| Question | Subject | Tutorials |
|---|---|---|
| Explain period of discharge of a lead-acid battery
During a period of discharge of a lead-acid battery, 405 g of Pb from the anode is converted into PbSO4 (s).
What mass of PbO2 (s) is reduced at the cathode during this same period?
and
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| What mass of liquid will be present
If 13.0g of CCl3F is enclosed in a 1.2-L container, what mass of liquid will be present, when the vapor pressure of CCl3F at 300K is 856 torr?
… |
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| What happens to the ice in the clothes In the experiment for classifying matter by properties wet clothes hung outside in subfreezing weather will freeze. Eventually the clothes dry, even if the temperature remains below freezing.
(a) W … |
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| A particular first-order reaction has a rate constant of
A particular first-order reaction has a rate constant of 1.35 x10^2 s^-1 at 25 degrees Celsius. What is the magnitude of k at 95degress Celsius if Ea= 55.5 kJ/mol?
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| How to calculate the ratio of ch3nh2 to ch3nh3cl Calculate the ratio of CH3NH2 to CH3NH3Cl required to create a buffer with pH = 10.10 [CH3NH2]/[CH3NH3CL] = ? I know that the answer is 0.34 but is not wright to write it in this way in mastering chem … |
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| State why is it more difficult to precipitate cupric acetate
Why is it more difficult to precipitate cupric acetate (verdigris) than cupric carbonate hydroxide (malachite)?
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| Define compound liberates a gas when treated with c2h5mgbr Identify the following compound from its IR and proton NMR spectra. C4H6O: NMR: ? 2.43 (1H, t, J = 2 Hz); ? 3.41 (3H, s); ? 4.10 (2H, d, J = 2 Hz) IR: 2125, 3300 cm-1 The C4H6O compound liberates a ga … |
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| Construct a simulated 1h nmr spectrum Question- 1. Construct a simulated 1H NMR spectrum for 1,2-dichloroethane by dragging and dropping the appropriate splitting pattern into the box on the chemical shift baseline, and by dragging an int … |
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| State rank the solutions in order of increasing ph
Consider 0.10 M solutions of the following substances. Rank the solutions in order of increasing pH where 1 is the solution with the lowest pH and 7 is the solution with the highest pH. Refe … |
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| Explain the Highest to the Lowest Osmotic Pressure Each of the following solutions is separated from a solution containing pure water with a semipermeable membrane. Assuming they all have the same temperature, rank the solutions from the highest to th … |
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| Write the Chemical Equation for the Ionization of HCOOH Formic acid, HCOOH, is a weak electrolyte What solute particles are present in an aqueous solution of this compound? Write the chemical equation for the ionization of HCOOH.
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| Calculate the density
Question 1: Calculate the density, in grams per liter, of carbon dioxide (CO2) gas at STP.
Question 2: How many grams of CO(g) are there in 74.5 mL of the gas at 0.933 atm and 30o C?
& … |
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| An unknown sample of cu2 gave an absorbance of 0262 in aa An unknown sample of Cu2+ gave an absorbance of 0.262 in AA analysis. Then 1.00 ml of solution containing 100.0 ppm Cu2+ ws mixed with 95.0 ml of unknown and diluted to 100 ml in a volumetric flask, T … |
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| What is the ksp for ag2cro4 The solubility of silver chromate is 0.0287 g/1.0 L of solution. What is the Ksp for Ag2CrO4?
A. 2.6 × 10-12
B. 9.5 × 10-5
C. 6.5 × 10-13
D. 2.4 × 10-5
E. < 1.0 &time … |
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| Evaluate the ratio of naf to hf required to create a buffer 1) Calculate the ratio of NaF to HF required to create a buffer with pH = 4.10. 2)Calculate the ratio of CH3NH2 to CH3NH3Cl required to create a buffer with pH = 10.22
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| Define what are the favored geometrical arrangements for abn What are the favored geometrical arrangements for ABn molecules for which the A atom has 2,3,4,5 and 6 pairs of electrons in its valence shell?
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| Calculate the free energy change
Question- Consider the fructose-1,6-bisphosphatase reaction. Calculate the free energy change if the ratio of the concentrations of the products to the concentrations of the reactants is 21. … |
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| Phosphorus is obtained primarily from ores containing
Phosphorus is obtained primarily from ores containing calcium phosphate.If a particular ore contains 58.5% calcium phosphate, what minimum mass of the ore must be processed to obtain 1.00 kg … |
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| Explain the reaction of (r)-2-bromooctane with ch3s Draw the product you expect from the reaction of (R)-2-bromooctane with CH3S-. Be sure to show stereochemistry
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| How many carbons are in the planar double-bond system How many carbons are in the planar double-bond system of 3-methylcyclopentene?An acyclic hydrocarbon with the formula C20H34 has how many pi bonds?
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