Chemistry concepts and calculations
117302 questions • Page 2311 / 2347
the bitter tasting c ompound quinine is a component of tonicwater and is used as
the bitter tasting c ompound quinine is a component of tonicwater and is used as a protection against malaria. it contains onlyC, H, N and O. when a sample of mass 0.487 g was bur…
the black ink in tilt-tip peps substance. Spot a piece of filter paper heavily w
the black ink in tilt-tip peps substance. Spot a piece of filter paper heavily with a black (such as a Flair pen). Make the spot quite dark to be sure that enlarge link has been t…
the boiling point of PCE, TCE and DCE are known to be 121 87 and 60 degrees, giv
the boiling point of PCE, TCE and DCE are known to be 121 87 and 60 degrees, given this information can you suggest the approximate temperature range for injection port, column an…
the boiling point of a liquid increases as the pressure above the liquid increas
the boiling point of a liquid increases as the pressure above the liquid increases. In contrast to boiling food in an open pot, pressure cookers trap the steam, which raises the i…
the bucket moving after it has fallen 1.50 m (assuming that the box has not yet
the bucket moving after it has fallen 1.50 m (assuming that the box has not yet reached the edge of the roof? 24. Two boxes connected by a light string that passes over a light, f…
the buffer base was a solid (FW of NaC2H3O2* 3H2O is 136 g/mole convert the gram
the buffer base was a solid (FW of NaC2H3O2* 3H2O is 136 g/mole convert the grams of sodium acetate to moles of sodium acetate. Then calculate the molarity M, of sodium acetate (M…
the calcium carbonate in limestone reacts with a HCl solution to produce a calci
the calcium carbonate in limestone reacts with a HCl solution to produce a calcium chloride solution, carbon dioxide, and water. CaCO3(s) + 2HCl(aq) > CaCl2(aq) +H2O(l) +CO2(g)…
the capacitance? Are there other resistances that should have been taken into ac
the capacitance? Are there other resistances that should have been taken into account? How would you expect the capacitance values from the individual resistors and the parallel c…
the chemical environment the chemical environment the chemical environment the c
the chemical environment the chemical environment the chemical environment the chemical environment Splitting of a signal in a proton NMR spectrum tells us the number of chemicall…
the chemical environment the chemical environment the chemical environment the c
the chemical environment the chemical environment the chemical environment the chemical environment Splitting of a signal in a proton NMR spectrum tells us the number of chemicall…
the chemist adds 11mM silver nitrate solution to the sample until silver chlorid
the chemist adds 11mM silver nitrate solution to the sample until silver chloride **(the answer is in mg/L)** O CHEMICAL REACTIONS Solving for a reactant in solution One way the U…
the class im taking is called instrumental analysis... You want to determine the
the class im taking is called instrumental analysis... You want to determine the concentration of the amino acid below in the mushroom. So you took 5 g of mushroom and crushed wit…
the class im taking is called instrumental analysis... You want to determine the
the class im taking is called instrumental analysis... You want to determine the concentration of the amino acid below in the mushroom. So you took 5 g of mushroom and crushed wit…
the code i have so far is this #include #include \"Complex.h\" using
the code i have so far is this #include <iostream> #include "Complex.h" using namespace std; int main() { Complex c1(0,0); Complex c2(1,2); Complex c3(8,2); Complex c4(5,-3)…
the common laboratory solvent diethyl ether (ether) is often used to purify subs
the common laboratory solvent diethyl ether (ether) is often used to purify substances dissolved in it. The vapor pressure of diethyl ether, CH3CH2OCH2CH3, is 463.57 mm Hg at 25°C…
the complete combustion of propane,C3H8(g),is represented by the equation: C3H8(
the complete combustion of propane,C3H8(g),is represented by the equation: C3H8(g)+5O2(g)--->3CO2(g)+4H2O(l). delta Hdegree=-2220kJ , How much heat is evolved in the complete c…
the complete ionic equation for the reaction (if any) that occurs when aqueous 1
