Chemistry concepts and calculations

1) Is the molecule shown chiral? Is it a meso compound? 1) CI Cl 2) Label the mo

1) Is the molecule shown chiral? Is it a meso compound? 1) CI Cl 2) Label the molecule shown as chiral or achiral. 2 Br Ca Ci 3) Label the molecule shown as chiral or achiral. 3) …

1) Is the statement true or false, with respect to the specified reaction in eac

1) Is the statement true or false, with respect to the specified reaction in each case? If a vessel, containing an equilbrium mixture of these gases, is pressurized by adding argo…

1) Is there any errors? 2) Modify this program so that is also gives us: (a) num

1) Is there any errors? 2) Modify this program so that is also gives us: (a) number of grades >= 90 (b) number of grades >= 80 and less than 90 (c) number of grades >= 70…

1) Isotopes of the same element must have the same number of: a) protons. b) ele

1) Isotopes of the same element must have the same number of: a) protons. b) electrons. c) None of the answers d) neutrons. 2) Isotopes of the same element must have different num…

1) It takes __________ moles of carbonic acid to neutralize __________ moles of

1) It takes __________ moles of carbonic acid to neutralize __________ moles of sodium hydroxide. A) 1, 1 B) 2, 2 C) 1, 2 D) 2, 1 2) The reactants in a dry cell are __________. A)…

1) It takes __________ moles of phosphoric acid to neutralize __________ moles o

1) It takes __________ moles of phosphoric acid to neutralize __________ moles of aluminum hydroxide. A) 1, 2 B) 3, 2 C) 1, 1 D) 2, 3 2) An aqueous solution of HCl is called _____…

1) K c increases 2) more C( s ) is produced 3) no further change occurs 4) more

1) Kc increases 2) more C(s) is produced 3) no further change occurs 4) more CH4(g) and C2H2(g) are produced to restore the equilibrium 5) more C2H2(g) is consumed to restore the …

1) Kb for NH3 is 1.8x10^-5. What is the pOH of a .20M aqueous solution of NH4Cl

1) Kb for NH3 is 1.8x10^-5. What is the pOH of a .20M aqueous solution of NH4Cl at 25 degrees Celsius? (Please show work) 2) Determine the pH of a 0.15 M aqueous solution of KF. F…

1) LaNi 5 metal alloys are well known for their ability to reversibly store and

1) LaNi5 metal alloys are well known for their ability to reversibly store and desorb hydrogen at                temperatures just below atmospheric pressure and at room temperatu…

1) Lets assume that, as a preventative measure, you added 2 drops of the Vitride

1) Lets assume that, as a preventative measure, you added 2 drops of the Vitride solution to your bromobenzene/Mg mixture when forming the Grignard reagent, but that your ethereal…

1) Lets assume that, as a preventative measure, you added 2 drops of the Vitride

1) Lets assume that, as a preventative measure, you added 2 drops of the Vitride solution to your bromobenzene/Mg mixture when forming the Grignard reagent, but that your ethereal…

1) Leucomethylene blue is known to be re-oxidized by dissolved O 2 (from the air

1)    Leucomethylene blue is known to be re-oxidized by dissolved O2 (from the air) back to methylene blue. Under acidic conditions the oxidation of leucomethylene blues is slow w…

1) List down the amino acids in the tripeptides, their pK a and pI values. Amino

1) List down the amino acids in the tripeptides, their pKa and pI values. Amino Acid pKa1 (-COOH) pKa2 (-NH2) pKa3 (Side Chain) pI His 1.78 8.97 5.97 7.64 Lys 2.20 8.90 10.28 9.47…

1) List the following sets of quantum numbers in order increasing energy: I . n=

1) List the following sets of quantum numbers in order increasing energy: I . n=4, / = 1, m/=1, ms = +1/2 II. n=3, /=2, m/= -1, ms = +1/2 III. n=4, / =0, m/ = 0, ms = +1/2 A) II &…

1) List the types of intermolecular forces that exist between molecules (or basi

1) List the types of intermolecular forces that exist between molecules (or basic units) in cach of the following species: a) Sodium chloride (NaCI) b) Chloroform (CHiCI) c) Metha…

1) List the types of intermolecular forces that exist between molecules (or basi

1) List the types of intermolecular forces that exist between molecules (or basic units) in cach of the following species: a) Sodium chloride (NaCI) b) Chloroform (CHiCI) c) Metha…

