Chemistry Questions and Answers

  • A weather balloon is filled with 4.0 liters of helium at 27 degree C and 1.0atm?
  • A website for chemistry regents explanations?
  • A) Has a reaction taken place?If so what kind of reaction? b) Which metal is more reactive metal X or metal Z?
  • A) What is pellagra? What are the concequences of ingesting too much niacin?
  • A. What is the recommended Daily intake of RDI for niacin? b) Create a list of foods that contains niacin?
  • A=1/2h(b+c) solve for b.?
  • A10.0 gram sample of which elements has the smallest volume at STP?
  • A2 CHEMISTRY practical today (AQA)?
  • AAS and air pollution control?
  • About acid and base?
  • About Bursen Burner?
  • About Caffeine and Paracetamol?
  • About cold water and warm water and which boils faster?
  • About how many calories are burned in half a liter of diesel?
  • About painkiller materials safety data sheets - MSDS's?
  • About science?
  • About standard operating system in pathology lab?
  • About the limiting reagent.?
  • About the steel wool / vinegar experiment?
  • ABS Plastic?
  • Absolute value of electrode potential -------------------- be determined?
  • Absorbancy?
  • According to Bohrs theory an electrons path around the nucleus defines its?
  • According to le Chatelier's principle, a system in equilibrium will tend to ______ the effects of change due t
  • According to molecular orbital theory, which of the following species is least likely to exist?
  • According to molecular orbital theory, which of the following species is the most likely to exist?
  • According to reference table N, which pair of isotopes spontaneously decays?
  • According to the Bronsted-Lowry definition, an acid is a substance that...?
  • According to the kinetic theory of gases, a gas can be compressed much more than a liquid or solid because...?
  • According to the kinetic theory, collisions between molecules in a gas.are what?
  • According to the octet rule, which are possible compounds of nitrogen and fluorine? (62)?
  • According to the octet rule, which are possible compounds of nitrogen and fluorine? (Select all that apply.)?
  • Acetone500mg in 25mlVF.Pipettedout 5ml to25ml and again 5ml to 25ml madeupwithDimethylformamide.whats the Ppm?
  • Acetylene gas, C2H2, used in welding, produces an extremely hot flame when it burns in pure oxygen according?
  • Acid - Base Reaction - How to calculate the resulting pH?
  • Acid &base?
  • Acid and base calculations?
  • Acid and Base Q?
  • Acid and Base questions?
  • Acid and base reactions...?
  • ACID AND BASE?
  • Acid and bases -help needed!?
  • Acid base and Ka Kb help! chemistry?
  • Acid chloride + amine = amide??
  • Acid digestion?
  • Acid on clear paper?
  • Acid problem solving.havn't learned it yet...but just wana go little ahead...teach?
  • Acid problems?
  • Acid rain can have a pH of 3.50. what is the H3O and OH concentration?
  • Acid Rain?
  • Acid Role-Playing in Sugar?
  • Acid Titration Problem Help?
  • Acid-Base Equilibria And Solubility Equibria #2?
  • Acid-Base Equilibrium?
  • Acid-base reaction?
  • Acid-Base Titration question?
  • Acid-base Titration..help...?
  • Acidic fizz drinks?
  • Acids and Bases ?!!...Plz help me?
  • Acids and bases question?
  • ACIDS AND BASES questions?
  • Acids and Bases!?
  • Acids and Bases... with math... please help, me out asap... thanks?
  • Acids and Bases...both corrosive to the skin and poisonous?
  • Acids and bases.?
  • Acids and bases.gah...?
  • Acids and bases?
  • Acids and bases?
  • Acids and bases?
  • Acids and bases?
  • Acids and Bases?
  • Acids and Bases?
  • Acids transfer the proton to other molecule according to?
  • ACIDS!! omg...need help?
  • Acids+ Metals ->Salts+________(gas)?
  • ACS organic Chemistry Questions?
  • Activation energy and rate of reaction?
  • Activation energy for the coal burning reaction?
  • Activation Energy question?
  • Activation Engergy question?
  • Active metal questions 2?
  • Active metal Questions?
  • Add to test BUFFER effectiveness in Chemistry?
  • Adderall vs. Cocaine?
  • Adding Chemicals together and balancing chemical equations?
  • Adding heat to the reaction H2+Br does what to the reaction?
  • Adding to nanoparticle solution?
  • Addition of acid/ammonia?
  • Addition of Hcl to 1-hexene gives you what?
  • Advanced methods of separating mixtures.?
  • Advantages of gas chromotography over TLC?
  • Advantages of oxygen bars?
  • Advantages/Disadvantages of Alka-Seltzer tablet over an analgesic tablet or caplet?
  • AgBr + Na2S2O3 = ? and Why is AgBr dissolved when placed in .5 M Na2S2O3 solution? Thanks?
  • Agitating a solution?
  • AGNO3 + H20 = .25% soulition / How many gms. do I add of AGNO3 to 250 ml. of H2O to create a .25% solution?
  • Agueous Potassium?
  • Ahh chemistry...help?
  • Ahhh Science Prac Assignment - please help?
  • AHHHH! Difficulty with half reactions.?
  • Air can be compressed but water cant why?
  • Air is a mixture of gases? what are they and in what percent?
  • Al(NO3)3 + 3NaOH --> Al(OH)3 + 3NaNO3?
  • Al(NO3)3 + 3NaOH --> Al(OH)3 + 3NaNO3?