the complete ionic equation for the reaction (if any) that occurs when aqueous 10) Give the complete ionic solutions of lithium sulfide and copper (II) nitrate are mixed + S042-(a…
the compound below there are thre chiral carbon( carbons A,B,C) that have been c
the compound below there are thre chiral carbon( carbons A,B,C) that have been circled. Each group attached to the circles chiral carbon has been labeled with a number. These labe…
the compound sodium chloride has a solid-state structure in which there is a rep
the compound sodium chloride has a solid-state structure in which there is a repeating cubic arrangement of sodium ions and chloride ions. to the volume of the cube is 1.81*10-22 …
the computational part isn\'t right. I\'ve asked 2 times already and every answe
the computational part isn't right. I've asked 2 times already and every answer has been wrong :( same for this one. A critical reaction in the production of energy to do work or …
the concentration of a solution of potassium chloride. The concentration of a so
the concentration of a solution of potassium chloride. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how …
the concentration of a solution of potassium chloride. The concentration of a so
the concentration of a solution of potassium chloride. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how …
the concentration of hydrogen peroxide in a solution can be determined by titrat
the concentration of hydrogen peroxide in a solution can be determined by titration with permanganate solution in an acidic solution. Determine the oxidation and reduction half re…
the concentration of hydrogen peroxide in a solution can be determined by titrat
the concentration of hydrogen peroxide in a solution can be determined by titration with permanganate solution in an acidic solution. Determine the oxidation and reduction half re…
the concentration of solution A is 10 mg/liter Solution A1 was made by taking 5.
the concentration of solution A is 10 mg/liter Solution A1 was made by taking 5.00 ml of Solution A and diluting to 100.00 ml with water. Solution A2 was made by taking 10.00 ml o…
the curing of concrete is a chemical reaction involving the hydration of Portlan
the curing of concrete is a chemical reaction involving the hydration of Portland cement. at any time, the rate of increase of the compressive strength S of the concrete is propor…
the d of heat and work A mix cylinder has a piston that moves in or out, as nece
the d of heat and work A mix cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a lar…
the daily dose of the daily dose of the daily dose of the daily dose of 7. Recor
the daily dose of the daily dose of the daily dose of the daily dose of 7. Record observations in the table below. | 1% Sugar/ Starch Glucose Fructose Maltose Lactose Sucrose Star…
the data for the reaction A + B rightarrow C given in the table 0.250 0.150 0.90
the data for the reaction A + B rightarrow C given in the table 0.250 0.150 0.90 0.250 0.300 35.6 0.500 0.300 712 Determine the order of the reaction for each reactant. calculate …
the decomposition of HCO2H follows first order kinetics. The half life for the r
the decomposition of HCO2H follows first order kinetics. The half life for the reaction at a certain temperature is 34 seconds. How many seconds are needed for the formic acid con…
the definitions of heat and work A mixture of gaseous reactants is put into a cy
the definitions of heat and work A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The 1 atm pressure linder has a…
the definitions of heat and work A mixture of gaseous reactants is put into a cy
the definitions of heat and work A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The 1 atm pressure linder has a…
the difference between mass and weight can be illustrated by considering an astr
the difference between mass and weight can be illustrated by considering an astronaut. How would an astronauts mass and weight in outer space compare with his mass and weight on t…
the dipole moment, in debyes, and -1, respectively 10. a) The hond length for HF
the dipole moment, in debyes, and -1, respectively 10. a) The hond length for HF is 0.92 A. Calculate that would result if the charges on H andFwe (ID= 3.34 x 10"'cm: Q = 1.60 x 1…
