Chemistry concepts and calculations

1.How would each of the following modifications to the experimental procedure us

1.How would each of the following modifications to the experimental procedure used in this investigation affect the mass of product obtained? Indicate if the mass of product would…

1.Hydrogen gas can be produced in the laboratory through reaction of magnesium m

1.Hydrogen gas can be produced in the laboratory through reaction of magnesium metal with hydrochloric acid: Mg+ 2HCl-> MgCk + H2 2. What volume, in liters, of H2 at 25 degree …

1.ISG Antacid # 1.52 Antacid #2 Antacid #3 PART DATA tro henoth Antacid brand na

1.ISG Antacid # 1.52 Antacid #2 Antacid #3 PART DATA tro henoth Antacid brand name Regular or Extra Strength eaula Antacid active ingredients Mass of antacid Molarity of HCI solut…

1.Identify the conjugate acid of SO42– A) H2SO4 B) HSO4– C) H2SO3 D) H3O+ E) SO3

1.Identify the conjugate acid of SO42– A) H2SO4 B) HSO4– C) H2SO3 D) H3O+ E) SO32– 2.Which of the following substance is/are acidic Urine Saliva Milk Stomach juice All of the abov…

1.If 3.27 g of salicylic acid is reacted with 61 mL methanol, what is the maximu

1.If 3.27 g of salicylic acid is reacted with 61 mL methanol, what is the maximum mass of product (oil of wintergreen) that could be formed? The density of methanol is 0.791 g/mL.…

1.If 3.27 g of salicylic acid is reacted with 61 mL methanol, what is the maximu

1.If 3.27 g of salicylic acid is reacted with 61 mL methanol, what is the maximum mass of product (oil of wintergreen) that could be formed? The density of methanol is 0.791 g/mL.…

1.If a gas sample at constant temperature has a volume of 21.3 Ml at 764 torr, w

1.If a gas sample at constant temperature has a volume of 21.3 Ml at 764 torr, what will the volume be at 546 torr? 2. A 5.40 L gas sample at 854 torr is compressed at 1.35atm to …

1.If an indication of the buffer capacity of a 0.010M buffer is measured as 20 d

1.If an indication of the buffer capacity of a 0.010M buffer is measured as 20 drops of added acid, predict how many drops of acid could be added to the buffer if it had a concent…

1.If the left hand side of the plot is the lower wavelength of the UV-Vis scale,

1.If the left hand side of the plot is the lower wavelength of the UV-Vis scale, approximate the lambda max for the compound that produced the spectra below. (assume wv on the x-a…

1.If the left hand side of the plot is the lower wavelength of the UV-Vis scale,

1.If the left hand side of the plot is the lower wavelength of the UV-Vis scale, approximate the lambda max for the compound that produced the spectra below. (assume wv on the x-a…

1.If the rate law for the clock reaction is: Rate = k [ I-] [ BrO3 -] [H+] A clo

1.If the rate law for the clock reaction is: Rate = k [ I-] [ BrO3 -] [H+] A clock reaction is run with the following initial concentrations: [I-] [BrO3-] [H+] [S2O32-]           …

1.In design-by-contract, the code responsible for making sure the precondition (

1.In design-by-contract, the code responsible for making sure the precondition (requires clause) is true when a method is called is: A. the client code that calls the method B. th…

1.In general, which type of compounds have the highest melting points (covalent

1.In general, which type of compounds have the highest melting points (covalent compounds or ionic compounds)? (4 points) 2.Based on the structural and chemical characteristics of…

1.In operating systems, Is a transaction a process? Are they the same concept? 2

1.In operating systems, Is a transaction a process? Are they the same concept? 2.Does a transaction have the same meaning in database management systems, as in OS? A database book…

1.In pure water [H^+] = [OH^-] a.[H^+] = [OH^-] 2. [H^+] = 10^-1 ------------ 10

1.In pure water [H^+] = [OH^-] a.[H^+] = [OH^-] 2. [H^+] = 10^-1 ------------ 10^-7 ---------------10^-14                   acid           neutral    basic b.decreases 3.Co2 x+ (-…

1.In the following table what is the main entities that need to be tracked in th

1.In the following table what is the main entities that need to be tracked in the system (1 point) 2.After examining the table carefully identify the functional dependences (2 poi…