  • Alcohol combustion...?
  • Alcohol Molecules/Hydrocarbons?
  • Alcohol under reflux?
  • Aldehydes/Ketones?
  • Aliphatic urethanes?
  • Alkaline hydrolysis?
  • Alkalis?
  • Alkalis??
  • Alkanes, alkenes, and alkynes are the three main families of aliphatic hydrocarbons. Thanks so much.?
  • Alkanes, alkenes, and alkynes are the three main families of aliphatic hydrocarbons.?
  • Alkenes, Alkanes and so on?
  • All atoms are made of electrons.in chackpiece electrons have movement being an non-living how it is possible?
  • All forms of energy are a combination of...?
  • All of the following are steps in the scientific method except...?
  • All of the following sets of quantum numbers are allowed EXCEPT?
  • Also wanted to know The bond order of Be2 in the molecular orbit theory would be 1.) 0 2.) 1 3.) 1.5 4.) 2.0?
  • Alternative Fuel For Aeroplanes?
  • Although hydrogen is common in living things, why isn't helium common in living things also?
  • Aluminum ??
  • Aluminum Chlorate or Aluminum Chloride?
  • Aluminum chloride and water?
  • Aluminum hydroxide reacts with sulfuric acid as follows:Al(OH)3 + 3H2SO4--> ...?
  • Aluminum metal melts...?
  • Aluminum Metal Question! HELP!!?
  • Aluminum reacts with oxygen...?
  • Aluminum sites?
  • Am i correct?
  • Am I doing this correctly? (enthalpy change)?
  • Amazing thing about rubber bands and heat?
  • Amino acid buffer question?
  • Amino acids?
  • Ammonia and nitric oxide (NO) react to form nitrogen and water. Write the balanced equation.?
  • Ammonia gas decomposes according to the equation: 2NH3(g)..N2(g) If 15.0 L of nitrogen is formed at STP, how?
  • Ammonia Help?
  • Ammonia water or aqua ammonia consists of ________ dissolved in water?
  • Ammonium chloride is solid and when heated from directly ammonia gas and chlorine gas. This process is:?
  • Ammonium metavanadate is useful for...?
  • Ammonium nitrate is a common ingredient in chemical fertilizers. Use the reaction shown to calculate the mass?
  • Ammonium nitrate is a common ingredient in chemical fertilizers.?
  • Among the following, the molecule with highest dipole moment is: (a)CH3Cl (b)CH2Cl2 (c)CHCl3 (d)CCl4....
  • Amount of Catalase & Hydrogen Peroxide for Measuring Rate of Enzyme Action?
  • Amount of heat required to change..?
  • Amu percentages?
  • Amu Question?
  • An acid is formed when carbon dioxide reacts in water. Can you help me write an equation?
  • An acid solution in which 98% of the acid molecules have been ionized by interaction with water is____________
  • An acid/base/pH problem involving sodium acetate?
  • An acid-base titration, equivalent quantities of hydronium and hydroxide ions are present at?
  • An additional question-precipitate?
  • An alcohol swab, lit on fire, why, after all of the alcohol has burnt off is the swap still rather wet?
  • An animal with a high surface-area-to-volume ratio of the body, and takes in all oxygen through its skin is a?
  • An aqueous solution of KCl would be?
  • An atom of an element that has the same number of protons but a different number of neutrons is called?
  • An element that reacts to the atmosphere?
  • An energy efficient electric fan converts a large portion of the eletrical energy that enters it into...?
  • An everyday organic acid that isnt asperin?
  • AN example of a heterogeneous mixture and an example of a homogeneous mixture.?
  • An example of a polyprotic acid is?
  • An increase in [H+] in moles/liter would result in?
  • An ionic compound ...?
  • An iron ore sample contains Fe2O3, and reaction of the ore with CO produces iron metal: Fe2O3+ 3CO -->2Fe+...
  • An Organic Chem question?
  • An organic compund that contains a carbon atom bonded to a hydrogen atom and double-bonded to an oxygen atom..
  • An oxide of a metalloid.?
  • An oxide of an element with electrons in 4 energy levels?
  • An oxidizing agent is -------------------------------of electron?
  • An unknown compound analyzes to be .. (39)?
  • An unknown gas is submerged in alcohol with a solubilty of 0.77 g/liter at 790 mmHg, what is its solubilty, in
  • An unkown metal makes a chloride MCl2. If... What is M?
  • An unsaturated hydrocarbon is?
  • Analytical Chemistry?
  • And what is the change in enthalpy for it?
  • Angular quantum number?
  • Angular quantum number?
  • Aniline + NaOH?
  • Aniline + NaOH?
  • Animal fat -- clear then transparent, increasing temperature?
  • Another Chem Question?
  • Another Chem Question? Plz help!!?
  • Another Chem Question-best answer goes to best explained!?
  • Another chemistry help question?
  • Another chemistry help question?
  • Another chemistry problem?
  • Another Chemistry Question...?
  • Another chemistry question?
  • Another chemistry question?
  • Another molecular models of atoms question- should be fairly easy if you know chem well.?
  • Another nuclear chem. question?
  • Another science question..?
  • Another Science Question?
  • Another solubility product q..thx heaps?
  • Another solution question?
  • Another TLC question?
  • Answer for tomorow plz (explain too :)?
  • Answer the following chemistry questions?
  • Answers for science help 9 questions?


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