Chemistry Questions and Answers

  • If it takes 7.2E-6 seconds for one wavelength of a wave to pass a stationary point, what is the frequency of t
  • If it takes helium gas 5 seconds to diffuse from a container, how long will it take oxygen gas (O2) to do so?
  • If it takes helium gas 5 seconds to diffuse from a container, how long will it take oxygen gas (O2) to do so?
  • If its possible for them to decafinate tea and coffee, why isn't it possible for them to decafinate chocolate?
  • If nothing sticks to teflon, why does the teflon stick to the frying-pan?
  • If salt is added to an acid or base rather than water will it still produce crystals?
  • If someone weights 0.050kg and displaces 60.6 mL of water. What would be the density?
  • If steel wool (iron) is heated until it glows and is placed in a ...?
  • if the density of a gas is 1.2 g/L at 745 torr and 20 degrees Celsius, what is its molecular mass?"?
  • If the density of water is 1.0g/mL, calculate the volume of water (mL) produced by the combustion of?
  • if the dose of a medicine is changed to x times the original value then how will the half-life change?
  • if the hydronium ion concentration of a solution is 1.63 x 10^-8 M, ...?
  • If the neutralization of 0.616g of KHP requires 31.47 mL of NaOH,?
  • if the periode of a wave is 1/5 second,the frequency of the wave is?
  • If the pKa of p-nitrophenol is 7.15, what fraction is ionized at pH 7.5?
  • If the pressure exerted by a gas at 25 C in a volume of 0.044L is 3.81 atm, how many moles of gas are present?
  • If the solid is A-Napthol and the liquid is Isopropyl alcohol would the volume change if there was air bubble?
  • If the solid is A-Napthol and the liquid is Isopropyl alcohol would the volume change if there was air bubble?
  • If the temperature of an aqueous solution of NaCl is increased from 20°C to 90°, which one below is true?
  • If their are 6 grams of carbon and 16 grams of oxygen, how many grams of carbon dioxide is produced?
  • If there are 6.02 x 1023 atoms per mole in any given substance, how many moles of helium are 4.70 x 1023 atoms
  • If there is 0.25 mol oxygen gas, 0.75 mol nitrogen gas, and 1.5 mol CO2 gas in a mixture...?
  • If there is 3 grams of carbon and 8 grams of oxygen how many grams of carbon dioxide is produced?
  • if there is 30 ml of water, what is its weight in grams?
  • If there is a fire, and a fire extinguisher is in the room, will the heat cause it to explode?
  • if there is a mixture of fluorene, fluorenol, fluorenone are separted on a TLC plate using methylene chloride.
  • if u put 3 ...?
  • if water and ethanol are both polar substances, then y iznt ethanol considered to be a universal solvent?
  • If water is h20 .what is ice? is it the same?
  • if water is wet what would wet water be dry?
  • If we are burning ethanol, how many g of O2 are required for the combustion of 421 g of ethanol?
  • if we increase pressure, what happens to the viscosity of a fluid?
  • If we manage to build "steady" molecules with big numbers at periodic table like 125,130,...what they will be?
  • If we mix SnI2 with water and SnI4 with water what's the the chemical raction equations for these 2 reactions?
  • If we were to say that two processes were interdependent, what would we mean by that?
  • if you add baking soda to a few drops of bromothymol blue indicator what color does it turn?
  • If you added Oxygen and set hydrocarbon molecules on fire, what would you get?
  • if you are asked to draw the stereoisomers of a cyclopropane with one chloro- and one bromo- subsstituent?
  • if you are given nickel (III) nitrate hexahydrate and soduim carbonate yields nickel carbonate,what is the.
  • If you are going to make a 1M solution of AgNO3, you will dissolve ___g in 1000 ml H2O?
  • if you are in chemistry lab and a student get cutted by any sharp thing then which substance will you use?
  • if you are looking to do mass to mass conversions...?
  • If you combine stainless steel with gold, does that make stainless gold?
  • If you correct me this exercise about volume I'll give you 10 points?
  • If you could be a single compound would you choose to be a ionic compound or a molecular compound and why?
  • If you had removed Ag1+, Hg22+, & Pb2+ by adding HCl, which could you seperate by adding H2CO3?
  • If you had removed Ag1+, Hg22+, & Pb2+ by adding HCl, which could you seperate by adding H2SO4?
  • If you have 6.0 mol of Al, how many moles of O[sub 2] are needed for complete reaction?
  • If you have a 15.32 gram sample of brass, and it's 77.0% Cu by mass, how many grams of Cu do you have?
  • If you have rhesus negative blood?
  • If you have to list physical properties of an atom, what does it mean and what are some examples?
  • if you spilt a strong acid on a work surface how would you deal with it?
  • if you superheat wood in an oxygen free environment will it turn to liquid then gas?
  • If you were only given this info, could you calculate the Activation energy?