1.In the test for SO42–-, explain why the addition of acid will dissolve other

1.In the test for SO42–-, explain why the addition of acid will dissolve other insoluble barium salts. Write the equation for the reaction of BaCO3 in acid solution. 2. Why do B…

1.In this reaction, which species is oxidized? (a) Succinate (b) Fumerate (c) FA

1.In this reaction, which species is oxidized? (a) Succinate (b) Fumerate (c) FAD (d) FADH2 2. In this reaction, which species is reduced? (a) Succinate (b) Fumerate (c) FAD (d) F…

1.In which case would exposure to a compound cause you more concern? (Choose one

1.In which case would exposure to a compound cause you more concern? (Choose one from each pair; ie. a or b, c or d, etc.) a)an LD50 of 2500 mg/kg or b) an LD50 of 50 mg/kg c) a T…

1.In which of the following substances should hydrogen bonding contribute to the

1.In which of the following substances should hydrogen bonding contribute to the attractive interactions in the molecules? In which of the following substances should hydrogen bon…

1.In which reaction is S° expected to be positive? A. H2O(l) + 2SO2(g) H2SO4(l)

1.In which reaction is S° expected to be positive? A. H2O(l) + 2SO2(g) H2SO4(l) B. 2C2H6(g) + 7O2(g) 4CO2(g) + 6H2O(l) C. Ga(l) Ga(s) D. CO2(g) CO2(s) E. none of these choices are…

1.In your own words, explain the \"surprise\" in Planck\'s work and the social s

1.In your own words, explain the "surprise" in Planck's work and the social significance of the time (1900s). 2. Explain how fireworks work. 3. Explain the photoelectric effect an…

1.Incoming solar radiation is called a. Albedo b. Equator C. Insolation d.Consol

1.Incoming solar radiation is called a. Albedo b. Equator C. Insolation d.Consolation 7. Energy flows from warm bodies to cold ones when in contact is called a. Consolation b. Con…

1.It is important to rinse all glassware before use in a chemical experiment. Wh

1.It is important to rinse all glassware before use in a chemical experiment. When using a beaker to hold a solution that is to be pipetted, the beaker should be rinsed with Selec…

1.It is known that the D H 0 for the reaction is +624.6 kJ. SiO 2 (g) + 3C(s) It

1.It is known that the DH0 for the reaction is +624.6 kJ. SiO2(g) + 3C(s) It is known that the DH0 for the reaction is +624.6 kJ. With excess carbon for the reaction above, the he…

1.It takes 15 drops of solution A to react completely with 29 drops of solution

1.It takes 15 drops of solution A to react completely with 29 drops of solution B? Which equation below represents this reaction in the smallest whole number ratio? Assume that so…

1.It takes 15 drops of solution A to react completely with 29 drops of solution

1.It takes 15 drops of solution A to react completely with 29 drops of solution B? Which equation below represents this reaction in the smallest whole number ratio? Assume that so…

1.Keshan disease is caused by ________ deficiency. 2.Nutritional factors that ma

1.Keshan disease is caused by ________ deficiency. 2.Nutritional factors that may be protective against cancer include: 3.Which of the following fruits is likely to be the best so…

1.Let A and B two m,essages and H() be a hash function that is defined on their

1.Let A and B two m,essages and H() be a hash function that is defined on their message space. If A=B tyhen H(A)=H(B).(this property is a direct consequence of the definition of f…

1.List some advantages as well as disadvantages to using the Craig tube crystall

1.List some advantages as well as disadvantages to using the Craig tube crystallization technique. 2.What was the purpose of using activated charcoal in this experiment? Did you n…

1.Match the type of cellular control with the description. 2. Match each compone

1.Match the type of cellular control with the description. 2. Match each component with one of the following descriptions. Drag the appropriate labels to their respective targets.…

1.Mineral A described in the rock is 2. Mineral B described in the rock is 3. Mi

1.Mineral A described in the rock is 2. Mineral B described in the rock is 3. Mineral C described in the rock is 4. What is the rock type of this sample? sedimentary rock igneous …

1.Moles of NO2 initially= mass/molar mass , molar mass of NO2= 46 Moles of NO2 i

1.Moles of NO2 initially= mass/molar mass , molar mass of NO2= 46 Moles of NO2 initially = 7.18/46=0.16 , Let x= moles of N2O4 formed to reach a pressure of 0.75 atm Moles : NO2= …

