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Chemistry Questions
comment on the use of oxidation test (cro3) as a testing reagent. what functional group(s) react...
What mass of melamine, C3N3(NH2)3, will be obtained from 168.5 kg of urea, CO(NH2)2, if the...
What are the H3O+ and OH− concentrations of solutions that have the following pH values? pH...
10) The Haber-Bosch Process for nitrogen fixation is needed to make fertilizers such as ammonia (NH3):...
Suggest suitable starting materials and reagents for the synthesis of 2-allyl-4-phenylcyclohexanone using enolate alkylation reactions. Select...
A student is asked to determine the value of Ka for nitrous acid by titration with...
Suppose 60.8 mL of a 0.136 M solution of Na2SO4 reacts with 161 mL of a...
Calculate Ecell at 25°C if the ion concentrations are 0.010M Cu2+, 2.0M MnO4- and 1.0M H...
7. derive the Bragg's condition to obtain an XRD pattern four marks 8. compare the powder...
For Pravastatin , the molecular formula C23H36O7, answer the following a) which is the most acidic...
In a simplified version of the solar system model (developed by Niels Bohr, a Danish chemist),...
Draw the structure of cis-1,2-dimethylcyclopropane and clearly label the sources of angle, steric, and torsional strain...
To generate the supernatants that you used to measure a_635, you had to centrifuge the samples...
50 ml of mineral oil is mixed with a liter of water and is subjected to...
For a scientific report, write a detailed method for synthesising aspirin in a lab by using...
The mass of 0.985 moles of a hypothetical molecule, XYQ3, is correctly expressed as (where X...
Determine the molar mass of each of the following gases: a) 0.92 g of a gas...
write a balanced nuclear equations for each of the following fusion reactions. write both the total...
A student mixed 4.00 mL of 1.02 x 10-1 M Fe(O3)3 with 100.0 mL of 1.98...
Glucose, C6H12O6,C6H12O6, is used as an energy source by the human body. The overall reaction in...
When Al metal reacts with HBr, aluminum bromide and hydrogen gas are formed. If you started...
1. A comic book villain is holding you at gun point and is making you drink...
Which one of the following mixtures will act as a buffer? 0.1 mol of CH3NH2 and...
Identify the limiting reactant of the reaction: MgO(s) + 2HCl(aq) → MgCl2(aq) + H2O(g) 25.0mL HCL...
The following salts dissociate completely in water. Write chemical equations that show reactions (if any) of...
A voltaic cell consists of an Mn/Mn2+ half-cell and a Pb/Pb2+ half-cell. Calculate [Pb2+] when [Mn2+]...
Detailed mechanism for 3,3-dimethylpentan-2-ol heated with sulfuric acid to produce a major product of 2,3-dimethylpent-2-ene
1.20 g H2 is allowed to react with 9.73 g N2, producing 1.68 g NH3. What...
Calculate the volume of 7.0M NaOH required to prepare 300. mL of 0.50M NaOH.
A- 20.0g block of zinc (s=0.390J/g*C) was heated to 100 C and then placed in 75.0mL...
Some single displacement reactions involve one halogen replacing a less reactive halogen. Cl2, replaces iodine in...
In the experiment analyzing fatty acids in oils and fats using gas chromatography, extraction of fatty...
PART A. Standardization of NaOH(aq) Calculate the molar mass of KHP from the molecular formula: __204.22...
2.000 moles of A and 0.800 moles of B are sealed in a 5.000 L container...
The Ka of a monoprotic weak acid is 5.06 × 10-3. What is the percent ionization...
A 0.340M solution of the salt NaA has ph of 8.40 calculate the ka value of...
Determine the direction of flow of fluoride ion through a selectively permeable membrane with one solution...
15 mL of standard Cu solution with concentration 2.002±0.001 g/L was taken using a 15 mL...
given the balanced equation 2NO(g)+5H2(g)—-> 2NH3(g)+2H2O(l), how many geams of NH3(g) is produced when 25.3 g...
At a particular temperatur KP=0.70, for the reaction N2O4<->2NO2 a A flask containing only N2O4 at an...