  • If you were to put chlorine and sodium separately and simultaneously in water, what would happen?
  • I'll Give Who ever answers this question 1st 10 points! (must be right)?
  • illustrate with equation the reaction of Br2 in methylene chloride with acetylene.?
  • im am doing a report on polonium and i need to know some o the uses of the element?
  • im building a model of an atom, are the protons and neutrons bigger than the electrons?
  • I'm confused about ppm and g/l?
  • i'm desperate to understand how to do this so i am reposting please help asap?
  • im doing a science porject, what it the most interesting element in the periodic chart to do a powerpoint on?
  • Im getting a wrong answer when I calculate this. Can you calculate this?
  • I'm having a test to get into honors chemistry. What should I expect to be on it??
  • Im in the 8th grade and want to be a mix between a physicist and a chemist. what do i do?
  • I'm interested in Solidified Oxygen. Can it be made solid? and Stable?develope a way to ha?
  • I'm looking for a database for brief descriptions and uses of all the elements, does anyone know any websites?
  • Im so scared of going blind!...help?
  • I'm stuck with my Chemistry homework!?
  • I'm trying to find what are the [H3O+] and the pH of the solution?
  • importance of specific gravity measurement?
  • IMPORTANT chem question?
  • in a calorimeter the energy content of a substance is calculatred from a measure of the temperature change in?
  • in a covalently bonded molecule, the number of electrons that an atom shares with others is usually equal.?
  • In a double-replacement reaction, the___.?
  • In a flame is the combustion zone the part which appears blue?
  • In a molecule with covalent bonding?
  • in a nuclear equation only nuclei are represented - true or false?
  • In a polyatomic ion, where is the charge located?
  • in a polygon the number of diagonals is 54. the number of sides of the polygon is?
  • In a separatory funnel, why does benzyl alcohol go into the hexane? Why not nezoic acid go into the hexane?
  • In alkanes, what is the strongest type of intermolecular force present in the pure liquid?
  • In an electrochemical cell does the voltage change?
  • In an experiment where you have a titration curve for a weak acid-strong base reaction...?
  • In an investigation of the electronic absorption spectrum of a particular element, it is found that a photon?
  • In an ion compound, eg. Lithium Chloride, what type of ion is the lithium part called, and the chloride part?
  • In balancing an equation.. does the coefficient count for the whole formula?..?
  • In blood both oxygen and iron r present then why the iron dos'nt get rust ?
  • in carbon reduction method it is said that only those metal oxides are converted to metal by this method which
  • In CH3 (CH2)12 CH3 there are 3 elements and 44 atoms... How is that?
  • in CH3COOH, which hydrogen atom is ionized?
  • In chemical terms, why doesn't gasoline mix with water?
  • in chemistry lab, we removed the fat from chips (corn chips) and then compared the percent of fat?
  • in chemistry! what is a buffer solution?
  • in chemistry, what does "k" stand for?
  • In combustion of hydrocarbons with excess air, will carbon monoxide form?
  • In electrophoresis, is the amount of acrylamide like the pH gradient?
  • In finding pH of H2SO4 do we have to add the H+ produced by H2SO4 to alpha when subtituting Ka ?
  • in fluorescence spectroscopy, why the light source is placed vertical to the sample?
  • In general, which reaction(forward, reverse, or neither) is favored if the value of K at a specified temp is?
  • In layman's terms, please explain Critical Micelle Concentration (CMC) in Chemistry?
  • In layman's terms, what does "torr" mean?
  • in nature processes tend to occur that lead to a higher energy state?
  • In nuclear fission bombs.??
  • in order 4 hydrocarbon molecule 2 absorb visible colors, it must have @ least _ aleternating dble & singlebond
  • In order to double the average energy of the molecules in a gas at 200 K,?
  • In real chemical system, what factor would control the relative concentrations of reactants and products...
  • In Science what does Hardness mean ?
  • in the book tale of desperpo how does people react to miggery sow what she will be one day {give me 2 people?
  • In the case of KBr and H2O which is the solute and which is the solvent?
  • In the chemistry lab, if the atomospheric pressure is decreased what happens to the boiling point? Why?
  • In the context of chemical changes, what is meant by the 'heat of reaction'?
  • In the dehydration of hydrated salt, the sample was slightly moist because of high humidity...?
  • In the electrolysis of molten NaCl, the substance liberated at the anode (positive electrode) is?
  • in the equaion 2Al2O3 ->4Al + 3O2?
  • in the ethanol dry milling process, how do i determine the viscosity of a mixture of corn and water?
  • In the following nuclear equation, identify the missing product?
  • In the following reaction, is the H2SO4(aq) oxidized, reduced or neither, explain.?
  • In the following relationships, Q stands for quinine and QH + for its protonated form?
  • In the following relationships, Q stands for quinine and QH + for its protonated form?
