Chemistry concepts and calculations
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When he received the Nobel Prize in chemistry in 1960, Willard Libby gave a lect
When he received the Nobel Prize in chemistry in 1960, Willard Libby gave a lecture about radioactive dating to the king of Sweden and assembled guests in Stockholm. a) It wa…
When heated to 350 degrees C at 0.950 atm, the ammonium nitrate decomposes to pr
When heated to 350 degrees C at 0.950 atm, the ammonium nitrate decomposes to produce nitrogen, water, and oxygen gases; 2NH4NO3(s) delta--->2N2(g)+4H2O(g)+O2(g): a) How many l…
When heated with phosphoric acid, 2-butanol undergoes dehydration to give a mixt
When heated with phosphoric acid, 2-butanol undergoes dehydration to give a mixture of the three isomeric alkenes. The alkenes are shown below along with the area of the peak obta…
When heated, CaCO 3 decomposes as follows: CaCO 3 (s)CO 2 (g) +CaO (
When heated, CaCO3 decomposes as follows: CaCO3 (s)<==========>CO2 (g) +CaO (s) In an experiment, 7.00 g of CaCO3 was placedin a .500-L container and when it was heated to a…
When heated, calcium carbonate (limestone) undergoes a decomposition reaction. W
When heated, calcium carbonate (limestone) undergoes a decomposition reaction. Write a balanced equation for this reaction. A. CaCO3(s) ? Ca(s) + CO3(g) B. CaCO3(s) ? Ca(s) + CO2(…
When heated, calcium carbonate decomposes to yield calcium oxide and carbon diox
When heated, calcium carbonate decomposes to yield calcium oxide and carbon dioxide gas via the reaction CaCO3(s)?CaO(s)+CO2(g) What is the mass of calcium carbonate needed to pro…
When heated, calcium carbonate decomposes to yield calcuim oxide and carbon diox
When heated, calcium carbonate decomposes to yield calcuim oxide and carbon dioxide gas via the reaction CaCO_3(s) rightarrow CaO(s) + CO_2(g) What is mass of calcium carbonate ne…
When heated, calcium carbonate decomposes with the release of gas. This is the s
When heated, calcium carbonate decomposes with the release of gas. This is the same gas that is released when calcium carbonate reacts with an acid. What is the chemical formula o…
When heated, lithium reacts with nitrogen to form lithium nitride: 6Li (s) + N2
When heated, lithium reacts with nitrogen to form lithium nitride: 6Li (s) + N2 (s) ----> 2LiN 9s) If 12.3 g of Li are heated with 33.6 g of N2: a) Determine the limiting react…
When heated, lithium reacts with nitrogen to form lithium nitride: 6Li (s) + N2
When heated, lithium reacts with nitrogen to form lithium nitride: 6Li (s) + N2 (s) ----> 2LiN 9s) If 12.3 g of Li are heated with 33.6 g of N2: a) Determine the limiting react…
When heated, the DNA double helix separates into two random-coil single strands.
When heated, the DNA double helix separates into two random-coil single strands. When cooled, the random coils reform the double helix: double helix 2 random coils (a) What is the…
When heated, the DNA double helix separates into two random-coil single strands.