1) Low blood glucose stimulates the release of ACTH which in turn stimulates the

1) Low blood glucose stimulates the release of ACTH which in turn stimulates the release of which of the following hormones from the adrenal cortex? glucagon cortisol epinephrine …

1) M M [ PCl 5 ] = M [ PCl 3 ] = M [ Cl 2 ] = M 2) The equilibrium constant, K c

1) M M [PCl5] = M [PCl3] = M [Cl2] = M 2) The equilibrium constant, Kc, for the following reaction is 55.6 at 698 K. H2(g) + I2(g) 2 HI (g) Calculate the equilibrium concentration…

1) Magnetic resonance imaging (MRI), used in hospitals, operate at a frequency o

1)       Magnetic resonance imaging (MRI), used in hospitals, operate at a frequency of 4.00 x 102 MHz (1 MHz = 106 Hz) Calculate: a) the wavelength b) the energy in joules per ph…

1) Make a data table for your IR. Label the important peaks on your spectrum and

1) Make a data table for your IR. Label the important peaks on your spectrum and in your table. Be sure to signify the functional group corresponding to each wave number. 2) Assum…

1) Many household cleaning products contain oxalic acid H2C2O4, , a diprotic aci

1) Many household cleaning products contain oxalic acid H2C2O4, , a diprotic acid with the following dissociation constants: Ka1=5.9E-2 and Ka2=6.4E-5 Calculate the equilibrium co…

1) Many household cleaning products contain oxalic acid H2C2O4, , a diprotic aci

1) Many household cleaning products contain oxalic acid H2C2O4, , a diprotic acid with the following dissociation constants: Ka1=5.9E-2 and Ka2=6.4E-5 Calculate the equilibrium co…

1) Mass of first empty beaker (beaker 1) 2) Mass of beaker 1 + 200ml 0.2M AgNO3

1) Mass of first empty beaker (beaker 1) 2) Mass of beaker 1 + 200ml 0.2M AgNO3 3) Mass of beaker 1 + 200ml 0.2M AgNO3 + Cu 4) Mass of Cu used 5) Observations of the reaction 6) M…

1) Match each of the substances in the left column with the strongest type of in

1) Match each of the substances in the left column with the strongest type of intermolecular force that it exhibits. water hydrogen chloride carbon tetrabromide hydrogen fluoride …

1) Metallic copper crystallizes in a face-centered cubic lattice, with one Cu at

1) Metallic copper crystallizes in a face-centered cubic lattice, with one Cu atom per lattice point. If the edge length of the unit cell is found to be 362 pm, what is the metall…

1) Methods with 1+ parameter- 0 returns (careful with parameter types); Ex: A me

1) Methods with 1+ parameter- 0 returns (careful with parameter types); Ex: A method that prints your first and last name (receive names as parameter) Public static void printName…

1) Methods with 1+ parameter- 0 returns (careful with parameter types); Ex: A me

1) Methods with 1+ parameter- 0 returns (careful with parameter types); Ex: A method that prints your first and last name (receive names as parameter) Public static void printName…

1) Methods with 1+ parameter- 0 returns (careful with parameter var Example: A m

1) Methods with 1+ parameter- 0 returns (careful with parameter var Example: A method that prints your first and last name (receive names as parameter) Public static void printNam…

1) MgI 2 +Br 2 (yields) MgBr 2 +I 2 a) Which is the excess reactant when 560 g o

1) MgI2 +Br2 (yields) MgBr2 +I2 a) Which is the excess reactant when 560 g of MgI2and 360 g of Br2 react, and what mass remains? b) What mass of I2 is formed in the sameprocess? 2…

1) Mixing silver nitrate and calcium chloride causes silverchloride and calcium

1) Mixing silver nitrate and calcium chloride causes silverchloride and calcium nitrate to be produced. If you have 0.010 molof silver nitrate and 0.010 mol of calcium chloride, c…

1) Name four factors that are under the control of a scientist when he or she wa

1) Name four factors that are under the control of a scientist when he or she wants to increase the rate of a reaction. 2) As scientist, we often talk about wanting to speed react…

1) Name four factors that are under the control of a scientist when he or she wa

1) Name four factors that are under the control of a scientist when he or she wants to increase the rate of a reaction. 2) As scientist, we often talk about wanting to speed react…

