Chemistry Questions and Answers

  • Please help! Draw the Lewis structure for the hydrogen sulfite ion, indicating any possible resonance forms?
  • Please Help! Explain how the attraction that the nucleus exerts on an electron changes with the ...?
  • Please help! Explain why the metallic elements of a given horizontal row typically have much lower...?
  • Please help! Explain why the molecular structure of dihydrogen monosulfide is nonlinear while that for ...?
  • Please help! For Z=81 which orbitals is filled last? Why?
  • Please Help! How many core electrons are in Z=47 and Z=86?
  • Please Help! How many grams of silicon tetrafluoride, a gas, at room temperature, would fill the same...?
  • Please help! In the decomposition reaction of gallium chlorate, 75.0 grams is heated to produde oxygen and...?
  • Please Help! In the reaction barium chloride plus potassium chromate yields potassium chloride and barium...?
  • Please help! In the reaction barium chloride plus potassium chromate yileds potassium chloride and barium ...?
  • Please help! In the reaction of 1000 grams of cobalt metal wih excess potassium dichromate and sulfuric acid..
  • Please Help! In the reaction of nickel with concentrated nitric acid, the products are nickel (III) nitrate,?
  • Please help! On the basis of electron configurations, predict the formula of the Type I ionic compound ...?
  • Please Help! On the basis of electronegativity, list the following in order of increasing bond polarity...?
  • Please help! One of the methods for the determination of lead (II) is the titration of lead (II) solutions...?
  • Please help! One of the treatments for gangrene and "the bends", is hyperbaric oxygenation. This occurs in a..
  • Please help! Predict and explain which atom would have the higher second ionization energy:?
  • Please help! Predict and explain which element in a Group 16 is the least reactive?
  • Please help! Predict and explain which of the following pair is the more polar bond: I-Cl or Cl-F?
  • Please help! Predict how valence electrons might be arranged in the AsO4-3 ion. Are there any resonance forms?
  • Please help! Predict the Lewis structure(s) for the following: N2O5.?
  • Please help! Predict the Z number of the largest atom in Group 2 and explain your prediction?
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  • Please help! The first six ionization energies for the elemetns X and Y are shown in the table below.?
  • Please help! The Law of DuLong and Petit states that the heat capacity per mole of many metals is ...?
  • Please help! The Law of DuLong and Petit states that the heat capacity per mole of many metals is...?
  • Please Help! The specific heat of fusion of silver is 30.0 calories per gram and the specific heat of silver..
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  • Please help! Use VSEPR theory, predict and explain the bond angle between the iodine atoms in OI2?
  • Please help! Using the VSEPR theory, predict and explain the geometric structure of the hydrogen carbonate...?
  • Please help! Using the VSEPR theory, predict and explain the molecular structures of PbF4 and H2Se?
  • Please help! Using VSEPR theory, draw the structures for: NF3 and PI3.?
  • Please help! Using VSEPR theory, predict and explain the bond angles in BCl3 and SbF3?
  • Please help! What are the required steps to interpret mass spectrometry?
  • Please help! What is (are) the noble gas(es) that has (have) the same electron configurations as each of ...?
  • Please help! What simple ion is formed from the element Z=89? please explain?
  • Please help! Which of the following species is smaller: Rb or Rb+1? Why? please explain?
  • Please help! Why are the valence electrons of an atom the only electrons likely to be involved in ...?
  • Please help! Write the electron configuration for the last row of electrons for the element with Z=46?
  • Please Help!! I don't even know where to start.?
  • Please help!! Aluminum Boiling point!?
  • Please help!..exam tommorow!?
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  • Please help..Organic Chem question;?
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  • Please I want some help to learn HYSYS 3.2 software !!?
  • PLEASE PLEASE PLEASE PLEASE Rate Of Reaction IM DESPERATE!?
  • Please please solve: How much gas(in litres) will be produced at 0 celcius and 760 mm of pressure when 10g.
  • Please send me details about the usesof ingredients of egg shampoo its history and pictures relating to it?
