Chemistry Questions and Answers

  • how I can prepare thiobarbituric acid for detection of malondialdehyde?
  • How I can produce H2O2 or from where I can get the methodology to produce H2O2?
  • How important is aluminium in Australia?
  • How is a titration performed?
  • How is a water molecule built up?
  • how is acrylamide solution useful for textile industries?
  • how is ammoni gas is prepared?
  • How is ammonium nitrate and Redox Reactions used in industry?
  • how is ammonium sulphate made in industrys?
  • How is an empirical formual like and unlike a molecular formula?
  • How is an insoluble hydroxide tested for amphoteric behavior?
  • how is aniline produced from anilinehydrochloride?
  • How is energy turned into heat?
  • How is food cooked on molecular level?
  • how is Gadolinium mined or collected?
  • how is gadolinium refined to pure?
  • How is helium made?
  • How is Hydrogen produce in Industry?
  • How is Iron Sulphate made industrially?
  • How is it possible for a compund to have both ionic and covalent bonds?!?
  • How is it possible that a person can feel cold after an endothermic reaction if the reaction absorbs energy?
  • How is liquid oxygen produced?
  • how is mass made?
  • how is natural gas separated into its various components?
  • how is nitrogen harmful and / or helpful in the human body?
  • How is Physostigmine Synthesized?
  • how is platinum produced?
  • how is polythen made?
  • how is pure oxygen gas made??
  • How is radioactivity taken into the body?
  • How is Rocket engine fuel ignited?
  • How is salt formed ?
  • How is Silver Chloride used industrially?
  • How is sugar cane separated to form sugar?
  • How is sugar purified in India?
  • How is Sulphanilamide produced in industry today?
  • how is the bomb constructed to ensure that it does not go off immediately?
  • How is the calorie content of foods experimentally measured?
  • how is the colour in fireworks put in?
  • How is the diffusion of oxygen into blood a chemical change?
  • how is the geometry of simple molecules determined using the VSEPR model?
  • How is the Gibbs Free Energy (Delta G) Related to the Reaction Rate of a Chemical Reaction?
  • How is the Kf of deionized water different from the Kf of tap water???
  • How is the law of conservation of mass applied in finding the empirical formulas of the hydrates?
  • How is the Nitrogen gas seperated from other gasses in the air?
  • HOw is the number of free electrons determined in a metal?
  • how is the partial pressure of a gas in a mixture calculated?
  • How is thermocol made & how is it given the different shapes?
  • How long does the chemicals from a cigerette stay in the body?
  • How long does it take for the concentration to drop?
  • How long does it take water to freeze?
  • How long does Liquid Nitrogen last in a Dewar canister?
  • How long does water have to be boiled to be safe?
  • how long will it take a person to run out of a 100 pound oxygen tank?
  • How long would it take for 1.50 moles of water at 100 C to convert steam if heat were added at 19 J/s?
  • How man ml if you know the mass produced?
  • how manny moles of oxygen are in .5 mole of Sodium metaperiodate ?
  • How many "mm" (Mililleters) in a pound?
  • How many acidic hydrogens do the molecules H2CO3 and H3PO4 have individually? Are these acids strong or weak?
  • How many atmospheres melt diamond?
  • how many atoms are in propylparaben?
  • how many atoms are there in a grain of sand aprox.?
  • how many atoms are there in a mole?
  • How many atoms are there in each of the following?
  • how many atoms in vinegar?
  • How many beta sheet and alpha helix does the Rossmann fold have?
  • How many board feet of wood would be required to replace 1500 gallons of water for heat storage?
  • How many calcium atoms are in 16.2g of calcium?
  • How many CO2 molecules are in 0.10 mole of CO2?
  • How many configurations are possible for the formula C2H5ClO?
  • How many covalent bonds are in a covalently bonded molecule containing 1 phosphorous atom and 3 chlorine atoms
  • How many cu m of butterfat must be removed from 500 cu m of milk containing 10% butterfat to reduce its conten
  • How many cubic feet of oxygen (O2) are needed to convert...?
  • How many degrees of temperature rise will occur when a 25.0 g block of aluminum absorbs 10.0 kJ of heat?
  • how many different elements make up everything on earth?
  • How many different hosehold items can be used to cause the old "Vinegar and Baking Soda Boom"?
  • How many different isomers are possible for a hydrocarbon with the molecular formula C4H10?
  • How many different structual formulas can be written for C6H14?
  • How many different structural formulas can be written for C5H11Cl?
  • How many electrons are in bonding orbitals ?
  • How many electrons are in bonding orbitals of N2-2 ?
  • How many electrons are shared by two atoms that form a triple bond?
  • how many electrons can be described by the quantum numbers n=3, l=3, ml=1?
  • How many electrons does a clorine (Cl) atom need to complete its octet?