1.Name at least 6 intermolecular forces in increasing strength. For each, give a

1.Name at least 6 intermolecular forces in increasing strength.  For each, give an example of a compound having that intermolecular force. The intermolecular forces should be indu…

1.Neutrons are found inside the atomic nucleus of an atom! True or false? 1.Neut

1.Neutrons are found inside the atomic nucleus of an atom! True or false? 1.Neutrons are found inside the atomic nucleus of an atom! True or false? B Choose the correct definition…

1.Nitric oxide and nitrogen dioxide are found in photochemical smog. Nitrogen di

1.Nitric oxide and nitrogen dioxide are found in photochemical smog. Nitrogen dioxide is formed from nitrogen monoxide in the exhaust of automobile engines. A possible mechanism f…

1.Observation: You went out to a local coastal marsh and took a sediment core.Yo

1.Observation: You went out to a local coastal marsh and took a sediment core.You look at it and find a layer of grass material about 6 cm thick from the surface.Below that layer,…

1.On a mass basis a mixed gas stream consists of 3%nitricoxide,4%sulfurdioxide,3

1.On a mass basis a mixed gas stream consists of 3%nitricoxide,4%sulfurdioxide,39% carbon dioxide,and the balance nitrogen.Determine the molar composition and the ideal gas heat c…

1.Once upon a time a student dumped out all the coffee cans into Tuperware, dut

1.Once upon a time a student dumped out all the coffee cans into Tuperware, dut he didnt label the caffeinated and the decaffeinated. How might your determine which coffee is caff…

1.Phosphoric acis (H3PO4) is a triprotic acid. How many mL of 0.04800M NaOH is r

1.Phosphoric acis (H3PO4) is a triprotic acid. How many mL of 0.04800M NaOH is required to neutralize 0.02500L of 0.1600 M phosphoric acid? (Hint: 3 moles of NaOH would react with…

1.Place the following in order of decreasing standard molar entropy. H2O (l) H2O

1.Place the following in order of decreasing standard molar entropy. H2O (l) H2O (g) H2O (s) 2.Calculate S°rxn for the following reaction. The absolute entropies, S°, for each of …

1.Plot the Maxwell-Boltzmann distribution function, p(v), for molecular speeds v

1.Plot the Maxwell-Boltzmann distribution function, p(v), for molecular speeds versus the speed, v, for N2 gas at -100.0°C and 1400° C. Locate the most probable speed, the average…

1.Plot the Maxwell-Boltzmann distribution function, p(v), for molecular speeds v

1.Plot the Maxwell-Boltzmann distribution function, p(v), for molecular speeds versus the speed, v, for N2 gas at -100.0°C and 1400° C. Locate the most probable speed, the average…

1.Predict the product that is formed when the compound shown below undergoes a r

1.Predict the product that is formed when the compound shown below undergoes a reaction with LiAlH4. Interactive 3D display mode 2.Draw the organic products you would expect to is…

1.Propane, C 3 H 8 , is a component of natural gas. What is the molar mass of pr

1.Propane, C3H8, is a component of natural gas. What is the molar mass of propane? How many grams of carbon are in 30. kg of propane? 3. What volume of hydrogen gas is required to…

1.Rank the following ions in order of decreasing radius: F,Cl,Br,I, and At. Use

1.Rank the following ions in order of decreasing radius: F,Cl,Br,I, and At. Use the periodic table as necessary.Rank from largest to smallest radius. To rank items as equivalent, …

1.Rank the following types of light - radio waves, gamma rays, microwaves, red l

1.Rank the following types of light - radio waves, gamma rays, microwaves, red light, blue light - in terms of: a.Increasing energy per photon b.Increasing wavelength c.Increasing…

1.Rank the heats of hydrogenation for the following, 1 being most heat released

1.Rank the heats of hydrogenation for the following, 1 being most heat released and 4 being least heat. 2 Rank the following carbocations in order of increasing stability (least&g…

1.Rank the labelled stars in terms of their temperature, from hottest to coldest

1.Rank the labelled stars in terms of their temperature, from hottest to coldest: Select one: B, C, A C, A, B C, B, A A, C, B B, A, C A, B, C 2.Assume for a moment that the three …

1.Select ALL of the following that have a carbon oxygen double bond (C=O). A) ca

1.Select ALL of the following that have a carbon oxygen double bond (C=O). A) carboxylic acid B) alkene C) ester D) ether 2. Geometric isomers can be present in molecules with a d…