1) Name one of the many \"hurdles\" to microbial growth in the fruitcake above (

1) Name one of the many "hurdles" to microbial growth in the fruitcake above (there are quite a few correct answers, most of which are one word in length... some potential correct…

1) Nitrogen and hydrogen gases react to form ammonia gas as follows: N,(g) + 3H/

1) Nitrogen and hydrogen gases react to form ammonia gas as follows: N,(g) + 3H/g) 2NH,(g) At a certain temperature and pressure, 1.2 L of N reacts with 3.6 L of H.. If all the N …

1) Of four properties that define the conditions of gas (pressure, Volume, tempe

1) Of four properties that define the conditions of gas (pressure, Volume, temperature and moles), which two are studied in the Boyle's Law experiment? explain briefly how the rem…

1) Of the following, which is the best base to create a buffer with a pH = 4.5?

1) Of the following, which is the best base to create a buffer with a pH = 4.5? a) Pyridine, Kb = 1.7x10^-9 b) Ethylamine, Kb = 6.4x10^-4 c) Hydrazine, Kb = 1.3x10^-6 d) Aniline, …

1) On a climb up Mt. Whitney, the atmospheric pressure is 511mmHg . Part A What

1) On a climb up Mt. Whitney, the atmospheric pressure is 511mmHg . Part A What is the pressure in atm? P =___________ atm ? Part B What is the pressure in torr? P = ________ torr…

1) One method of producing drinkable water is to force seawater through a membra

1) One method of producing drinkable water is to force seawater through a membrane that does not allow the salt to pass through. Such a process is called reverse osmosis (RO) and …

1) One mole of an ideal gas is sealed in a 22.4-L container at a pressure of 1 a

1) One mole of an ideal gas is sealed in a 22.4-L container at a pressure of 1 atm and a temperature of 273 K. The temperature is then increased to 309 K , but the container does …

1) One mole of ice is warmed from 220 K to 300 k at constant pressure of 1 bar.

1) One mole of ice is warmed from 220 K to 300 k at constant pressure of 1 bar. Find the enthalpy change for this process 2) If we assume that the volume of the ice/water does not…

1) One mole of ice is warmed from 220 K to 300 k at constant pressure of 1 bar.

1) One mole of ice is warmed from 220 K to 300 k at constant pressure of 1 bar. Find the enthalpy change for this process 2) If we assume that the volume of the ice/water does not…

1) One mole of ozone, O3, has 1.8 x 1024 atoms. A) True B) False 2) 21.2g KBr is

1) One mole of ozone, O3, has 1.8 x 1024 atoms. A) True B) False 2) 21.2g KBr is equal to 0.178 moles. A) True B) False 3) In Ca3(PO4)2 there are three calcium atoms for every two…

1) One of the differences between a voltaic cell and an electrolytic cell is tha

1) One of the differences between a voltaic cell and an electrolytic cell is that in an electrolytic cell __________. a. an electric current is produced by a chemical reaction b. …

1) One of the lines of hydrogen’s emission spectrum results from electrons relax

1) One of the lines of hydrogen’s emission spectrum results from electrons relaxing from the n=3   energy levels to the n=2 energy levels. a) Using the equation for energy levels …

1) One of the major problems is the large amount of phthalic acid (see your text

1)     One of the major problems is the large amount of phthalic acid (see your text for Kas) managed to make its way into the pond. The Company wants to know the pH of the pond. …

1) One thousand barrels of a 40°API crude are blended with one thousand barrels

1) One thousand barrels of a 40°API crude are blended with one thousand barrels of a 20°API crude. Estimate the °API of the resulting blend. Clearly state your assumptions and com…

1) One way to find teh degree of saturation of a solid/liquidsolution is to drop

1) One way to find teh degree of saturation of a solid/liquidsolution is to drop some solute into the solution. If thecrystal sits at the botton of the container the solution is: …

1) One way to help identify the components of a product mixture with gas chromat

1) One way to help identify the components of a product mixture with gas chromatography is to? A) Run the sample through both polar and nonpolar columns B) Run the samples through…

1) One way to help identify the components of a product mixture with gas chromat

1) One way to help identify the components of a product mixture with gas chromatography is to? A) Run the sample through both polar and nonpolar columns B) Run the samples through…

1) Only analog signals can be used to transmit information. a) True b) False 2)

1) Only analog signals can be used to transmit information. a) True b) False 2) In half-duplex communication between two hosts, both hosts can transmit, and both hosts can receive…