  • Please sigh my petition?
  • Please solve: 105mL of pure water(at 4 celsius) is saturted with NH3 gas, producing a solution of density.
  • Please solve: 600mL of a mixture of ozone & O2 weighs 1g at NTP.Calculate the volume of ozone in the mixture.?
  • Please solve: A mixture of NaI and NaCl,when heated with H2SO4, produced the same weight of sodium sulphate...
  • Please solve: A partially dry sample contained 50% of silica and 7% of water. The original clay contained .
  • Please solve: To determine the NaCl content in commercial NaOH,2g of latter was dissolved in water and an .
  • Please tell me how the end use or purpose of a product affects its chemical formulation.?
  • Please tell me if I'm right .?
  • Please tell me the logic why we do weather test to check the quality of liquied petroleum gas(LPG).?
  • Please tell me the number of the largest atom?
  • Please tell me what kind of chemistry projest i should do?
  • Please tell me why the following statement is wrong "when entropy is increased, temperature also increases"
  • Please urgently help me with my short story?
  • Please Verify my Answer?
  • Please verify-chem problem?
  • Please will you tell me the formula of the ionization of water, acetic acid, and calcium hydroxide?
  • Please write the formula of the ionization of water?
  • Please! I need help in Chemistry, and explain it to me?
  • Please! I need help in Chemistry, and explain it to me?
  • Please! I need help in Chemistry, and explain it to me?
  • Please, can someone help me with redox reactions?
  • Please, for any one who is Very good at chemistry.?
  • Please,trying to understand boiling point, mass, intermolecular force affecting the ranking of H2Se, H2S, H2Te
  • PLEASE. tell me anything about entropy. I need to pass Chemistry.?
  • Please... help with transition metals!!?
  • PLEAsssseeee?
  • Pleez help me calculate the pH?
  • Plese tell me why this is wrong "Entropy equals to the disorder of the system"?
  • Pls find the molar mass of CuSO4 . 5H2O thank you very much?
  • Pls give me websites about organic chemistry??
  • Pls help me in my assignment in Chemistry 11 Nelson Pages 541-542 # 5 & 6.Thanks so much. I appreciate it.?
  • Pls help me in my assignment. What test could I perform to determine which one is saturated?
  • Pls help with chemistry!! thanks so much?
  • Pls use condensed structural structural formulas. Thanks very much.?
  • Pls use condensed structural structural formulas. Thanks very much.?This is another one...?
  • Pls... I need Help?
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  • Plz help i need 2 find names of these famous chemists. first right answers gets best answer.?
  • Plz help intro chem student... :)?
  • Plz help me . i need this urgent?
  • Plz help me write and balance these chemical equations?
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  • Plz help! Carbohydrate chemistry question.?
  • Plz help! exam tommorow!?
  • PLZ HELP...This Is Very Important?
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  • Plz tell me a good source of shortcuts of solving physics and chemistry numericals of class XII?
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  • Plzz help on chemistry?
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  • P-nitroaniline is more acidic or m-nitroaniline?
  • POH Question?
  • Polar bonds?
  • Polarity of a solvent?
  • Poluethene is a polymer of?
  • Polyatomic ions -- why are they called ions and not molecules since they consist of a bond between non-metals?
  • Polyatomic ions -- why are they called IONS and not MOLECULES?
  • Polycaprolactone (PCL) can dissolve in what solution??
  • Polyester is to airplanes as condoms is to .?
  • Polymer question?
  • Polymers and monomers?
  • Polymers are?
  • Polyprotic Acids question?
  • Positive ion + negative ion =?
  • Potassium in Bananas?
  • Potassium metabisulfite: is this safe?
  • Potassium metabisulfite: is this safe?
  • Potassium Nitrate Kno3 Stump Remover?
  • Potassium..formula of its oxide & the equation for its reaction with water forming a hydroxide compound?
  • Potential chemistry question?
  • Potential energy, kinetic energy?
