Chemistry Questions and Answers

  • How many liters of O2 (g) are needed to react completely w/ 56.0 L of CH4 (g) at STP to produce CO2 (g) and?
  • How many liters of O2 are necessary to consume 340. g of C2H5OH in the following reaction at STP?
  • How many liters of O2 are necessary to consume 425 g S in the following reaction at STP? S + O2 庐 SO2?
  • How many liters of oxgen are required to produce two liters of water at STP?
  • How many liters of oxygen are necessary for the combustion of 277 g of carbon monoxide?
  • How many mg are equal to 1 ml?
  • How many mg's are in a gram?
  • How many milliliters of .45M hydrochloric acid must be added to 25.0 mL of 1.00 M potassium hydroxide to make?
  • How many milliliters of .45M hydrochloric acid must be added to 25.0 mL of 1.00 M potassium hydroxide to make?
  • How many milliliters of 1.00 M NaCl is needed to make 2.86 L of 0.146 M NaCl solution?
  • How many milliliters of 17.8 M H2SO4 are required to react with 257 mL of 2.65 M Al(OH)3 if ...?
  • How many mL of .120 M HCl are needed to completely neutralize 50.0 mL of .101 M Ba(OH)2 soluti...?
  • How many mL of .45M hydrocholric Acid solutn mst be added to 25mL of 1.25M KOH solutn in order to neutralze it
  • How many mL of 0.15 M HCl(aq) are needed to neutralize a 66.5 mL solution of 1.3 M NaOH?
  • How many mL of 0.5 M HCl(aq) are needed to neutralize a 196 mL solution of 0.75 M Ba(OH)2?
  • How many mL of 0.65M HNO3 are needed to neutralize 50 mL of 0.90M Ca(OH)2?
  • How many mL of 3M HCl are needed to make 300 mL of 0.1M HCl?
  • How many ml of 5N solution can be made from 50gm of CaCl2?
  • How many ml. of .112 M Pb(NO3)2 are needed to completly react w/ 25.0ml of .105 M Kl? GIVEN: Pb(NO3)2(aq)+?
  • How many mls of 2-mercaptoethanol do I need?
  • How many molecules are contained in the following?
  • How many molecules of H2O are in 1 fluid gallon of water?
  • How many moles are in 0.198 L of 4.87 M CaCl2 solution?
  • How many moles are in 1.39 L of a gas if the molar volume is 58.9 L/mol?
  • How many moles are in 3.01 X 10 to the 23 power of hydrogen?
  • How many moles of Al(OH)3 are needed to neutralize 0.40mol of hydrochloric acid?
  • How many moles of argon are there in 20.0 L, at 25C and 98.8kPa?
  • How many moles of calcium chloride in 21.0L of 0.25 M solution of calcium chloride?
  • How many moles of calcium hydroxide are present in the reaction?
  • How many moles of carbon atoms are there in 0.500 mole of C2H6?
  • How many moles of carbon were present in the 100g sample?
  • How many moles of Cl- ions are present in 269 mL of a 0.212 M FeCl3 solution?
  • How many moles of Cr are in 156g of the element?
  • How many moles of Fe2+ can be oxidized by 0.043 moles MnO4-?
  • How many moles of gas at STP must have used to fill that room?
  • How many moles of H2 gas are produced by each student?
  • How many moles of H2O are produced when 1.0 mole of Mg(OH)2 react with 1.0 mole of H2SO4?
  • How many moles of H2SO4 are req to produce 12.7 mol of H2? if there is 1g of H2 produced, how much H2SO4 ...?
  • How many moles of HCL are in 20 drops if the solution is 0.10 M? Assume 20 drops of solution equals 1.0 mL?
  • How many moles of hydrochloric acid are present in reaction?
  • How many moles of hydrogen are required to produce 8.50 moles of ammonia?
  • How many moles of hydrogen are needed to completely react with two moles of nitrogen?
  • How many moles of hydrogen atoms are there in 0.5 mol of CH3CH2OH?
  • How many moles of hydrogen gas are collected in a flask that has a volume of 0.50L at a pressure of 250.0KPa..
  • How many moles of hydrogen were presented in the 100g sample?
  • How many moles of iron could be produced from the reaction of 10 mol Fe2O3 and 25 mol of CO?
  • How many moles of K2SO4 are in 15.0 g of K2SO4?