When heated, the DNA double helix separates into two random-coil single strands. When cooled, the random coils reform the double helix: double helix double headed arrow 2 random c…
When hexane and an aqueous solution are mixed in a separator forced. (A) hexane
When hexane and an aqueous solution are mixed in a separator forced. (A) hexane will mix completely with the aqueous solution and one layer will present in the funnel. (B) hexane …
When household ammonia is mixed with bleach, NaOCl, toxic chlorine gas and hydra
When household ammonia is mixed with bleach, NaOCl, toxic chlorine gas and hydrazine, N_2H_4 is produced What volume of 0.75 M NH_3, would react with 100 mL of 0.35 M NaOCl? NH_3 …
When hydrogen gas is collected by displacement of water, there is always water v
When hydrogen gas is collected by displacement of water, there is always water vapor mixed with the gaseous hydrogen. The partial pressure exerted by water vapor is called its vap…
When hydrogen gas is water (H_2O)is produced Water it claniftedas what an elemen
When hydrogen gas is water (H_2O)is produced Water it claniftedas what an element a compound a homogeneous mixture a heterogeneous mixture electrolyte solution which the following…
When hydrogen peroxide decomposes (Part 1 of the experiment), the temperature ri
When hydrogen peroxide decomposes (Part 1 of the experiment), the temperature rises. A fellow student argues that this means that heat must be taken in from the surroundings rathe…
When hydrogen peroxide decomposes (Part 1 of the experiment), the temperature ri
When hydrogen peroxide decomposes (Part 1 of the experiment), the temperature rises. A fellow student argues that this means that heat must be taken in from the surroundings rathe…
When hydrolyzed to its building blocks, a molecule of vegetable oil produces wha
When hydrolyzed to its building blocks, a molecule of vegetable oil produces what compounds? In this experiment, when you mix methanol and sodium hydroxide together, the reaction …
When identifying an unknown compound in organic lab, will the tests for aldehyde
When identifying an unknown compound in organic lab, will the tests for aldehyde and ketone work for anything with a carbonyl? For example, will the DNP test be negative if there …
When ignited, solid ammonium dichromate decomposes in a fiery display. This is t
When ignited, solid ammonium dichromate decomposes in a fiery display. This is the reaction for a "volcano" demonstration. The decomposition produces nitrogen gas, water vapor, an…
When implementing a dictionary (\'I want to look up customer data by their custo
When implementing a dictionary ('I want to look up customer data by their customer IDs'), the typical data structures used are hash tables and binary search trees. I know for inst…
When import worksheets, How can I use Trim function in excel 2010 vba I import d
When import worksheets, How can I use Trim function in excel 2010 vba I import data from different workbook. In the source workbook, there are city names. Some people enters space…
When initial amounts of N2, H2, and NH3 are mixed, the concentration of NH3 incr
When initial amounts of N2, H2, and NH3 are mixed, the concentration of NH3 increases. Which statement below ia true? If you could just be explicit with how you came to your answe…
When iodine is added to an acidic solution of aceton, its purple color disappear
When iodine is added to an acidic solution of aceton, its purple color disappears indicating that the iodine has been used up. The reaction is determined to be zero order with res…
When iodine is added to an acidic solution of aceton, its purple color disappear
When iodine is added to an acidic solution of aceton, its purple color disappears indicating that the iodine has been used up. The reaction is determined to be zero order with res…
When iodine is added to an acidic solution of acetone, its purple color disappea
When iodine is added to an acidic solution of acetone, its purple color disappears indicating that the iodine has been used up. The reaction is determined to be zero order with re…
When ionic solids dissolve in water, they produce soluble aqueous cations and an
When ionic solids dissolve in water, they produce soluble aqueous cations and anions. For example, adding MgBr2 solids to water will produce ions according to the dissolution reac…
When ionic solids dissolve in water, they produce soluble aqueous cations and an
When ionic solids dissolve in water, they produce soluble aqueous cations and anions. For example, adding MgBr2 solids to water will produce ions according to the dissolution reac…
When ionic solids dissolve in water, they produce soluble aqueous cations and an
When ionic solids dissolve in water, they produce soluble aqueous cations and anions. For example, adding MgBr2 solids to water will produce ions according to the dissolution reac…
When ionic solids dissolve in water, they produce soluble aqueous cations and an
When ionic solids dissolve in water, they produce soluble aqueous cations and anions. For example, adding MgBr2 solids to water will produce ions according to the dissolution reac…
