Chemistry concepts and calculations

1) The composition of the infant body, in terms of water content (by percent tot

1) The composition of the infant body, in terms of water content (by percent total mass), and fat content (by percent total mass), changes dramatically in the firt year of life. T…

1) The compound ZnI 2 is an ionic compound. What are the ions of which it is com

1) The compound ZnI2is an ionic compound. What are the ions of which it is composed? Cation formula Anion formula    2. The compound MgF2 is an ionic compound. What are the ions o…

1) The concentration of hydrogen peroxide, H2O2, in a solution is determined by

1) The concentration of hydrogen peroxide, H2O2, in a solution is determined by titrating a 11.5 mL sample of the solution with permanganate ion, producing manganese(II) ion and o…

1) The condition for a reaction to proceed spontaneously at constant pressure an

1) The condition for a reaction to proceed spontaneously at constant pressure and temperature is that the change in Gibbs free energy (delta-G) for the reaction is less than zero.…

1) The conjugate acid form of an amine is ______. -protonated -deprotonated - ch

1) The conjugate acid form of an amine is ______. -protonated -deprotonated - charged - both a and c are correct 2) If ethyl diethyl amine is placed in a very acidic solution with…

1) The copper-zinc cell has and EMF of 1.100V at standard conditions. What is th

1) The copper-zinc cell has and EMF of 1.100V at standard conditions. What is the EMF when the concentration of Zn2+ on the anode side is 0.05000 M and the concentration of Cu2+ o…

1) The correct formula of nitric acid is __________. A) H2CO3 B) HC2H3O2 C) HNO3

1) The correct formula of nitric acid is __________. A) H2CO3 B) HC2H3O2 C) HNO3 D) H3PO4 2) The conjugate acid of HCO3- is __________. A) CO2 -2 B) CO3 -2 C) H2CO3 D) H3CO3- 3) W…

1) The electrode at which oxidation occurs is called the __________. a. oxidizin

1) The electrode at which oxidation occurs is called the __________. a. oxidizing agent b. cathode c. reducing agent d. anode e. voltaic cell +0.46 +0.617 +1.39 -0.46 +1.21 3) I O…

1) The electrons of which pair of subshells (also called sublevels) make up the

1) The electrons of which pair of subshells (also called sublevels) make up the octet of valence electrons? (a)1p and 2p (b) d and f (c) d and f (d) 3p and 3d (e) None 2) The elec…

1) The end point (or equivalence point ) of your acid (HCl) and base NaOH titrat

1) The end point (or equivalence point ) of your acid (HCl) and base NaOH titration occurred when A) The acid and the base neutralized each other B) The number of moles of H+ = th…

1) The equation A=Ebc directly relates the concentration of a sample, its molar

1) The equation A=Ebc directly relates the concentration of a sample, its molar absorptivity (E), and the absorbance of a sample. Instead of bothering with a standard curve, why n…

1) The equilibrium constant, K p , for the following reaction is 0.497 at 500 K:

1) The equilibrium constant, Kp, for the following reaction is 0.497 at 500 K: PCl5(g) <--- ----->PCl3(g) + Cl2(g) (reversible) Calculate the equilibrium partial pressures o…

1) The equilibrium constant, K, for the following reaction is 1.20×10-2 at 500 K

1) The equilibrium constant, K, for the following reaction is 1.20×10-2 at 500 K. PCl5(g) <----- ------> PCl3(g) + Cl2(g) An equilibrium mixture of the three gases in a 1.00…

1) The equilibrium constant, K, for the following reaction is 1.29×10 -2 at 600

1) The equilibrium constant, K, for the following reaction is 1.29×10-2 at 600 K. COCl2(g) <--- ---> CO(g) + Cl2(g) An equilibrium mixture of the three gases in a 1.00 L fla…

1) The equilibrium constant, K, for the following reaction is 2.02×10-2 at 513 K

1) The equilibrium constant, K, for the following reaction is 2.02×10-2 at 513 K. PCl5(g) <------ ------> PCl3(g) + Cl2(g) An equilibrium mixture of the three gases in a 18.…

1) The equilibrium constant, Kc, for the following reaction is 1.20×10-2 at 500

1) The equilibrium constant, Kc, for the following reaction is 1.20×10-2 at 500 K. PCl5(g) <--- --->PCl3(g) + Cl2(g) Calculate the equilibrium concentrations of reactant and…