  • In the gas phase one mole of CH4 and one mole of H2O gas react?
  • In the gas phase one mole of CH4?
  • In the gas phase one mole of N2 and three moles of H2 react to form two moles of NH3 .?
  • in the hydrogen spectrum, what is the wavelength of light associated with the n=2 to n=1 electron transition?
  • In the lab,a girl has a sample of chromium nitrate. How should you she attempt to decompose this compound?
  • In the periodic table which columns are negative and positive?
  • in the periodic table, the atomic mass of fluorine is given 9 significant figures, whereas oxygen is given 6?
  • In the reverible reaction, the difference between the activation energy of the forward reaction..?
  • In the tropics, water will condense in human lungs when the temperature and relative humidity are too high. Us
  • In there anyone who is an expert in food irradiation?
  • In this double replacement reaction, what would be the product?
  • In this picture, how are the other 2 F and Cl bonded to the Carbon?
  • In titration how do you calculate the concentration?
  • In TLC, which is better; higher value of Rf or smaller value of Rf?
  • in VSEPR theory, which repels other electron groups more strongly, a bound are non-bound eletron pair?
  • in wat two ways is heat involved in chemical change?
  • In what household products can I find barium nitrate or strontium nitrate?
  • In what states (phases) can water be found?
  • in what way are liquids similiar to solid? or liquids similiar to gases?
  • In what way does a correctly balanced chemical equation agree with the law of conservation of matter?
  • in what way is it possilbe to sink ice... only water can be use..no adding of any chemicals or any substance?
  • In which compounds are the bonds most polar?
  • in which hydrolysis of starch by salivary amylase, what mechanism was involved?
  • In which molecule is the nitrogen-nitrogen bond shorter? Hydrazine or in laughing gas?
  • In which of the following processes are covalent bonds broken?
  • in which places of india is sodium silicate made?
  • In which reaction will decreasing the pressure cause more reactants to form?please!?
  • In with what materials or elements can heat be concentrated if possible?
  • Incomplete combustion of Ethyne Q?
  • Incomplete combustion Q?
  • increasing pressure of a liquid lowers its boiling point -t/f?
  • Indentify limiting reactant when 12.5L of H2S at STP bubled through solution containing 24.0g of KOH to form..
  • index refraction of silicate flint glass?anyone knows?
  • Indicate whether these are true or false.?
  • Industrial Production of Chemicals?
  • Industrially, why is ammonium nitrate so important?
  • info about despirtion of light and websites for the sub!!plzzzzzz i need help?
  • Info about mendelevium!?
  • information about chemical engineering-Distillation tower?
  • Information on: 3Pb(NO3)2 + 2(NH4)3PO4 = Pb3(PO4)2+6NH4NO3.?
  • Information on: 3Pb(NO3)2 + 2(NH4)3PO4 = Pb3(PO4)2+6NH4NO3.?
  • Inorganic chem. rate Law question(please help!)?
  • Inorganic chemistry pH question?
  • Inorganic Chemistry, help?
  • Integrated Rate Law Question...?
  • Interior walls white acrylic paint composition ?
  • Intermolecular Force Question. Check My Work! Confused a little...?
  • intermolecular force(s) which are most important in determining the normal physical properties of these:?
  • Intermolecular Forces - Different Types? Help. Check My Work!?
  • Intermolecular forces on camphor?
  • Intermolecular or intramolecular?
  • Interpreting percent error in hydrate lab?
  • Interseting facts aobut helium?
  • Intra/intermolecular?
  • Intro chemistry help please?
  • investigatory project(candle)?
  • Investingation: concentration of a vinegar sample.. Interesting Facts?!?
  • ion concentration- A solution is made by dissolving 0.013 mol ZnCl2 (s) in enough water to form 700. mL of sol
  • ION Strength?
  • Ionic and covalent compound?
  • Ionic & Covalent?
  • ionic compounds?
  • ionic compounds?
  • ionic compounds?
  • ionic compounds?!?
  • Ionic crystals?
  • ionic forms of arsenic?
  • Ionic, Covalent compounds?
  • ionization and concentrations?
  • Ionization energy question?
  • IR spectroscopy?
  • iron (II) nitrate and iron (III) nitrate?
  • iron and lead nitrate react.?
  • Iron is laced into water & turns into iron (II) compound. What is the balanced equation? PLEASE ANSWER!!?
  • Iron ore (Fe2O2) is refined to iron (and carbon monoxide) by reacting the iron ore together...HELP!?
  • Iron ore (Fe2O2) is refined to iron (and carbon monoxide) by reacting the iron ore...HELP!?
  • Iron ore (Fe2O3) is refined to iron (and carbon monoxide) by reacting the iron ore...HELP!?
  • is "is comprised of" or "comprises" proper?
  • Is "love at first sight" a chemical or natural reaction?
  • Is (delta)G^0 always constant for a given reaction?


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