Chemistry concepts and calculations
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1. The following results were collected for two experiments involving the reacti
1. The following results were collected for two experiments involving the reaction at 600 oC between gaseous sulfur dioxide and oxygen to from gaseous sulfur trioxide. Experiment …
1. The formula for salicylic acid is C-H.O, calculate its cesof unsaturation 2 T
1. The formula for salicylic acid is C-H.O, calculate its cesof unsaturation 2 The formula for Aspirin is CoH,O, calculate its degrees of unsaturation 3. Draw the structures of sa…
1. The formula for sulfurous acid is H2SO3. What is the name and formula of the
1. The formula for sulfurous acid is H2SO3. What is the name and formula of the anion in this acid? a) Sulfite, SO32- b)Sulfite, SO3 c) Sulfate, SO32- d)Sulfate, SO3 2. On a cold,…
1. The formula for sulfurous acid is H2SO3. What is the name and formula of the
1. The formula for sulfurous acid is H2SO3. What is the name and formula of the anion in this acid? a) Sulfite, SO32- b)Sulfite, SO3 c) Sulfate, SO32- d)Sulfate, SO3 2. On a cold,…
1. The formula of a compound can be determined if the ratio of the number of mol
1. The formula of a compound can be determined if the ratio of the number of mols of each of the elements in the compound is known. An insoluble precipitate of silver chloride for…
1. The gas phase decomposition of nitrosyl chloride at 400 K NOCl(g) ---> NO(g)
1. The gas phase decomposition of nitrosyl chloride at 400 K NOCl(g) ---> NO(g) + ½ Cl2(g) is second order in NOCl with a rate constant of 5.90×10-4 M-1 s-1. If the initial con…
1. The generic metal hydroxide M(OH)2 has K sp = 7.25×10 12 . (NOTE: In this par
1. The generic metal hydroxide M(OH)2 has Ksp = 7.25×1012. (NOTE: In this particular problem, because of the magnitude of the Ksp and the stoichiometry of the compound, the contri…
1. The glassware that is to be used for a Grignard reaction is washed with water
1. The glassware that is to be used for a Grignard reaction is washed with water and acetone, and dried thoroughly before the reaction is to be performed. Select the most likely r…
1. The goose has a mass of 22.2 lb (pounds) and is flying at 9.80 miles/h (miles
1. The goose has a mass of 22.2 lb (pounds) and is flying at 9.80 miles/h (miles per hour). What is the kinetic energy of the goose in joules? 2. A piston has an external pressure…
1. The growth of an organism on hexadecane (MW=226.4) can be described by the fo
1. The growth of an organism on hexadecane (MW=226.4) can be described by the following stoichiometric equation: C16H34 + 12.4 02 + 2.09 NH3 -------> 2.42 ( C4.4 H7.3 N0.86O1…
1. The half life of sodium-24 is 15.0 hr. How many hours will it take for an ini
1. The half life of sodium-24 is 15.0 hr. How many hours will it take for an initially observed activity to decrease to 75% of its initial value? Answer is 6.2 2. The hydrogenatio…
1. The half-life of 90 Sr is 29.1 y. If a sample initially contains 50.00 g of 9
1. The half-life of 90Sr is 29.1 y. If a sample initially contains 50.00 g of 90Sr, how much 90Sr remains after 58.2 y? 2. The current disintegration rate for carbon-14 is 14.0 Bq…
1. The heat of neutralization is the heat of reaction when one mole of acid reac
1. The heat of neutralization is the heat of reaction when one mole of acid reacts with one mole of base to create one mole of salt and one mole of water. Use the following data t…
1. The heat of vaporization of water is 540 cal/g. What mass of water at 100°C c
1. The heat of vaporization of water is 540 cal/g. What mass of water at 100°C can be vaporized by the addition of 45.0 kcal of heat? a. 0.0120 g b. 0.0833 g c. 12.0g d. 83.3 g TO…
1. The hot metal piece weighing 2.500g at 100.0°C is dropped into 40.0 mL water
1. The hot metal piece weighing 2.500g at 100.0°C is dropped into 40.0 mL water at 20.0 °C. The final temperature of the system is 24.0°C. If the metal is treated as the system, t…
1. The human body requires 20g of a substance each day to operate correctly. Thi
1. The human body requires 20g of a substance each day to operate correctly. This substance would be called a(n) a. macronutrient b. micronutrient c. trace mineral d. RDI e. no co…
1. The hydroperoxide ion, HO2– (aq), reacts with permanganate ion, MnO4– (aq) to
1. The hydroperoxide ion, HO2– (aq), reacts with permanganate ion, MnO4– (aq) to produce MnO2 (s) and oxygen gas. Balance the equation for the oxidation of hydroperoxide ion to O2…
1. The ideal gas law (PV=nRT) provides relationships among pressure, volume, amo
1. The ideal gas law (PV=nRT) provides relationships among pressure, volume, amount, and temperature of a gas inside a container. If the Kelvin temperature in a container is …
1. The ideal gas law (PV=nRT) provides relationships among pressure, volume, amo
1. The ideal gas law (PV=nRT) provides relationships among pressure, volume, amount, and temperature of a gas inside a container. If the Kelvin temperature in a container is…