  • How many electrons does it take to get the same mass as a proton?
  • How many electrons, nutrons and protons does Zinc have?
  • How many electrons,protons, and neutrons are in helium?
  • how many electrons...?
  • How many elements and how many atoms are indicated by the formula?
  • how many elements are found on earth?
  • How many elements have been "properly" named so far by the IUPAC?
  • how many enzymes are in one single cell? Why do we need so many?
  • how many enzymes are there in one single cell?
  • how many f orbitals have the value n=3?
  • How many fundamental vibrational modes do allene and acetylene have?
  • How many g. of NaCN would you need to dissolve in enough water to make exactly 375 mL of solution w/ a pH 10?
  • how many gallon in 250 k/g drum (liquid) with density of 1.40g/ml @25 deg c?
  • How many grams are in 1.5x10^25 molecules of CO2? Whats the volume of CO2 @ STP?
  • How many grams are in one kilojoule?
  • how many grams are in one U.S. pound ( 1 lb. )?
  • how many grams in 1 liter?
  • how many grams in 100 ml of water?
  • how many grams in 500ml of water?
  • How many grams of PbCl2 will disslove in 0.803 L of a 0.670 M Pb(NO3)2 solution ?
  • how many grams of Al are in 21.7g of Al2O3?
  • How many grams of antifreeze, C2H4(OH)2, would be required per .5kg of H2O to prevent the water from...?
  • how many grams of Au2S can be obtained from 1.17 mole of Au?
  • How many grams of C?
  • how many grams of calcium hydroxide are needed to react completely w/ 50g hydrochloric acid according to this?
  • How many grams of carbon dioxide are contained in 550 mL of this gas at STP?
  • How many grams of CO2 are in one cc of dry ice?
  • How many grams of CO2 are produce if 25.0 grams of C6H6(benzene) was burned?
  • How many grams of copper oxide may be reduced by 10 grams of hydrogen?
  • How many grams of H2(g) react with excess Sn02(s) if 154. Grams of Sn are produced SnO+2H2(g) Sn(s)+2h20(g)?
  • how many grams of H2O do I need to make 4 grams of hydrogen gas and 32 grams of oxygen gas?
  • How many grams of HBr must be dissolved to make 1.0 L of 2.0 M HBr solution?
  • How many grams of hydrogen are produced by the action of hydrochloric acid on 50 grams of zinc?
  • How many grams of KCL can dissolve in 100.0g of water at 65 C?
  • How many grams of lead in a 0.500 ppm lead containing, 8.0 fluid ounces of fruit juice?
  • How many grams of mercuric oxide are needed to produce 100 liters of 02?
  • How many grams of mercuric oxide are needed to produce 100 liters of O2?
  • How many grams of mercuric oxide are needed to produce 96 grams of oxygen?
  • How many grams of MgCl2 do I need to make a solution of 0.05 M Mg 2+ that is 14000 liters?
  • How many grams of NaCN would you need to dissolve in enough water to make exactly 375 mL of solution with a pH
  • How many grams of NaCN would you need to dissolve in enough water to make exactly 375 mL of solution with a pH
  • How many grams of NaNO2 form when 599 g NaNO3 react? The yield is 85% 2 NaNO3(s) 2 NaNO2(s) + O2(g)?
  • How many grams of NaOH are contained in 270.0 mL of a 0.550 M sodium hydroxide solution?
  • How many grams of NaOH is needed to make 4 L of a solution with a pH of 7.4?(molecular wt. of NaOH is 40 g/M)?
  • How many grams of oxygen are needed to react completely with 10 moles of methane(ch4)?
  • How many grams of PbCl2 will disslove in 0.725 L of a 0.626 M Pb(NO3)2 solution ?
  • How many grams of phosphine (PH3) can form by the reaction of 33.0 g phosphorus and 90.0 L H2 gas at STP?
  • How many grams of phosphorus can be make from 100g of P2O5 using the following reaction 2P2O5+10C-->P4+10CO
  • How many grams of phosphorus react with 36.5 L of O2 at STP to form tetraphosphorus decaoxide?
  • How many grams of salt added to water would equal 1 mol?
  • How many grams of salt, sodium chloride, are contained in 1000.0 mL of ocean water, if the concentration is 0.
  • How many grams of sodium chloride do you need to make 125mL of a 1.5 M solution?
  • How many grams of sodium acetate were added ?
  • How many grams of sodium acetate were added ?
  • How many grams of sodium acetate were added ?
  • How many grams of sodium chloride are required to react with 196 grams of H2SO4?
  • How many grams of solid BaSO4 form when 25.0 mL of 0.160 M BaCl2 reacts with 68.0 mL of 0.055 M of Na2SO4?
  • how many grams of solute are needed to prepare 100.0 ml of a 155 ppm solution of urea in water?
