Chemistry concepts and calculations
117302 questions • Page 1981 / 2347
What mass of sodium cyanide must be added to 250ml of water in order to obtain a
What mass of sodium cyanide must be added to 250ml of water in order to obtain a solution having a pH of 10.50? Ka(HCN) = 4.9 x 10 ^-10 Please give a step by step solution. I am r…
What mass of sodium cyanide must be added to 250ml of water in order to obtain a
What mass of sodium cyanide must be added to 250ml of water in order to obtain a solution having a pH of 10.50? Ka(HCN) = 4.9 x 10 ^-10 Please give a step by step solution. I am r…
What mass of sodium sulfite would be required to form 500.0 mL of a solution wit
What mass of sodium sulfite would be required to form 500.0 mL of a solution with [Na+] = 0.223 M? 2. Assuming the final density of the solution in Question 1 is 1.032 g/mL, calcu…
What mass of solid NaCH_3 CO_2 (molar mass = 82.0 g-mol^-1) should be added to 1
What mass of solid NaCH_3 CO_2 (molar mass = 82.0 g-mol^-1) should be added to 1.0 L of 0.50 M CH_3 CO_2 H to make a buffer with a pH of 7.21? (pK_a of CH_3 CO_2 H = 7.21) (Must s…
What mass of solid NaCN must be added to 500 mL of 0.50 M HCN to prepare a buffe
What mass of solid NaCN must be added to 500 mL of 0.50 M HCN to prepare a buffer solution with a pH of 9.50? pKa for HCN is 9.21 For the following equilibrium: CaC_2O_4(s) double…
What mass of the salt sodium benzoate (NaC_6 H_5 COO) should be added to 150 mL
What mass of the salt sodium benzoate (NaC_6 H_5 COO) should be added to 150 mL of a 0.125 M benzoic acid (C_6 H_5 COOH) solution to obtain a buffer solution with a pH of 4.00. Da…
What mass of titanium chloride could be formed from the reaction of 3.00 g titan
What mass of titanium chloride could be formed from the reaction of 3.00 g titanium and 8 grams of chlorine gas?
What mass of titanium chloride could be formed from the reaction of 3.00 g titan
What mass of titanium chloride could be formed from the reaction of 3.00 g titanium and 8 grams of chlorine gas?
What mass of water (in grams) forms from the reaction of 2.49 L of hydrogen gas
What mass of water (in grams) forms from the reaction of 2.49 L of hydrogen gas and 2.21 L of oxygen gas? Both gases are at 694 torr and 6.6 oC.
What mass of water is contained in 10.0 moles of the hydrated compound cobalt(II
What mass of water is contained in 10.0 moles of the hydrated compound cobalt(II) chloride hexahydrate? Show calculations. A hydrate with a mass of 0.900g was heated and the resid…
What mass of which reagent is left unreacted?Hydrogen peroxide is used as a clea
What mass of which reagent is left unreacted?Hydrogen peroxide is used as a cleaning agent in the treatment of cuts and abrasions for several reasons. It is an oxidizing agent tha…
What mass, in grams, of sodium carbonate is required for complete reaction with
What mass, in grams, of sodium carbonate is required for complete reaction with 8.35g of nitric acid to produce sodium nitrate, carbon dioxide, and water? A) 28.1 g B) 14.04 g C) …
What mass, in grams, of sodium carbonate is required for complete reaction with
What mass, in grams, of sodium carbonate is required for complete reaction with 8.35g of nitric acid to produce sodium nitrate, carbon dioxide, and water? A) 28.1 g B) 14.04 g C) …
What material is used in the third reaction to capture the water formed during t
What material is used in the third reaction to capture the water formed during the esterification? a Biodiesel Discussions and Questions [Compatibility Model Home Insert Design La…