  • Practice questions regarding pH, pKa, buffer systems, etc. Should be easy for someone in the know.?
  • Precipitate and Qc?
  • Precipitate calculations?
  • Precipitate predictions?
  • Precipitate Q?
  • Precipitate question?
  • Precipitate?
  • Precipitate?
  • Precipitation that becomes overly acidic ontains harmful levels of these acids?
  • Precisely how does one go about adding a hydroxyl group to gonane framework in Beta bond at C4 locant?
  • Predict and explain the geometric structure of the hydrogen carbonate ion?
  • Predict and explain which atom would have the higher second ionization energy: cesium or barium.?
  • Predict and explain which of the following pair is the more polar bond: I-Cl or Cl-F.?
  • Predict how valence electrons might be arranged in the AsO4 -3 ion.?
  • Predict the effect of each of the follwing on the indicated equilibrium system in terms of.?
  • Predict the major monobromination product of the following reaction?
  • Predict the most likely redox reaction in each of the following situations?
  • Predict the pH of the following solutions. Justify your predictions.a) NH4CL(aq) b) Na2S(aq) c)KNO3(aq)
  • Predict the Z number of the largest atom in Group 2 and explian your prediction?
  • Predict wheter a solution of each of the following salts is acidic, basic, or neutral.?
  • Predict whether each of the following pressure changes would favor forward reaction or reverse reaction...?
  • Predict whether solutions of the following salts would be acidic, basic, or neutral in pH?
  • Predicting flash-point of acetone solution in mixed solvent media?
  • Predicting whether Mg magnesium will have a +2 charge or a -2 charge..will it be a cation or an anion?
  • Preparation of dilute HCl.?
  • Pressure / Gases?
  • Pressure at end of reaction problem?
  • Pressure question in chemical?
  • Pressure vs volume problem?
  • Pretaining to a question I asked earlier...?
  • Principle of spectrophotometer?
  • Priodic table puns?
  • Problem caused by an acid/metal reaction?
  • Problem relate to titration?
  • Problem when using appropriate moles volumes and concentrations equation?
  • Problem with kid chemistry project?
  • Problems associated with the addition of Lime to the soil.?
  • Problems with Limiting Reactions in Stoichiometry?
  • Procedure for complete dissolution of the following materials?
  • Procedure for testing the Hardness of water?
  • Product of concentrations of H3O+ and OH- in water solutions?
  • Production of H2o is always?
  • Products formed...?
  • Professions that use chemistry?
  • Propane (C3H8) burns in oxygen to produce carbon dioxide and water vapor.?
  • Propanoic acid, CH3CH2COOH(aq), is a weak acid with a Ka of 1.3x10^-5 at 25 deg C.?
  • Proper name for 2-amino-3-methylpropane?
  • Properties of liquids?
  • Properties of metals?
  • Properties of solution and colloids?
  • Propose a reaction series that would produce 2-phenylbutane, starting with benzene and 1-benzene as reactants?
  • Protein Synthesized?
  • Proteins and Amino Acids Questions?
  • Protons electons and neutrons in strontium 84?
  • Prove that tap water contains dissolved solid impurities?
  • Prove that water consists of hydrogen and oxygen in the ratio of 2 atoms of hydrogen to 1 atom of water?
  • Pure or Impure Liquid??
  • Pure water contains?
  • Pure water contains?
  • Pure water is a relatively strong electrolyte. true or false?
  • Purity of a substance?
  • Put in decreasing order of leaving ability? 1. p-Toluenesulfonic acid 2. Acetic acid 3. CL 4. OH?
  • PV = nRt problem?
  • PVC is polyvinylchloride, a polymer made from H2C=CHCl. Give the structure of a segment of this polymer chain.
  • PVTn Problems?
  • Qns for lab report to be answer asap..?
  • Qns on biochemical test : Catalase reactions?
  • Qns on biochemical test : selective and differential media?
  • Qu about Fuels...?
  • Qualatative analysis lab?
  • Qualitative analysis?


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