1. The image below depicts the formation of what tectonic feature? A. Tephra B.
1. The image below depicts the formation of what tectonic feature? A. Tephra B. Accretionary prism C. Ripples D. Pillow lavas E. Subduction currents 2. At which plate boundary …
1. The impossibility of zero-calorie beer (6) Ethanol that we consume is oxidize
1. The impossibility of zero-calorie beer (6) Ethanol that we consume is oxidized to acetate in the liver, which is then converted to acetyl-CoA and further metabolized to 2 CO2 D…
1. The insecticide 2-hydroxyquinoxaline (CsH&N20;) can be degraded in soil syste
1. The insecticide 2-hydroxyquinoxaline (CsH&N20;) can be degraded in soil systems by Bacillus bacteria. For a soil porewater concentration of 42 mg/L, determine the ThOD if B…
1. The isotope 8 He has a half life of 0.1225 s. HOw long will it take for the r
1. The isotope 8 He has a half life of 0.1225 s. HOw long will it take for the radioactivity of a sample of this isotope to fall to 1/16 of its original intensity? a. 0.25 s b. 0.…
1. The isotope chromium-51 has a half-life of 28 days. If the original sample ha
1. The isotope chromium-51 has a half-life of 28 days. If the original sample had a mass of 28.0 grams, what mass of the chromium-51 sample remains after 84 days? a. 7.00 g b. 3.5…
1. The key part of the apparatus used to measure the vapor pressure of a liquid
1. The key part of the apparatus used to measure the vapor pressure of a liquid as a function of temperature is called the isoteniscope, which is illustrated in Figure 8.4. What v…
1. The lab manual states that \"the number of vibrational modes (different types
1. The lab manual states that "the number of vibrational modes (different types of vibrations) in a molecule is 3N-5 for linear molecules and 3N-6 for non-linear molecules. Why do…
1. The lab manual states that \"the number of vibrational modes (different types
1. The lab manual states that "the number of vibrational modes (different types of vibrations) in a molecule is 3N-5 for linear molecules and 3N-6 for non-linear molecules. Why do…
1. The labels fell off two test tubes onto a student\'s laboratory bench. One te
1. The labels fell off two test tubes onto a student's laboratory bench. One test tube contained sodium oxalate and the other contained barium chloride. Beside these two tubes, th…
1. The length of a 60 W, 240 light bulb filament is 60 cm. Part A: If the potent
1. The length of a 60 W, 240 light bulb filament is 60 cm. Part A: If the potential difference across the filament is 120 V, what is the strength of the electric field inside the …
1. The letters&arrows; in the formula refer to the carbons or hydrogens for four
1. The letters&arrows; in the formula refer to the carbons or hydrogens for four of the five groups in 3-methyl-2-butanone (methyl isopropyl ketone. c. (1) If the unlabeled me…
1. The ligand splitting for aqueous octahedral complexes of Co 2+ and Co 3+ are
1. The ligand splitting for aqueous octahedral complexes of Co2+ and Co3+ are 8400 cm-1 and 16750 cm-1, and the electron pairing energy is approx. 22000 cm-1 for both comp…
1. The lines observed in H-lamp are parts of Balmer Series. All these lines are
1. The lines observed in H-lamp are parts of Balmer Series. All these lines are due to a transition from various higher n value to a common n. What is this common lower n value fo…
1. The lithium dication, Li2+, has an energy level formula analogous to that of
1. The lithium dication, Li2+, has an energy level formula analogous to that of the hydrogen atom, since both species have only one electron. The energy levels of the Li2+ ion are…
1. The loss of an alpha particle causes: a. no change in the atomic number. b. t
1. The loss of an alpha particle causes: a. no change in the atomic number. b. the atomic number to decrease by 1. c. …
1. The loss of an alpha particle causes: a. no change in the atomic number. b. t
1. The loss of an alpha particle causes: a. no change in the atomic number. b. the atomic number to decrease by 1. c. …
