(ツ)_/¯) Cr 3+ + 3e- --> Cr(s) E naught = -0.41 V Pb 2+ + 2e- --> Pb(s) E naught = -0.12 V The concentrations of the solutions in each half-cell are 1.0 M. If the Cr 3+ solution was replaced with a solution at a higher concentratin, what would happen to the E naught value for the cell? a- It would increase because of the presence of extra Cr 3+ ions, which are able to donate more electrons b- It would increase because the reaction would become more favored c- It would decrease because the additional Cr 3+ ions would drive the equation to the left d- mIt would decrease because the stoichiometric ratio of Cr 3+ ions to Pb 2+ is less than the 1 in the balanced reaction
c- It would decrease because the additional Cr 3+ ions would drive the equation to the left
Oxygen takes the oxidation state -1 in hydrogen peroxide, H2O2. The equation for the decomposition of H2O2 is shown below. 2H2O2--> 2H2O + O2 Which of the following statements about the reaction shown above is true? a- oxygen is reduced, and hydrogen is oxidized b- oxygen is oxidized, and hydrogen is reduced c- Oxygen is both oxidized and reduced d- hydrogen is both oxidized and reduced
c- Oxygen is both oxidized and reduced
For an endothermic reaction, which of the following is true regarding the energy level of the activated complex? a- it is above the energy level of the reactants, but below the energy level of the products b- it is below the energy level of the reactants, but above energy level of the products c- it is above the energy level of both products and reactants d- it is below the energy level of both the products and reactants
c- it is above the energy level of both products and reactants
Cr2O7 2- + 6I- + 14H+ --> 2Cr 3+ + 3I2 + 7H2O Which of the following statements about the reaction given above is NOT true? a- The oxidation number of chromium changes from +6 to +3 b- the oxidation number of iodine changes from -1 to 0 c- the oxidation number of hydrogen changes from +1 to 0 d- the oxidation number of oxygen remains the same
c- the oxidation number of hydrogen changes from +1 to 0
How many grams of baking soda, sodium hydrogen carbonate, are required to completely neutralize 1.00 L of 6.00 M sulfuric acid that has been spilled on the floor? a- (1/6.00)(2/1)(84.0) b- (6.00)(84.0) c- (6.00)(2/1)/(84.0) d- (6.00)(2/1)(84.0) e- (6.00)(1/2)(84.0)
d, (6.00)(2/1)(84.0)
How many electrons in the ground state of a copper atom have quantum numbers n = 3 and 1 = 2? a- 2 b- 6 c- 8 d- 10 e- 18
d, 10
What is the maximum number of electrons that can occupy the 5f sublevel? a- 2 b- 5 c- 10 d- 14 e- 18
d, 14
A mixture of 6.02 x 10^23 molecules NH3 (g) and 3.01 x 10^23 molecules H2O(g) has a total pressure of 6.00 atm. What is the partial pressure of NH3? a- 1.00 atm b- 2.00 atm c- 3.00 atm d- 4.00 atm e- 9.00 atm
d, 4.00 atm
Which is true of the 243Am3+ ion? a- 95 protons, 92 electrons, 243 neutrons b- 95 protons, 98 electrons, 243 neutrons c- 95 protons, 95 electrons, 148 neutrons d- 95 protons, 92 electrons, 148 neutrons e- 92 protons, 95 electrons, 148 neutrons
d, 95 protons, 92 electrons, 148 neutrons
In which species is the F-X-F bond angle the smallest? a- NF3 b- BF3 c- CF4 d- BrF3 e- OF2
d, BrF3
The empirical formula of pyrogallol is C2H2O and its molar mass is 126. Its molecular formula: a- C2H2O b- C4H4O2 c- C2H6O3 d- C6H6O3 e- C2H6O6
d, C6H6O3
A gas has a density of 3.74 g L^-1 at 0 degrees C and a pressure of 1.00 atm. Which gas best fits these data? a- H2 b- He c- N2 d- Kr e- Rn
d, Kr
Which pair of ions should form the ionic lattice with the highest energy? a- Na+ and Br- b- Li+ and F- c- Cs+ and F- d- Li+ and O 2- e- K+ and F-
d, Li+ and O 2-
Which species requires the least amount of energy to remove an electron from the outermost energy level? a- Na + b- He c- F- d- O2 - e- Mg 2+
d, O2 -
Which species has a valid non-octet Lewis structure? a- GeCl4 b- SiF4 c- NH4 + d- SeCl4 e- CO3 2-
d, SeCl4
Which increase when a gas is heated at constant volume? i- pressure ii- kinetic energy of molecules iii- attractive forces between molecules a- i only b- ii only c- iii only d- i and ii only e- ii and iii only
d, i and ii only
What is the name of the process? H2O (s) --> H2O (g) a- condensation b- evaporation c- fusion d- sublimation e- freezing
d, sublimation
For CIF3, the electron-domain geometry of Cl and the molecular geometry are, respectively, a- trigonal planar and trigonal planar b- trigonal planar and bipyramidal c- trigonal bipyramidal and trigonal planar d- trigonal bipyramidal and T-shaped e- trigonal planar and T-shaped
