Chemistry concepts and calculations
117302 questions • Page 397 / 2347
A common analogy for limiting reactant problems is to compare it to making a pla
A common analogy for limiting reactant problems is to compare it to making a plate full of sandwiches. Let's say you have guests coming over and you want to whip up a batch of sar…
A common antifreeze for car radiators is ethylene glycol, CH2(OH)CH2(OH). How ma
A common antifreeze for car radiators is ethylene glycol, CH2(OH)CH2(OH). How many milliliters of this substance would you add to 5.9 L of water in the radiator if the coldest day…
A common biological buffer is a “phosphate buffer,” which involves the equilibri
A common biological buffer is a “phosphate buffer,” which involves the equilibrium between H2PO4- and HPO42-, with a pKa at 25 Celcius of 6.86. Describe in words how you would pre…
A common ingredient in many prepared foods is partially hydrogenated soybean oil
A common ingredient in many prepared foods is partially hydrogenated soybean oil. "Partially hydrogenated" means that some (but not all) of the double bonds in the fatty acid tail…
A common lab experiment is known as an acid-base neutralization. Typically, one
A common lab experiment is known as an acid-base neutralization. Typically, one may perform the following experiment: 50.0 mL of 0.500 M HBr at 25.0°C is added to 50.0 mL of 0.500…
A common laboratory reaction is the neutralization of an acid with a base. When
A common laboratory reaction is the neutralization of an acid with a base. When 50.0 mL of 0.500 M HCl at 25.0°C is added to 50.0 mL of 0.500 M NaOH at 25.0°C in a coffee cup calo…
A common memory matching game played by young children is to start with a deck o
A common memory matching game played by young children is to start with a deck of cards that contain identical pairs. For example, given six cards in the deck, two might be labele…
A common method for synthesizing alkenes is by dehydrating (removing the element
A common method for synthesizing alkenes is by dehydrating (removing the elements of water) an alcohol. The dehydration is accomplished by heating the alcohol with either phosphor…
A common method of producing a gaseous hydride is to treat a salt containing the
A common method of producing a gaseous hydride is to treat a salt containing the anion of the volatile hydride with a strong acid. a. Write an equation for each of the following e…
A common method of producing a gaseous hydride is to treat a salt containing the
A common method of producing a gaseous hydride is to treat a salt containing the anion of the volatile hydride with a strong acid. a. Write an equation for each of the following e…
A common method of producing a gaseous hydride is to treat a salt containing the
A common method of producing a gaseous hydride is to treat a salt containing the anion of the volatile hydride with a strong acid. a. Write an equation for each of the following e…
A common method of producing a gaseous hydride is to treat a salt containing the
A common method of producing a gaseous hydride is to treat a salt containing the anion of the volatile hydride with a strong acid. a. Write an equation for each of the following e…
A common method of producing a gaseous hydride is to treat a salt containing the
A common method of producing a gaseous hydride is to treat a salt containing the anion of the volatile hydride with a strong acid. a. Write an equation for each of the following e…
A common method of producing a gaseous hydride is to treat a salt containing the
A common method of producing a gaseous hydride is to treat a salt containing the anion of the volatile hydride with a strong acid. a. Write an equation for each of the following e…
A common method that is used to organize and calculate the concentrations of the
A common method that is used to organize and calculate the concentrations of the species in an equilibrium system is colloquially known as an I.C.E. chart. “I.C.E” stands for Init…
A common method used in manufacturing sodium hypochlorite bleach is by the react
A common method used in manufacturing sodium hypochlorite bleach is by the reaction Cl2 + 2NaOH -----> NaCl + NaOCl + H2O Chlorine gas is bubbled through an aqueous solution of…
A common method used in manufacturing sodium hypochlorite bleach is by the react
A common method used in manufacturing sodium hypochlorite bleach is by the reaction: Cl2 + 2NaOH ----> NaCl + NaOCl + H2O. Chlorine gas is bubbled through an aqueous solution o…
A common misconception among students is that %u201Cyou leave liquids and solids
A common misconception among students is that %u201Cyou leave liquids and solids out of equilibrium constants.%u201D All the species involved in this react ion were liquids, and a…
A common organic reaction, referred to as an SN2 reaction, involves an electron
A common organic reaction, referred to as an SN2 reaction, involves an electron rich substance displacing another substance. An example of this reaction is shown below: Which of t…
A common oxide of carbon is CO2(carbon dioxide), a gas that plays a critical rol
A common oxide of carbon is CO2(carbon dioxide), a gas that plays a critical role in life on Earth. Conversely, the same oxide of silicon, SiO2, is a rock consisting of a lattice …
A common pc running bash inside a home LAN network (with a router/gateway provid
A common pc running bash inside a home LAN network (with a router/gateway providing internet access to the LAN) does not have any contact with the external internet, except browse…
A common practice in early stages of research is to simulate the conditions of b
A common practice in early stages of research is to simulate the conditions of blood using a simple buffered system. You are tasked with the responsibility to prepare 250 mL of bu…
A common shorthand way to represent a voltaic cell is to list its components as
A common shorthand way to represent a voltaic cell is to list its components as follows: anode/ anode, solution ll cathode, solution/ cathode. A double vertical line represents a …
A common shorthand way to represent a voltaic cell is to list its components as
A common shorthand way to represent a voltaic cell is to list its components as follows: anode|anode solution||cathode solution|cathode A double vertical line represents a salt br…
A common side effect of some antacids is feeling \"gassy\". Explain why? Why is
A common side effect of some antacids is feeling "gassy". Explain why? Why is it so important to record the intial and final volume each time the syringe is refilled? Milk of magn…
