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The air within a piston equipped with a cylinder absorbs 545 J of heat and expands...
the structure of phosphoric acid may be represented as a central phosphorus atom double-bonded to an...
Consider the titration of 30.0 mL of 0.050 MNH3 with 0.025 MHCl. Calculate the pH after...
Rank the following bases in order of increasing base strength and explain why. (1 = weakest,...
If calcium hydroxide has a Ksp value of 5.5*10^-6 and magnesium hydroxide has a Ksp value...
For water ∆H°vap = 40.7 kJ/mol at 100.°C, its boiling point. Calculate w and ∆E for...
The acetyl groups that enter the citric acid cycle are ultimately derived from carbohydrates, fatty acids,...
1. Draw the line-bond structure for stearic acid and linoleic acid. Identify which fatty acid is...
What is the vapor pressure at 23 degC of a solution of 1.20 of haphtalene, C10H8...
The pKb values for the dibasic base B are pKb1 = 2.10 and pKb2 = 7.87....
Starting with 0.250L of a buffer solution containing 0.250 M benzoic acid (C6H5COOH) and 0.20 M...
The developing chamber is not covered with plastic wrap during the development of the chromatogram. Will...
Current is applied to a motlen mixture of PbF2, NiCl2, MgI2. What is produced at cathode?...
Magnesium oxide can be made by heating magnesium metal in the presence of gaseous oxygen. When...
What is the concentration of the Vitamin C standard solution that you are making? Using the...
4. Water absorbs photons of wavelength 3x10-6m, with close to 100% efficiency. How many photons are...
What is the signifance of when a) a reaction is multiplied by a factor the change...
A copper refinery produces a copper ingot weighing 82.3kg. The density of copper is 8.94g/cm3 a)...
At 25 °C the value of Kb for codeine, a pain-killing drug, is 1.63 10-6. Calculate...
What is the solubility in moles/liter for calcium sulfate at 25 oC given a Ksp value...
If one of the hydrogens bonded to the carbon atom in acetic acid is replaced by...
A prescription requires 1 g of cefazolin to be administered to the patient in 100 mL...
The pK of saccharin, HC7H3SO3, a sweetening agent, is 11.68. What is the pKb of the...
1) Back in the day, aluminum was a highly precious metal. It was first isolated by...
1) In the following reactions i) Identify the oxidation state of the elements involved and ii)...
One process used in gold mines to recover gold from mined rock is as shown below:...
For each of the following pairs of substances, indicate which will have the higher enthalpy of...
1) Consider the following questions a) Light takes 8 minutes and 19 seconds to reach from...
Explain the difference between ΔH and ΔU.
Ammonia gas is synthesized by combining hydrogen and nitrogen. A. To produce 562g of NH3 what...
20. You run a reaction with 1 µg of enzyme QB26, buffer and 25 millimolar (mM)...
What is the molarity of the H+ ions in 0.50 M acetic acid, CH3COOH?
When ethyl chloride, CH3CH2Cl, is dissolved in 1.0 M NaOH, it is converted into ehanol, CH3CH2OH,...
The following equations represent the various ways a salt could dissolve and react with water. (C+...
What is the freezing point of an aqueous solution that boils at 106.4 C
The pH's of eight 0.1M aqueous salt solutions are given below. Write the hydrolysis equation(s) for...
Explain why the conductivity of 0.073 M Ba(NO3)2(aq) is greater than that of 0.073 M KBr(aq)....
1a) What is the pH of a 0.225 mol L−1 ammonia solution? b) What is the...
Which of the following solutions will have the lowest freezing point? a.) KF (aq) 0.50m b.)...
How much heat is required to raise the temperature of 230 g CH3OH(l) from 22.0 to...
The quantity 432 mg of a monoamino monocarboxylic amino acid is observed to consume 7.39 mEq...
A) Calculate the value of ΔrG° for the reaction: N2 (g) + 3 H2 (g) →...
Is toluene miscible with water? With ethyl alcohol? ( table 2.1)
What initiator is used in the bulk polymerization of PMMA? In the emulsion polymerization? Can these...
What is an infusible plastic? What type of polymeric structure is it likely to have?
Please show ALL work. Conversions and formulas and everything there is. The density of air at...
A refrigerator using Helium Gas operates on a reversed Brayton Cycle with a pressure ratio of...
How do you calculate predicted yield of a hydrogenation reaction of cyclohexene to form benzene and...
What is the membrane potential in millivolts due to Na+ ions if the extracellular concentration of...
a) You start with your modeling predictions. You assume that the polymer does not degrade. Rather,...
why does Vmax not change in the presence or absence of a competitive inhibitor? conversely, Vmax...
carbon -12 contains 6 protons and 6 nuetrons. The radius of the nucleus is approximately 2.7...
please show work. When 1.5953g of an organic iron compound containing Fe, C H and O...
Assays were preformed by mixing AChE, THC, and 340 microM DTNB in 100 mM pH phosphate...
Co(II) was used as an internal standard to analyze a sample of Ti(IV) with atomic absorption...
Butane (C4H10) is burned with excess air. The exhaust gas from the combustion is analyzed and...
Briefly describe how you will interpret your NMR spectra to determine whether you have made the...
Deduce a possible structure for the compound with the IR absorptions below. C3H5N: 3000, 2250 cm-1
2500 lbm/h of fresh fruit juice containing 88 wt% water and 12 wt% solids is sent...
Determine the number of molecules in a 261 mg dose of aspirin, molecular formula C9H8O4.
Ten grams of plastic beads with a density of 1.2 g/cm^3 are added to 500 mL...
aluminum is mined as the mineral bauxite, which consists primarily of Al2O3 (alumina). The aluminum can...
NaCl, Corn Oil, Graphite, BaSO4, Kitty Litter, benzoyl peroxide, KNO3. Which of the following do you...
rank the following list of aqueous solutions and solvents according to decreasing vapor pressure the substance...
You have 475 mL of an 0.15 M acetic acid solution. What volume (V) of 1.20...
A 0.250-g sample of a magnesium-aluminum alloy dissolves completely in an excess of HCl(aq). When the...
According to the following reaction how many grams of ammonium nitrate are needed to form 24.7...
If a solution containing 18.06 g of mercury(II) chlorate is allowed to react completely with a...
10 mL of 0.10 M HCl is being titrated with 0.10 M NaOH. What would the...
Calculate the pH change when 6.0 mL of 6.0-M NaOH is added to 0.600 L of...
If the student collects 234.6 g of product, what is the percent yield of [Cu(NH3)4H2O]SO4?
Two 20.0-g ice cubes at –11.0 °C are placed into 255 g of water at 25.0...
The solvent for an organic reaction is prepared by mixing 50.0 mL of acetone (C3H6O) with...
What volume requires a basic solution of 0.15 M sodium hydroxide to produce 135.0 g of...
A soda is put into a bucket of water and immediately sinks to the bottom of...
Ka for hypochlorous acid, HClO is 3.0x10^-8. Calculate the pH after 10.0, 20.0, 30.0 and 40.0...
Give examples of hydrolysis and non hydrolysis sites in polymers with explanation ?
A solution contains 49.0 g of heptane (C7H16)and 59.0 g of octane (C8H18) at 25 ∘C....
The data below show the concentration of ABversus time for the following reaction: AB(g)→A(g)+B(g) Time (s)...
In an experiment, a sample of 4.92 L of nitrogen at 10.8°C and 793 mmHg is...
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