  • How many grams of solute are present in 90.0 mL of 1.33 M CoSO4?
  • How many grams of sugar, C12H22O11, are present in 0.500 moles of sugar?
  • How many grams of sulfur (S8) would have to be dissolved in 110.0 g?
  • How many grams of sulfur (S8) would have to be dissolved?
  • How many grams of sulfur (S8)?
  • How many grams of table salt would have to dissolved in 120.0g of water to lower the freezing point by 1.30* C
  • how many grams of TNT, C7H5N3O6, are there in 0.665 moles?
  • How many grams of water should you add to 32.5 g of sucrose, C12H22O11, to get a 0.850 m solution?
  • How many grams of zinc chloride are produced when 3255 grams of zinc react with hydrochloric acid?
  • How many grams?
  • How many hours will it take to reduce the concentration to 1 / 64 ... I dont even know how to attept this,help
  • How many hydrogen atoms are in a molecule of sulfuric acid (H2SO4)?
  • how many hydrogen atoms are in C=C=C=C?
  • how many hydrogen bonds hold RNA and DNA together?
  • How many Hz are in 350 GHz?
  • How many inner, outer, valence electrons that are present in an atom of Fe and of F?
  • How many iron atoms are in 2.0 moles of iron?
  • How many isomers are there for the compound C14H30?
  • how many Killogram are in a gram?
  • How many Kilograms of iron can be recovered from 639 kilograms of the ore Fe2O3?
  • How many kJ are removed to convert 1.75 moles water from liquid at 0°C to solid at 0°C?
  • How many kJ heat absorbed when 1 L H2O heated from 18 degrees C to 85 degrees C?
  • How many L of hydrogen chloride may be produced by reacting sulfuric acid with 174 g of sodium chloride?
  • How many Liters of a 0.1154 M HCl solution are required to neutralize 0.4075 grams of TRIS?
  • How many liters of hydrogen are needed to produce 100 liters of ammonia by direct combination with nitrogen?
  • How many liters of hydrogen are needed to reduce 120 grams of copper oxide?
  • How many liters of hydrogen sulfide may be produced from 264 grams of ferrous sulfide?
  • How many liters of hydrogen sulfide may be produced from 264 grams of ferrous sulfide?
  • How many liters of hydrogen sulfide may be produced from 264 grams of ferrous sulfide?
  • How many liters of oxygen may be obtained by electrolysis of 900 grams of water?
  • How many lone pairs are on the central atom of AsF5?
  • how many micromol are in 1.5 nanograms of a substance whose mol weight is 323 ?
  • how many milliliters are in a cup?
  • How many milliliters of 0.155 M HCl are needed to neutralize completely 45.0 mL of 0.101 M Ba(OH)2 solution?
  • how many milliliters of 0.400M HBr solution can be made from 50.0 mL of 8.00M HBr solution?
  • How many milliliters of 0.560 M NiCl2 contain 3.00 g of solute?
  • How many milliliters of 0.750 M Pb(NO3)2 solution are required to react completely with 1.00L of 2.25 M NaC?
  • How many milliliters of 1.50 M H2SO4 are needed to neutralize 25.0 g of NaOH?
  • How many milliliters of 1.50 M KOH solution are needed to supply 0.130 mol of KOH?
  • How Many ml of 0.150 M Hydrochloric Acid Are Required to Neutralize 0.250 g of Diethylamine?
  • how many mL of a stock solution of...?
  • How many ml of cyclopentadiene can be obtained from 20.0 ml of dicyclopentadiene if the mass of cyclopentadie?
  • how many ml of H are produced by the reaction of 0.75g of sodium metal with H2O?
  • How many mL of HCL do I need to make a 1M solution ( 1 L) ?
  • How many ml of HCl would you need to dissolve in water to produce 1L of 1 M of HCl?
  • How many ml of water should be added to 80 ml of concentrated formaldehyde to obtain a sol'n of 10% formalin?
  • how many ml's needed for 18.4M of H2SO4 to prepare 600ml of .10M of S2SO4?
  • How many molecules are there at s.t.p in 280cm of nitrogern gas?
  • how many molecules are there in 230 grams of Co Cl2?
  • How many molecules in one drop of water?
  • how many molecules of ATP are produced in the complete oxidation of stearic acid?
  • How many molecules of oxygen are represented by this formula?
  • How many molecules of water are present in 6.0g of water?
  • How many moles and grams of Fe(SO4) are in a 300 mg tablet?
  • How many moles and numbers of ions of each type are present in the following aqueous solutions?
  • How many moles are in 3.8 mg of Na2HPO4?
  • How many moles are in 50.0 g of each of the following substances:?
  • how many moles are in 6.27 x 10^24 formula units of sodium nitrate?


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