1. The m l quantum number for an electron in the 5forbital: a) may be +1/2 or -1
1. The ml quantum number for an electron in the 5forbital: a) may be +1/2 or -1/2 b) is four c) none of these is correct d) can have any integer value from 0 to 5 e) may be any va…
1. The mRNA produced when the following sense strand DNA sequence is transcribed
1. The mRNA produced when the following sense strand DNA sequence is transcribed is: 5’- AATTTCCCAATCATCCAT -3’ A) 5’- UUAAAGGGUUAGUAGGUA -3’ B) 5’- AAUUUCCCAAUCAUCCAU -3’ C) 5’- …
1. The main source of Earth\'s most important greenhouse gas is b. forest transp
1. The main source of Earth's most important greenhouse gas is b. forest transpiration c. ocean evaporation d. volcanoes 2. The fastest flowing ocean currents are typically found …
1. The mass of a liquid is 200 cg and its volume is 50 cm3. Report its density i
1. The mass of a liquid is 200 cg and its volume is 50 cm3. Report its density in g/mL. 2. The specific heat of copper is 0.093 cal/g °C and the specific heat of silver is 0.0…
1. The mass of a proton is 1.00728 amu and that of a neutron is 1.00867 amu. Wha
1. The mass of a proton is 1.00728 amu and that of a neutron is 1.00867 amu. What is the binding energy (in J) of a 60/27Co nucleus? (The mass of a cobalt-60 nucleus is 59.9338 am…
1. The mass of an average blueberry is 0.71 g and the mass of an automobile is 2
1. The mass of an average blueberry is 0.71 g and the mass of an automobile is 2000 kg . Find the number of automobiles whose total mass is the same as 1.0 mol of blueberries. Exp…
1. The maxmum number of stereoisomers that are possible for a given molecule can
1. The maxmum number of stereoisomers that are possible for a given molecule can be determined from the formula, 2n, where n is the number of stereocenters in the molecule. a. Usi…
1. The measured volume of saturated Ca(IO3)2 solution was believed to be 1.0 ml
1. The measured volume of saturated Ca(IO3)2 solution was believed to be 1.0 ml and this volume was used in calculations, but due to improper use of a pipette, the actual volume d…
1. The mechanism shown is ___. In Step 2, the carbocation has ___ H’s bonded it.
1. The mechanism shown is ___. In Step 2, the carbocation has ___ H’s bonded it. In Step 3, you would draw a curved arrow from the ___. SN1 SN2 0 1 2 carbocation to the Cl- Cl- to…
1. The melting point of water is 0°C at 1 atm pressure because under these condi
1. The melting point of water is 0°C at 1 atm pressure because under these conditions: Select one: a. DeltaS for the process H2O(s) --> H2O(l) is positive. b. Delta S and Delta…
1. The metallic ions such as (choose between anions and cations) are positively
1. The metallic ions such as (choose between anions and cations) are positively electrons to the nonmetallic ions. charged because they have given up their Which of the following …
1. The mineral hausmannite, Mn 3 O 4 , which contains both manganese(II) and man
1. The mineral hausmannite, Mn3O4, which contains both manganese(II) and manganese(III) ions, is formed from heating manganese(IV) oxide to 890°C. 3 MnO2(l) ? Mn3O4(s) + O2(g) (at…
1. The molar heat of vaporization for water is 44.01 kJ/mol at 298 K and 40.79 k
1. The molar heat of vaporization for water is 44.01 kJ/mol at 298 K and 40.79 kJ/mol at 373K. Write a thermodynamic cycle explaining how you would calculate the value at 298 …
1. The molar volume of H2 gas at STP is 22.433 L/mol. We want to verify this num
1. The molar volume of H2 gas at STP is 22.433 L/mol. We want to verify this number in this experiment by reacting a strong acid with a metal to produce hydrogen gas. The followin…
1. The mole fraction of carbon dioxide in a gas mixture is 0.150. There are 0.25
1. The mole fraction of carbon dioxide in a gas mixture is 0.150. There are 0.251 g of nitrogen and 0.322 g of oxygen in this gas mixture. What is the mass of carbon dioxide in th…
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