d, trigonal bipyramidal and T-shaped
What is the molecular geometry and polarity of the BF3 molecule? a- trigonal pyramidal and polar b- trigonal pyramidal and nonpolar c- trigonal planar and polar d- trigonal planar and nonpolar e- T-shaped and polar
d, trigonal planar and nonpolar
Cu 2+ + 2e- --> Cu E naught = +0.3 V Zn 2+ + 2e- --> Zn E naught = -0.8 V Mn 2+ + 2e- --> Mn E naught = -1.3 V Based on the reduction potentials given above, which of the following reactions will be favored? a- Mn 2+ + Cu --> Mn + Cu 2+ b- Mn 2+ + Zn --> Mn + Zn 2+ c- Zn 2+ + Mn --> Zn + Mn 2+ d- I accidentally deleted this answer choice and I don't remember what it actually is but d is the answer +0.4
d- +0.4
What is the mass ratio of fluorine to boron in a boron trifluoride molecule? a- 1.8 to 1 b- 3.0 to 1 c- 3.5 to 1 d- 5.3 to 1
d- 5.3 to 1
What is the mass of oxygen in 148 grams of calcium hydroxide (Ca(OH)2)? a- 24 g b- 32 g c- 48 g d- 64 g
d- 64 g
A hydrocarbon was found to be 20% hydrogen by weight. If 1 mole of the hydrocarbon has a mass of 30 g, what is its molecular formula? a- CH2 b- CH3 c- C2H4 d- C2H6
d- C2H6
If equimolar solutions of Pb(NO3)2 and NaCl are mixed, which ion will not be present in significant amounts in the resulting solution after equilibrium is established? a- Pb 2+ b- NO3- c- Na+ d- Cl-
d- Cl-
If solutions containing equal amounts of AgNO3 and KCl are mixed, what is the identity of the spectator ions? a- Ag+, NO3-, K+, and Cl- b- Ag+ and Cl- c- K+ and Ag+ d- K+ nad NO3-
d- K+ nad NO3-
A voltaic cell is created using the following half-cells: (another picture ¯\_(ツ)_/¯) Cr 3+ + 3e- --> Cr(s) E naught = -0.41 V Pb 2+ + 2e- --> Pb(s) E naught = -0.12 V The concentrations of the solutions in each half-cell are 1.0 M. a- electrons flow through the salt bridge from the Pb/Pb 2+ half-cell to the Cr/Cr 3+ half-cell b- Pb 2+ flows to the Cr/Cr 3+ half-cell and Cl- flows to the Pb/Pb 2+ half-cell c- Na + flows to the Cr/Cr 3+ half-cell and Cl- flows to the Pb/Pb 2+ half-cell d- Na + flows to the Pb/Pb 2+ half-cell and Cl- flows to the Cr/Cr 3+ half-cell
d- Na + flows to the Pb/Pb 2+ half-cell and Cl- flows to the Cr/Cr 3+ half-cell
When heated in a closed container in the presence of a catalyst, potassium chlorate decomposes into potassium chloride and oxygen gas via the following reaction: 2KClO3(s)--> 2KCl(s) + 3O2(g) Why is a catalyst present during the reaction? a- A catalyst is necessary for all decompositgion reactions to occur b- A catalyst reduces the bond energy in the reactents, making them easier to activate c- a catalyst reduces the energy differential between the reactants and the products d- a catalyst lowers the activation energy of the overall reaction and speeds it up
d- a catalyst lowers the activation energy of the overall reaction and speeds it up
It takes 37.50 mL of 0.152 M sodium chromate to titrate 25.00 mL of silver nitrate. What is the molarity of the silver nitrate solution? a- (2)(37.50)(0.152)(25.00) b- (25.00)/(37.50)(0.152)(2) c- (0.152)(25.00)/(37.50) d- (37.50)(0.152)/(25.00) e- (2)(37.50)(0.125)/(25.00)
e, (2)(37.50)(0.125)/(25.00)
How many sigma and pi bonds are in O // CH2=CHCH2CCH3? a- 5 sigma and 2 pi b- 8 sigma and 4 pi c- 11 sigma and 2 pi d- 11 sigma and 4 pi e- 13 sigma and 2 pi
e, 13 sigma and 2 pi
Which substance will not form a gas upon mixing with an aqueous acid? a- NaHCo3(s) b- CaS(s) c- Ca(s) d- K2SO3(s) e- Al2O3(s)
e, Al2O3(s)
What is the net-ionic equation for the reaction of aqueous solutions of CaCl2 and Na2CO3? a- Ca 2+ (aq) + 2Cl - (aq) + 2Na+(aq) + CO3 2-(aq) --> CaCo3(s) + 2Na +(aq) + 2Cl-(aq) b- Cl -(aq) + Na+(aq) --> NaCl(s) c- CaCl2(aq) + CO3 2-(aq) --> CaCO3(s) + 2Cl-(aq) d- Ca 2+(aq) + Na2CO3 2-(aq) --> CaCO3(s) + 2Na +(aq) e- Ca 2+(aq) + CO3 2-(aq) --> CaCO3(s)
e, Ca 2+(aq) + CO3 2- (aq) --> CaCO3(s)
Which molecule has the weakest bond? a- CO b- O2 c- CaS d- MgS e- CaO
e, CaO
Which set does not contain a linear species? a- CO2, SO2, NO2 b- H2O, HCN, BeI2 c- OCN-, C2H2, OF2 d- I3-, BrF3, SCN- e- H2S, ClO2-, NH2-
e, H2S, ClO2-, NH2-
Ammonia forms when hydrogen gas reacts with nitrogen gas. If equal number of moles of nitrogen and hydrogen are combined, the maximum number of moles of ammonia that could be formed will be equal to: a- the number of moles of hydrogen b- the number of moles of nitrogen c- twice the number of moles of hydrogen d- twice the number of moles of nitrogen e- two thirds the number of moles of hydrogen
e, two thirds the number of moles of hydrogen