1) The estimated proven world oil reserves in 2009 were 1342 billion barrels. Th

1) The estimated proven world oil reserves in 2009 were 1342 billion barrels. The world annual rate of use was 31.1 billion barrels. How long will these reserves last if this rate…

1) The estimated proven world oil reserves in 2009 were 1342 billion barrels. Th

1) The estimated proven world oil reserves in 2009 were 1342 billion barrels. The world annual rate of use was 31.1 billion barrels. How long will these reserves last if this rate…

1) The fertilizer ammonium sulfate (NH4)2SO4. is prepared by the reaction betwee

1) The fertilizer ammonium sulfate (NH4)2SO4. is prepared by the reaction between ammonia (NH3) and sulfuric acid:      2NH3(g)+H2SO4(aq)----->(NH4)2SO4(aq) How many kilograms …

1) The first ionization energies of As and Se are 947 and 941 kj/mol, respective

1) The first ionization energies of As and Se are 947 and 941 kj/mol, respectively.Rationalize these values in terms of electron configurations. ..................................…

1) The flask shown here contains 10.0 mL of HCl and a few drops of phenolphthale

1) The flask shown here contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 0.280 M NaOH. 2) A patient is suspected of having low stomach acid…

1) The following information is given for n -pentane at 1 atm: A 40.00 g sample

1) The following information is given for n-pentane at 1 atm: A 40.00 g sample of liquid n-pentane is initially at –27.30°C. If the sample is heated at constant pressure ( = 1 atm…

1) The following information is given for n -pentane at 1 atm: A 40.00 g sample

1) The following information is given for n-pentane at 1 atm: A 40.00 g sample of liquid n-pentane is initially at –27.30°C. If the sample is heated at constant pressure ( = 1 atm…

1) The following reaction is given: 2NiS 2 +5O 2 (arrow) 2NiO + 4SO 2 When 11.2g

1) The following reaction is given: 2NiS2 +5O2 (arrow) 2NiO + 4SO2     When 11.2g of NiS2 reactwith 5.43g of O2, 4.86g of NiO are obtained.    a) Determine the limiting reactant, …

1) The following reaction was carried out in a 2.00 L reaction vessel at 1100 K

1) The following reaction was carried out in a 2.00L  reaction vessel at 1100 K: C(s)+H2O(g)?CO(g)+H2(g) If during the course of the reaction, the vessel is found to contain 7.00m…

1) The following reaction was carried out in a 2.25 L reaction vessel at 1100 K:

1) The following reaction was carried out in a 2.25 L reaction vessel at 1100 K: C(s)+H2O(g)CO(g)+H2(g) If during the course of the reaction, the vessel is found to contain 8.75 m…

1) The following reaction was performed in a sealed vessel at 786?C : H2(g)+I2(g

1) The following reaction was performed in a sealed vessel at 786?C : H2(g)+I2(g)?2HI(g) Initially, only H2 and I2 were present at concentrations of [H2]=3.90M and [I2]=3.00M. The…

1) The following reaction was performed in a sealed vessel at 786?C : H2(g)+I2(g

1) The following reaction was performed in a sealed vessel at 786?C : H2(g)+I2(g)<------>2HI(g) Initially, only H2 and I2 were present at concentrations of [H2]=3.90M and [I…

1) The following test results were obtained for primary influent to the UCD wast

1) The following test results were obtained for primary influent to the UCD wastewater treatment plant. Determine the concentration of (a)total solids, (b) total volatile solids, …

1) The following test results were obtained for primary influent to the UCD wast

1) The following test results were obtained for primary influent to the UCD wastewater treatment plant. Determine the concentration of (a)total solids, (b) total volatile solids, …

1) The formula for naming the metallic element in an ionic compound is to.. A) u

1) The formula for naming the metallic element in an ionic compound is to.. A) use the element’s name without any changes B) add a prefix that indicates the number of that atom in…

1) The formula weight of the solid, monoprotic acid, \"KHP\" is 204.2 how many m

1) The formula weight of the solid, monoprotic acid, "KHP" is 204.2 how many moles are present in 0.479g? 2) If 25.21 mL of NaOH solution is required to react with 0.555g of KHP, …

