Chemistry

In the mid-17th century, Isaac Newton proposed that light existed as a stream of particles, and the wave-particle debate continued for over 250 years until Planck and Einstein presented their revolutionary ideas. Give two pieces of evidence for the wave model and two for the particle model.
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A solution contains 0.25 M Ni(NO3)2 and 0.25 M Cu(NO3)2. Can the metal ions be separated by slowly adding Na2CO3? Assume that for successful separation 99% of the metal ion must be precipitated before the other metal ion begins to precipitate, and assume no volume change on addition of Na2CO3.
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Arrange the following H atom electron transitions in order of increasing frequency of the photon absorbed or emitted:(a) n = 2 to n = 4(b) n = 2 to n = 1(c) n = 2 to n = 5(d) n = 2 to n = 1
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How many electrons in an atom can have each of the following quantum number or sublevel designations?(a) 2s (b) n = 3, l = 2(c) 6d
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formula for sodium iodine
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At 1400 mm Hg, a gas has a volume of 350L. What is it volume at stander pressure?
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If the vapor pressure of a liquid is less than the atmospheric pressure, the liquid will not boil. TRUE FALSE
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The following statement best describes which law?The total pressure of a mixture of gases is the sum of the partial pressures ofthe gases that make it up.OA) Boyle's lawOB) Dalton's lawOC) Charles's lawOD) combined gas law
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A chemist determined by measurements that 0.045 miles of barium participated in a chemical reaction. Calculate the mass of barium that participated in the chemical reaction
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The air pressure for a certain tire is 109 kPa. What is this pressure in atmospheres?
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Identify and explain the functions of each numbered plant organ in the diagram
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The temperature of a 10.0 L sample of nitrogen in a sealed container is increased from 22C to 202C, while its pressure is increased from 1.00 atm to 3.00 atm. What is the new volume (in liters) of the nitrogen sample?
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What is the concentration of K+K+ in 0.15 MM of K2SK2S? Express your answer to one decimal place and include the appropriate units.
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Write the expected ground-state electron configuration for the following. (Express your answers as a series of orbitals using noble gas notation, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as [He]2s1.) a The element with one unpaired electron that forms a covalent compound with fluorine. Configuration: b The (as yet undiscovered) alkaline earth metal after radium.
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At what temperature (in degrees Celsius) will xenon atoms have the same average speed that Cl2Cl2 molecules have at 41 CC?
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Theistic religion is centered in a belief in Select one: a. spirits or animals that control our lives. b. such totems as a rabbit's foot or four-leaf clover. c. gods who are thought to be powerful, who have an interest in human affairs, and who merit worship. d. abstract ideals only.
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A waterbed mattress has the following dimensions: 210 cm X 160 cm X 25 cm. The density of water is 62.4lb/ft3. What is the weight of the bed in pounds?
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For the Bradford assay, the instructor will make a Bradford reagent dye by mixing 50 ml of 95% v/v ethanol with 100 mg of Coomassie Blue followed by the addition of 100 ml of 85% v/v phosphoric acid. This entire mixture is then diluted to 1 liter with water. What is the final concentration of phosphoric acid?
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What volume is occupied by 1.000 g of H2O vapor at a temperatureof 134C and a pressure of 0.0552 atm?
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Why is the water solubility of benzoic acid significantly less than the water solubility of the benzoate ion?
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During the GFP purification experiment, the instructor will have to make breaking buffer for the students to use. This buffer contains 150mM NaCl. Given a bottle of crystalline NaCl (M.W. = 40g/mol), describe how you would make 500ml of 150mM NaCl. Include the type and sizes of any measuring vessels that you use to make the solution.
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What happens inside a can of spoiled food as gas is produced?
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Water's ability to dissolve a wide variety of molecules is important, but more important is the hydrophobic effect, which drives the aggregation of nonpolar molecules and plays a role in the folding of proteins and formation of lipid bilayers. What forces drive the hydrophobic effect?a. Decreased entropy of water is the largest driving force.b. Water repels the hydrophobic molecules. c. Increased entropy of water is the largest driving force. d. Hydrophobic molecules are attracted to each other.
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An unsaturated hydrocarbon is A. a hydrocarbon that contains oxygen. B. a compound in which all carbon atoms have four single bonds. C. a compound in which one or more carbon atoms have double or triple bonds. D. a hydrocarbon that is dissolved in water. E. a cycloalkane with five or more carbons.
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