A 20.00 mL Ba(OH)2 solution of unknown concentration was neutralized by the addition of 29.57 mL...
The value of KC for the thermal decomposition of hydrogen sulfide, shown below, is 2.2 ×...
Consider the decomposition: N2O4(g) --> 2NO2(g) at 350K Kp=0.2 If we start with 1 atm of...
In the chemical equation 2A+3B⟶C+4D, how many molecules of C can form if 6molecules of A...
For the reaction 2Al+3H2SO4⟶3H2+Al2(SO4)32Al+3H2SO4⟶3H2+Al2(SO4)3 how many grams of sulfuric acid, H2SO4, are needed to react completely...
Design a buffer that has a pH of 4.45 using one of the weak base/conjugate acid...
(a) In liquid-liquid extraction, define and distinguish between (a) distribution constant and (b) distribution ratio [5...
(chemical reaction- All relevant chemicals noted with correct name, formula and reactions. ) my question is...
A solution is prepared by mixing 20.0 mL of 0.050 M acetic acid and 10.0 mL...
What is the volume of an oxygen tank if it contains 12 moles of oxygen at...
At what approximate positions might the following compounds show IR absorptions? a. CH3CH2C(O)CH3 b. (CH3)2CHCH2C≡CH c....
Solution Preparation You need to prepare solutions for the reactions you will perform in the laboratory...
1)The density of the unknown liquid with the volume of 13.3 mL and a mass of...
Which of the following statements is INCORRECT? A, The relationship between the solubility of a gas...
7. How many moles of Ag(s) can be produced from 100.0 grams of Fe(s) according to...
A patient is given 0.055 mg of technetium-99 m, a radioactive isotope with a half-life of...
What is the chemical equation for the reaction that occurs between hydrochloric acid & potassium carbonate?...
Generate the balanced redox reaction for the oxidation of HS- to SO4-2 using the reduction of...
The top loading balance is used to weigh out 1.13 g of salicylic acid as a...
Balance each of the following chemical equations. a) Ba(NO3)2(aq) + Na2CrO4(aq) —> BaCrO4(s) + NaNO3(aq) b)...
From the below molecules or polyatomic ions sketch both the lewis and an 3-d structure. If...
The chemical formula for hydrogen cyanide is HCN. How many unshared electrons are associated with a...
To find the pH of a solution of NH4Br directly, one would need to use: Select...
A quantity of 2.00 × 102 mL of 0.715 M HCl is mixed with 2.00 ×...
A solution contains either Ag+(aq) or Fe3+(aq). Which chemical reagent would NOT allow you distinguish which...
For the reaction Na2CO3+Ca(NO3)2⟶CaCO3+2NaNO3Na2CO3+Ca(NO3)2⟶CaCO3+2NaNO3 how many grams of calcium carbonate, CaCO3, are produced from 54.754.7 g...
Which of the following is a stronger base? Explain your answer. 1) n-butanol or tert-butanol
calculate the density of an object, the mass 183 g and volume of 21 ml
Evaporating sweat cools the body because evaporation is endothermic and absorbs 2.44 kJ per gram of...
5) Determine Ka for Phosphoric acid. In a 1.0 M solution of this acid when the...
The decomposition of N2O5 can be described by the equation 2N2O5(soln)⟶4NO2(soln)+O2(g) Consider the data in the...
Identify one major difference between the following pairs of chemical compounds when using IR spectroscopy analysis:...
write a balanced chemical equation for the reaction that occurs when aluminium metal undergoes a combination...
What is the freezing point of a solution that contains 22.5 g of urea, CO(NH2)2, in...
I need help with this please. 1. Calculate the volume of a 0.1M NaOH that 40.0...
The amount of energy released by burning a fuel source, measured in energy per mass, is...
If 500g of water is added to 75g of 2.5 m of NaCl, what is the...
Give the delta S, and delta H (heat of fusion) for ice melting at STP. Use...
Calculate the root-mean-square velocity of nitrogen gas at 273 K.
Ribonuclease (RNase) usually have the highest activity at pH=5. If we plan to prepare a buffer...
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