the dissociation equilibrium constant for the protonated form The dissociation e
the dissociation equilibrium constant for the protonated form The dissociation equilibrium constants for the protonated form of alanine (a diprotic amino acid, H_2X^+) are K_al = …
the dna molecules need to be packaged to be supercooled or wound up in nucleosom
the dna molecules need to be packaged to be supercooled or wound up in nucleosomes 3. Which amino acids are very important in proteins (histones) that bind to DNA? A) Lys, Arg B) …
the electron affinity of atoms is also periodic. The electron affinity of an ato
the electron affinity of atoms is also periodic. The electron affinity of an atom is the energy that is lost or gained when an electron is added to a neutral atom of the element i…
the elementary reaction proceeds at a certain the elementary reaction proceeds a
the elementary reaction proceeds at a certain the elementary reaction proceeds at a certain the elementary reaction proceeds at a certain ) dashboard People's ChurchUniversity of …
the elimination of 5-bromononane on treatment with potassium ethoxide is stereos
the elimination of 5-bromononane on treatment with potassium ethoxide is stereoselective. Select the correct Newman projections of 5-bromononane showing the conformations that lea…
the end point for a titration can be determined graphically. the end point volum
the end point for a titration can be determined graphically. the end point volume for a second derivative plot corresponds to A. the volume titrant added where the second derivati…
the enthalpy change deltaH and -TdeltaS for a reaction is 25C. the temperature i
the enthalpy change deltaH and -TdeltaS for a reaction is 25C. the temperature in Kelvin that these two terms would be equal is 703K. which best describes the temperature obtained…
the enzywies wl bindl up ul the analog ins kod of the nornal sub shate it coumpe
the enzywies wl bindl up ul the analog ins kod of the nornal sub shate it coumpek wf the noomal oul Transition-State Analogs -Competitive Inhibitors and Catalytic Antibodies- Tran…
the equilibrium constant (khydr) for hydration of acetone Print CalculatorP erio
the equilibrium constant (khydr) for hydration of acetone Print CalculatorP erioc estion 15 of 18 (1 point) The equilibrium constant (Knydt) for hydration of acetone (CH3COCHs) is…
the equilibrium constant Kc is 0.83 at 400 C for thefollowing reaction: 2NH 3 (g
the equilibrium constant Kc is 0.83 at 400 C for thefollowing reaction: 2NH3 (g) N2 (g) + 3H2 (g) 14.6 g of ammonia is placed in a sealed 4.00 L flask. Theflask is then heated to …
the equilibrium constant kp for the reaction is found to be0.000431at 200degree
the equilibrium constant kp for the reaction is found to be0.000431at 200degree c N2 gaz +3H2gaz----------------2NH3 gaz in a certain experiment a student starts with 0.666atmof N…
the equilibrium constant, Keq for the following acid/base reaction is 10 -11.3 .
the equilibrium constant, Keq for the following acid/base reaction is 10-11.3. What is the pKa of HN3? Please provide the formula! I know Keq= [products]/[reactants] and pKa= -log…
the equilibrium constant, Keq for the following acid/base reaction is 10 -11.3 .
the equilibrium constant, Keq for the following acid/base reaction is 10-11.3. What is the pKa of HN3? Please provide the formula! I know Keq= [products]/[reactants] and pKa= -log…
the equilibrium vapor pressure of water at 30 degrees C is 31.6 torr. when 22.4
the equilibrium vapor pressure of water at 30 degrees C is 31.6 torr. when 22.4 g of a nonvolatile nonelectrolyte solute in 50 g of water the vapor pressure of the solution is 2.5…
the equivalence point? A. 8.69 times 10^-3 mL B. 33.4 mL C. 36.7 mL D. 115 mL 10
the equivalence point? A. 8.69 times 10^-3 mL B. 33.4 mL C. 36.7 mL D. 115 mL 10. Calculate the pH of a buffer that is 0.20 M in formic acid and 0.15 M in sodium formal (K_a = 1.8…
the experiment was on Chromatography of kool- aid and I have to answer the discu
the experiment was on Chromatography of kool- aid and I have to answer the discussion questions at the bottom of the page, can you please help me find the answers? Chromatography …
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