What mechanism directly causes the decline in oxygen during eutrophication? A_fi
What mechanism directly causes the decline in oxygen during eutrophication? A_fish coming to feed on the algae and using too much of the oxygen B-growth in toxic organisms C-nitro…
What method is used to determine the form of the rate law - that is, what method
What method is used to determine the form of the rate law - that is, what method is used to determine the rate law for a given reaction? Please explain your answer. Please differe…
What might be the result if you skipped the ether washing step of the distillate
What might be the result if you skipped the ether washing step of the distillate when isolating citral from lemongrass oil via steam distillation? Select the best answer. a. the a…
What might happen to your reaction if your glassware is wet (because you washed
What might happen to your reaction if your glassware is wet (because you washed it the same day as the reaction was conducted)? Why might you expect a poor yield of alkene product…
What might have been the product ratios observed in this experiment if an \"apro
What might have been the product ratios observed in this experiment if an "aprotic solvent" had been used instead of water in the following reaction CH3CH2CH2CH2-OH + H2SO4 -->…
What might have been the product ratios observed in this experiment if an \"apro
What might have been the product ratios observed in this experiment if an "aprotic solvent" had been used instead of water in the following reaction CH3CH2CH2CH2-OH + H2SO4 -->…
What minimum pressure in psi (pounds per square foot) would a 250 mL aerosol can
What minimum pressure in psi (pounds per square foot) would a 250 mL aerosol can have to withstand if it were to contain 2.50 L of gas measured at 700torr Assume temperature stays…
What mistake did this student make? Is it possible to determine the identity of
What mistake did this student make? Is it possible to determine the identity of the unknown from this graph (with the help of the pKa table)? The student forgot to acidify the sol…
What modern connections do you see between the actions and arguments of the Fili
What modern connections do you see between the actions and arguments of the Filipinos and modern colonized peoples? What similarity in tactics do you see being used by the US then…
What must u vary in order to ontain a Beer\'s Law plot? What must u measure in o
What must u vary in order to ontain a Beer's Law plot? What must u measure in ordrr to obtain a Beer's Law plot? On Beer's Plot, what is plotted on the y-axis? On Beers's plot, wh…
What must you vary in order to obtain a Beer\'s Law plot? . . What must you meas
What must you vary in order to obtain a Beer's Law plot? . . What must you measure in order to obtain a Beer's Law plot? . . On a Beer's Law plot, what is plotted on the x-axis? .…
What name is given to the process where the products of a reaction react to form
What name is given to the process where the products of a reaction react to form reactants? Equilibrium process Balanced process C. Reversible process Secondary process 2C + D whe…
What needs to happen: An input from the user (number) corresponds to a day of th
What needs to happen: An input from the user (number) corresponds to a day of the week. The next number will add to that day to give a future day of the week. The output needs to …
What nuclear process is used in commercial nuclear power plants produce energy?