When ionic solids dissolve in water, they produce soluble aqueous cations and an
When ionic solids dissolve in water, they produce soluble aqueous cations and anions. For example, adding MgBr2 solids to water will produce ions according to the dissolution reac…
When ionic solids dissolve in water, they produce soluble aqueous cations and an
When ionic solids dissolve in water, they produce soluble aqueous cations and anions. For example, adding MgBr2 solids to water will produce ions according to the dissolution reac…
When ions are formed only electrons are added or removed. The number of protons
When ions are formed only electrons are added or removed. The number of protons cannot be changed. Doing so would change the identity of the element (as is done in a nuclear react…
When ions in aqueous solutions are totally surrounded by water molecules, the co
When ions in aqueous solutions are totally surrounded by water molecules, the combined structure is called a (an) Refer to the solubility table from the BLOCK TEN lecture slides. …
When iron(II) ammonium sulfate is dissolved in water, it disassociates into its
When iron(II) ammonium sulfate is dissolved in water, it disassociates into its component ions. Give the ions, including charges and phases, separated by commas. When oxalic acid …
When iron(ll) ammonium sulfate is dissolved in water, it disassociates into its
When iron(ll) ammonium sulfate is dissolved in water, it disassociates into its component ions. Give the ions, including charges (ex: 2+, +, -, 2-) and phases, separated by commas…
When is it necessary to where safety glasses in the laboratory? A pipette has a
When is it necessary to where safety glasses in the laboratory? A pipette has a designated volume of 20.00 mL.A student uses the pipette to deliver three aliquots of water and det…
When isolating cinnamaldehyde from a cinnamon stick, we crushed the stick and bo
When isolating cinnamaldehyde from a cinnamon stick, we crushed the stick and boiled it in a vial of water. After boiling for 25 min, we cooled the aqueous solution and transfered…
When it comes to climate change, how to meet the world\'s growing electrical ene
When it comes to climate change, how to meet the world's growing electrical energy needs without carbon based fuels has taken center stage. Nuclear energy has been grouped with so…
When it comes to naming your software product (whether an application or a libra
When it comes to naming your software product (whether an application or a library), what do you do? It seems impossible to choose a name which isn't already taken by some other p…
When it comes to non memory managed languages such as C, C++ or Fortran (my case
When it comes to non memory managed languages such as C, C++ or Fortran (my case), it becomes increasingly difficult to keep track of memory allocation/deallocation, especially wh…
When learning C# (and OO concepts more generally at the same time) something I f
When learning C# (and OO concepts more generally at the same time) something I found very distracting is exemplified by the following line: ExampleClass exampleObject = new Exampl…
When learning about the architecture of computers and how it works, we are thoug
When learning about the architecture of computers and how it works, we are thought that the lowest language that we can find that the machine understands is binary as 1&0. And…
When light of a wavelength 307nm is shined on a uranium metal surface, electrons
When light of a wavelength 307nm is shined on a uranium metal surface, electrons are ejected from the metal with velocity 5.4x10^5m/s. This phenomenon is called photoelectric effe…
When light of wavelength, 115 nm, impinges a photocathode that has a binding ene
When light of wavelength, 115 nm, impinges a photocathode that has a binding energy of 2.59 eV, electrons are ejected. What is the speed (in m/s) of the ejected electrons? h = 6.6…
When light of wavelength, 215 nm, impinges a photocathode that has a binding ene
When light of wavelength, 215 nm, impinges a photocathode that has a binding energy of 2.19 eV, electrons are ejected. What is the speed (in m/s) of the ejected electrons? h = 6.6…
When limestone (solid CaCO3) is heated, it decomposes into lime (solid Cao) and
When limestone (solid CaCO3) is heated, it decomposes into lime (solid Cao) and carbon dioxide gas. This is an extremely useful industrial process of great antiquity, because powd…
When liquid Fe(CO)5 was first isolated, two structures were postulated, a C4v sq
When liquid Fe(CO)5 was first isolated, two structures were postulated, a C4v square pyramidal structure and a D3h trigonal bipyramidal structure. Using the 5 CO stretching vibrat…
When liquid Fe(CO)5 was first isolated, two structures were postulated, a C4v sq
When liquid Fe(CO)5 was first isolated, two structures were postulated, a C4v square pyramidal structure and a D3h trigonal bipyramidal structure. Using the 5 CO stretching vibrat…
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