A common type of liquid level control in tanks and reactors is the float level c
A common type of liquid level control in tanks and reactors is the float level control valve. An example is shown below. If this looks familiar is because you have seen one of the…
A common unit for pressure is pounds per square inch (PSI). show that 1 atm = 14
A common unit for pressure is pounds per square inch (PSI). show that 1 atm = 14.7 PSI. An automobile tire is inflated to 28.0 PSI gauge pressure when cold, at 18 C. A) What will …
A common way to make hydrogen gas in the laboratory is to place a metal such as
A common way to make hydrogen gas in the laboratory is to place a metal such as zinc in hydrochloric acid (see the figure). The hydrochloric acid reacts with the metal to produce …
A company approaches you to develop an e-business presence which will include B2
A company approaches you to develop an e-business presence which will include B2C (this is how your eCommerce solution will provide the medium for the company you choose to SELL t…
A company has four employee types; 1.) Pay Code 1 is for managers who receive a
A company has four employee types; 1.) Pay Code 1 is for managers who receive a fixed annual salary, 2.) Pay Code 2 is for hourly workers who receive a fixed hourly amount for hou…
A company is planning a party for its employees. A fun rating is assigned to eve
A company is planning a party for its employees. A fun rating is assigned to every employee. The employees are organized into a strict hierarchy, i.e. a tree rooted the president.…
A company sells spyware that can intercept and record phone communications and e
A company sells spyware that can intercept and record phone communications and email on a variety of email services. The company sells the software to government agencies in the U…
A company that I work with has asked me to do candidate phone screenings to make
A company that I work with has asked me to do candidate phone screenings to make sure they aren't completely embarrassed when sending over someone to a potential client. It turns …
A company wants you to write a C++ program that allows the user to input 10 empl
A company wants you to write a C++ program that allows the user to input 10 employee names, hourly rate and hours worked into 3 arrays. Program should compute each employees gross…
A company wants you to write a C++ program that allows the user to input 10 empl
A company wants you to write a C++ program that allows the user to input 10 employee names, hourly rate and hours worked into 3 arrays. Program should compute each employees gross…
A company which produces genetically-engineered corn sues a farmer for selling s
A company which produces genetically-engineered corn sues a farmer for selling seed com 3. which it claims to have produced own stock and has never had any input to that stock fro…
A company whose services I\'m trying to integrate uses this protocol: 1. An AES
A company whose services I'm trying to integrate uses this protocol: 1. An AES key is embedded in an Android library. 2. To authenticate itself, the library sends a SHA1 hash of t…
A company wishes to distill a 0.80 mole fraction ethanol (0.20 mole fraction wat
A company wishes to distill a 0.80 mole fraction ethanol (0.20 mole fraction water) solution. To aid in the distillation process, a 0.95 mole fraction benzene (0.05 mole fraction …
A complete-mix activated sludge process treats 5 MGD of wastewater containing 22
A complete-mix activated sludge process treats 5 MGD of wastewater containing 225 mgL soluble BOD_5 to 20 mg/L soluble BOD_5. The volume of the aeration basin is 111, 400 ft^3 and…
A complete-mix activated sludge process with secondary clarification and sludge
A complete-mix activated sludge process with secondary clarification and sludge recycle is used to treat a dairy wastewater at a flow rate of 1000m3/day with a influent biodegrada…
A completely mixed reactor (CSTR or CMRF) is to be used to treat an industrial w
A completely mixed reactor (CSTR or CMRF) is to be used to treat an industrial wastewater. A tracer study is conducted to determine the true hydraulic residence time of the reacto…
A completely mixed reactor (CSTR or CMRF) is to be used to treat an industrial w
A completely mixed reactor (CSTR or CMRF) is to be used to treat an industrial wastewater. A tracer study is conducted to determine the true hydraulic residence time of the reacto…
A completely relaxed 500bp circular DNA molecule has a linking number (L) = 50.
A completely relaxed 500bp circular DNA molecule has a linking number (L) = 50. DNA gyrase, a type II topoisomerases, hydrolyzes two molecules of ATP while adding left-handed supe…
A complex ion is a charged species consisting of a metal ion surrounded by _____
A complex ion is a charged species consisting of a metal ion surrounded by ______and a coordination compound is a species consisting of complex ion surrounded by ______The oxidati…
A complex mixture of antioxidant polyphenolic flavonoids extracted from chocolat
A complex mixture of antioxidant polyphenolic flavonoids extracted from chocolate was separated by normal phase HPLC using a bonded cyanopropyl column. Initial separation using on…
A complex number z may be expressed as z-x + jy in the Cartesian co-ordinate sys
A complex number z may be expressed as z-x + jy in the Cartesian co-ordinate system or as z = re in the polar co-ordinate system, where x, y, r and are real quantities and j = sqr…
A complexation titration was performed to determine the concentration of Cd2+ in
A complexation titration was performed to determine the concentration of Cd2+ in a sample. A 50 mL aliquot of the Cd2+ sample was taken and titrated with 0.002 M EDTA at a constan…
A component with molecular formula C_ H_ O_2shows the following spectral data: ^
A component with molecular formula C_ H_ O_2shows the following spectral data: ^1 H NMR: 1.2(3H, t), 2.1 (2H, q) 3.6 (3H, ) IR: 1730 cm^-4 possible structure is: A compound with m…
A composition of a solution can be expressed in several different ways. Find of
A composition of a solution can be expressed in several different ways. Find of the most common concentration units a defined as follows. mass % = mass of component/total mass of …
A compound (moleculr weight 250 g/mol, pure liquid vapr pressure of 2e10 atm at
A compound (moleculr weight 250 g/mol, pure liquid vapr pressure of 2e10 atm at 15 C, and activity coefficient of 0.5) is monitored in the aerosol phase. Overnight (T=15 C), total…
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