What nuclear process is used in commercial nuclear power plants produce energy? fusion fission metastable induction radiocarbon dating position emission tomography A high degree o…
What numerical value of resolution is sufficient for infinitesimal overlap of tw
What numerical value of resolution is sufficient for infinitesimal overlap of two Gaussian zones of equal width and height Calculate resolution of two Gaussian zones in which the …
What observations and conclusions can you note about each of the three reactions
What observations and conclusions can you note about each of the three reactions that occurred in the test tubes where you combined potassium iodide, KI, and hydrogen peroxide, H2…
What observations would you make which would indicate when the following reactio
What observations would you make which would indicate when the following reactions are essentially complete? a) the dissolving of marble (calcium carbonate) in hydrochloric acid, …
What observed rotation is expected when a 1.30 M solution of (R)-2-butanol is mi
What observed rotation is expected when a 1.30 M solution of (R)-2-butanol is mixed with an equal volume of a 0.650 M solution of racemic 2-butanol, and the resulting solution is …
What occurs during a reaction of aqueous Hydrochloric Acid and Aluminum hydroxid
What occurs during a reaction of aqueous Hydrochloric Acid and Aluminum hydroxide? Use the fact that HCl is a strong acid and is essentially completely ionized in water together w…
What occurs in a reaction in which the reactant is a solid andthe product is a g
What occurs in a reaction in which the reactant is a solid andthe product is a gas? (a) There is no change in entropy (b) The entropy change is most likely negative because themol…
What occurs in the process of ionization? (a) Acids dissociate to produce hydrox
What occurs in the process of ionization? (a) Acids dissociate to produce hydroxide ion, as their onlynegative ions (b) Strong bases ionize alomost completely yielding a maximumqu…
What occurs when a substance at point E loses heat and moves to point D? Which o
What occurs when a substance at point E loses heat and moves to point D? Which of the following liquids would make a good solvent for iodine, I_2? How many grams of water arc need…
What of the following has the highest C to O bond strength? Which of the followi
What of the following has the highest C to O bond strength? Which of the following has the highest C to O bond length? A pi (pi) bond is a result of Overlap of two s orbitals Over…
What of the following is true of benzene? Select all the correct answers (more t
What of the following is true of benzene? Select all the correct answers (more than one may be selected). Select one or more: The benzene ring is a distorted hexagon. The carbon-c…
What of the following statement is correct: An aldol reaction can involve two al
What of the following statement is correct: An aldol reaction can involve two aldehydes acting as eletrophiles. An aldol reaction can involve tw aldehydes acting as nuclephiles. A…
What options are available for transferring data between unix machines separated
What options are available for transferring data between unix machines separated by an air gap? - USB flash drives - Optical media eg CDs and DVDs - Printed paper and Scanning+OCR…
What other services are similar to Zoho Reports... ? I performed a search for al
What other services are similar to Zoho Reports... ? I performed a search for alternatives and all articles seemed to focus on the CRM and so it was a false comparison. I mean all…
What other solvents can be used for aqueous extractions? In one experiment, ethy
What other solvents can be used for aqueous extractions? In one experiment, ethyl acetate was used as a solvent for neutral phenylalanine (non-anion) because it has similar nonpol…
What oxidation changes does the iron undergo? Write the corresponding balanced h
What oxidation changes does the iron undergo? Write the corresponding balanced half-reaction. Discuss your color change observations. How can this data be explained in light of wh…
What pH is required to obtain 99% of amine? Show all of your work. Toluidine is
What pH is required to obtain 99% of amine? Show all of your work. Toluidine is a weak organic base. We will use this property to protonate it with 3M HCl and form a hydrochloride…
What pH would yield the maximum separation of Mn 2+ from Sn 2+ in a solution tha
What pH would yield the maximum separation of Mn2+ from Sn2+ in a solution that is 0.060 M in Mn2+, 0.060 M in Sn2+, and saturated in H2S? (Assume the green form of MnS.) Metal Io…
What part of the electromagnetic spectrum is known as the infrared region? Expre
What part of the electromagnetic spectrum is known as the infrared region? Express your answer in terms of both frequency and wavelength. What is the frequency range of the charac…
What part of this compound gives rise to the peak the furthest downfield (12.79
What part of this compound gives rise to the peak the furthest downfield (12.79 ppm) in the 1H NMR spectrum? a. Aromatic protons …
What part of this compound gives rise to the peak the furthest downfield (12.79
What part of this compound gives rise to the peak the furthest downfield (12.79 ppm) in the 1H NMR spectrum? a. Aromatic protons …
What patterns are noted in electron structures found in the elements of a family
What patterns are noted in electron structures found in the elements of a family in the periodic table? They all have the same atomic numbers. atomic mass numbers. outer orbital e…
What percentage of the earth\'s crust can be attributed to aluminum atoms? 2.Whi
What percentage of the earth's crust can be attributed to aluminum atoms? 2.Which of the following cations is aluminum metal capable of donating electrons to? D. Zn What are alums…
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