1) The freezing point of water is 0.00 °C at 1 atmosphere. If 11.04 grams of alu

1) The freezing point of water is 0.00°C at 1 atmosphere. If 11.04 grams of aluminum chloride, (133.3 g/mol), are dissolved in 196.4 grams of water. The molality of the solution i…

1) The functional groups in an organic compound can frequently be deduced from i

1) The functional groups in an organic compound can frequently be deduced from its infrared absorption spectrum. A hydrocarbon exhibits no bands above 3000 but gives weak absorpti…

1) The half-cell is a chamber in the voltaic cell where one half-cell is the sit

1) The half-cell is a chamber in the voltaic cell where one half-cell is the site of the oxidation reaction and the other half-cell is the site of the reduction reaction. Type the…

1) The heat capacity at constant volume is _____________ the heat capacity at co

1) The heat capacity at constant volume is _____________ the heat capacity at constant pressure. A) always higher than B) always lower than C) always the same of D) sometimes high…

1) The image at right shows electron density solutions for the molecule H 2 in p

1) The image at right shows electron density solutions for the molecule H2 in panels a-e and an energy diagram for the atomic and molecular orbitals in the bottom right panel. The…

1) The image at right shows some of the energy levels of tyrosine. The lower two

1) The image at right shows some of the energy levels of tyrosine. The lower two levels are each occupied by two electrons. From what you know about the absorption spectrum of tyr…

1) The inputs and outputs of the problem are determined in which of the followin

1) The inputs and outputs of the problem are determined in which of the following steps in program development? a) Understand the problem b) Plan and design the logic c) Develop t…

1) The intermolecular force(s) responsible for the fact that CH4 has the lowest

1) The intermolecular force(s) responsible for the fact that CH4 has the lowest boiling GeH4, SnH4 is/are 2) Hydrogen bonding is a special case of 3) What types of intermolecular …

1) The ionization energy of the hydrogen atom is the energy required to remove i

1) The ionization energy of the hydrogen atom is the energy required to remove its electron. Calculate the ionization energy of hydrogen with its electron in the first orbit. Then…

1) The ions S 2- , Cl - , K + ,Ca 2+ , and Sc 3+ have the same total number ofel

1) The ions S2-, Cl-, K+,Ca2+, and Sc3+ have the same total number ofelectrons as the noble gas Argon. How would you expect the radii ofthese ions to vary? Would you expect to see…

1) The iron atom of the heme group is almost entirely enclosed within the protei

1) The iron atom of the heme group is almost entirely enclosed within the protein. 2) By itself, heme is not a good oxygen carrier. It must be part of a larger protein to prevent …

1) The iron atom of the heme group is almost entirely enclosed within the protei

1) The iron atom of the heme group is almost entirely enclosed within the protein. 2) By itself, heme is not a good oxygen carrier. It must be part of a larger protein to prevent …

1) The kinetic energy of a 103 g golf ball traveling at 48.0 m/s is A) 11.9 B) 2

1) The kinetic energy of a 103 g golf ball traveling at 48.0 m/s is A) 11.9 B) 23.7 C) 66 D) 1.3 x 102 of 81.9 km/hr is D778 C 6.00 2) The kinetic energy of a 23.2-g object moving…

1) The label has come off a cylinder of gas in your laboratory. You know only th

1) The label has come off a cylinder of gas in your laboratory. You know only that one species of gas is contained in the cylinder, but you don't know whether it is oxygen, nitrog…

1) The last two visible line observed in the Balmer series are of the wavelength

1) The last two visible line observed in the Balmer series are of the wavelength 434.0 nm and 410.2 nm. For each of the wavelength, a) Determine the frequency associated with the …

1) The main programs of the quality assurance department are: - Risk management,

1) The main programs of the quality assurance department are: - Risk management, in-service and continuing education, safety programs, quality control and peer review. - Human res…

1) The media gateway is responsible for setting up and terminating calls. True o

1) The media gateway is responsible for setting up and terminating calls. True or False 2) An MTA provides all functions except: A) terminating the broadband connection B) convert…

1) The molar solubility of PbI2 is 1.5X10-3 mol/L. PbI2(s) Pb2+(aq) + 2I-(aq) Wh

1) The molar solubility of PbI2 is 1.5X10-3 mol/L. PbI2(s) Pb2+(aq) + 2I-(aq) What is the molar concentration of iodide ion in a saturated PbI2 solution in mol/L? Hint: Consider m…