| Question | Subject | Tutorials |
|---|---|---|
| Explain hydroboration-oxidation reagents
There are several reagents that can be used to effect addition to a double bond including: acid and water, oxymercuration-demercuration reagents, and hydroboration-oxidation reagents. Inspec … |
Chemistry / General Chemistry | Get it Now |
| State diprotic oxyacid is an important compound
Phosphorous acid, H3PO3(aq), is a diprotic oxyacid that is an important compound in industry and agriculture.( pKa1=1.30, pKa2=6.70.) Calculate the pH for each of the following points in the … |
Chemistry / General Chemistry | Get it Now |
| Explain in an electrolysis cell similar to the one employed
In an electrolysis cell similar to the one employed in this experiment, a student observed that his unknown metal anode lost 0.238 g while a total volume of 84.90 mL of H2 was being produced … |
Chemistry / General Chemistry | Get it Now |
| Define combustion of octane and a component of gasoline
Problem- Question: The complete combustion of octane, C8H18, a component of gasoline, proceeds as follows: 2C8H18(l)+25O2(g)?16CO2(g)+18H2O(g)
Part 1) How many moles of O2 are needed to b … |
Chemistry / General Chemistry | Get it Now |
| Define the skeletal structure of the major organic product
Draw the skeletal structure of the major organic product given that excess NaOD is used and without an acid workup.
… |
Chemistry / General Chemistry | Get it Now |
| A line in the brackett series of hydrogen has a wavelength A line in the Brackett series of hydrogen has a wavelength of 2626 nm. From what state did the electron originate?
… |
Chemistry / General Chemistry | Get it Now |
| Define the hydrolysis of one ester group in tannins by CaCO3 1. Write an equation describing the hydrolysis of one ester group in tannins by CaCO3. 2. How would longer roasting time of green coffee beans effect its caffeine content
… |
Chemistry / General Chemistry | Get it Now |
| Define why the extrapolated temperature is used
1) When a metal at a higher temperature is added to water at a lower temperature. heat is inevitably lost to the container beaker or styrofoam cup. how will this unmeasured heat loss affect … |
Chemistry / Biochemistry | Get it Now |
| Define a solution containing a mixture of metal cations
A solution containing a mixture of metal cations was treated with dilute HCl and no precipitate formed. Next, H2S was bubbled through the acidic solution. A precipitate formed and was filter … |
Chemistry / Biochemistry | Get it Now |
| Explain the chlorination of 2-methylbutane that proceeded
Draw the product for the chlorination of 2-methylbutane that proceeded through a secondary radical.
… |
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| Explain the heat of vaporization of ccl3f liquid
Freon 11 was a favored refrigerant until it was determined to be detrimental to the atmospheric ozone layer. The heat of vaporization of CCl3F liquid is 25.2 kJ/mol and its normal boiling po … |
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| Describe sodium sulfate is slowly added to a solution
Sodium sulfate is slowly added to a solution containing 0.0500 M Ca2 (aq) and 0.0370 M Ag (aq). What will be the concentration of Ca2 (aq) when Ag2SO4(s) begins to precipitate?
… |
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| Predict the shape, state the hybridization of the central
Predict the shape, state the hybridization of the central atom and give the ideal bond angle and any expected deviations and show diagrams Lewis dot struction to get credit.
(a)Br03- (b)AsC … |
Chemistry / Biochemistry | Get it Now |
| Elements would you expect to form mainly covalent bonds
Problem- 1) Which of the following elements would you expect to form mainly covalent bonds?
Oxygen, Potassium, Phosphorus, Iodine, Hydrogen, Cesium
2) Which of the following elements w … |
Chemistry / Biochemistry | Get it Now |
| Estimate the approximate zeff felt by a valence electron
Shielding of electrons
The shielding of electrons gives rise to an effective nuclear charge,Zeff , which explains why boron is larger than oxygen. Estimate the approximate Zeff felt by a … |
Chemistry / Biochemistry | Get it Now |
| The known compounds containing the generic elements x and y
Suppose there are two known compounds containing the generic elements X and Y. You have a 1.00-g sample of each compound. One sample contains 0.32 g of X and the other contains 0.41 g of X. … |
Chemistry / Biochemistry | Get it Now |
| How many moles of carbon, c were in the original sample
An unknown compound contains only carbon, hydrogen, and oxygen (CxHyOz). Combustion of 3.50 g of this compound produced 5.13 g of carbon dioxide and 2.10 g of water.
How many moles of car … |
Chemistry / Biochemistry | Get it Now |
| Define the solubility of m(oh)2 in a solution buffered at ph
Consider an amphoteric hydroxide, M(OH)2(s), where M is a generic metal. Estimate the solubility of M(OH)2 in a solution buffered at pH = 7.0, 10.0, 14.0?
… |
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| Explain that a chemist has cyclohexanone
Imagine that a chemist has cyclohexanone, triphenylphosphine, butyllithium, and 2-bromobutane. Draw the organic product resulting from using these chemicals in the Wittig reaction.
… |
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| Find the molecular formula of formic acid
Formic acid is responsible for the sting you feel when stung by fire ants. By mass, formic acid is 26.10% C, 4.38% H, and 69.52% O. The molar mass of formic acid is 46.02 g/mol. Find the mol … |
Chemistry / Biochemistry | Get it Now |
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