  • How many moles of KCI are present in 95.3 mL of 2.10 M KCI?
  • How many moles of KCI are present in 95.3mL of 2.10M KCI?
  • How many moles of KHP are in a 1.200g sample of KHP?
  • How many moles of magnesium are needed to react with 16g of O2?
  • How many moles of magnesium oxide are in 2.50 x 10^25 formula units of MgO?
  • How many moles of NaOH are in 100.38mL of NaOH?
  • How many moles of NaOH are required to neutralize 1.254x10^-3 moles of oxalic acid dihydrate?
  • How many moles of NO3- ions are present in 271 mL of a 0.521 M Al(NO3)3 solution.?
  • How many moles of notrogen molecules are in 112 grams?
  • How many moles of oxygen are needed to react with barium to produce 23 moles of barium oxide?
  • How many moles of oxygen gas are needed to react with 9 moles of acetylene?
  • How many moles of oxygen gas can 30. g of hydrogen peroxide ( H2O2) produce, if decomposition is complete?
  • How many moles of potassium hydroxide are needed to completely neutralize 1.56 mol of nitiriic acid?
  • How many moles of potassium hydroxide are needed to completely neutralize 1.56 mol of nitric acid?
  • How many moles of potassium hydroxide are needed to completely neutralize 1.56 mol of nitric acid? AND?
  • How many moles of SO2 gas are contained in a 4.0 L container at 450K and 5.0 kPa?
  • How many moles of SO2 gas are contained in a 4.0L container at 450K and 5.0kPa?
  • How many moles of the compound is in 10ul solution if we are given a compund with concentration of 10 moles/l?
  • How many moles of water are produced? How many grams of potassium chloride?
  • How many moles of water, H2O, are present in 75.0 g H2O?
  • How many moles of Zn are contained in 11mg of Zn?
  • How many mols of He gas are in a balloon of 44.8 L of He?
  • How many neutrons are in the element Rhoidum?
  • How many neutrons will carbon have if the mass number is 13?
  • How many nitrite ions are in the formula for aluminum nitrite?
  • How many number of atoms are there in 1 gram of acetic acid?
  • How many numbers of significant figures are in this measurement?
  • How many of each type of atom is represented by the formula Al2(SO4)3??
  • How many oxygen atoms are in one formula unit of beryllium nitrite? HELP!eekk?
  • How many paperclips can the surface tension hold?
  • How many photons are in one joule?
  • How many photons per second are emitted from....?
  • How many protons and neutrons are in the nucleus of lithium?
  • How many protons and neutrons are there in a hydrocarbon?
  • How many protons are in an atom with the atomic number of 5?
  • How many protons does an atom with an atomic number of 23 and a mass of 51 have?
  • How many protons neutrons and electrons in nitrogen-14andcesium-137?
  • How many protons, neutrons, and electrons are present in each of the following atoms?
  • How many protons, neutrons, and electrons are present in each of the following atoms?
  • How many protrons and nutrons are in a potassium nuclius?
  • How many pure elements are there? 112?
  • How many resonance structures does C2H2 have?
  • How many resonance structures does N3- have ?
  • How many resonance structures does NH4+ have?
  • How many sig figs?
  • How many sigma (蟽) bonds and pi (蟺) bonds are in acetic acid?
  • How many significant figures does this have?
  • How many stereoisomers of 2,3-dichlorobutane are possible? 1. none 2. two 3. three 4. four?
  • How many tablespoons in an ounce?
  • How many tablespoons in an ounce?
  • How many teaspoons are in one gram?
  • How many times greater is the hydronium ion concentration in natural rainfall compared to pure water [H2O]?
  • How many total bonds are in one molecule of hydrogen cyanide?
  • How many total number of atoms are in a molecule of ammonium chloride?
  • How many unpaired electrons are on a Sulfur ion? How do you know?
  • How many unpaired electrons are there on a Co^+2 ion?
  • How many valence electrons and what kind of charge does titanium have?
  • How many valence electrons are in each group? (1,2 and 13-18) Where are valence electrons located in the atom?
  • How many valence electrons are in the electron-dot structures for the elements in group 3A(13)?
  • How many valence electrons are in the Lewis structure of a phosphate ion?
  • How many valence electrons does bromine have? (Br)?
  • How many years of School to be a Organic Chemist?
  • How mercury got its name?
  • How much .0025M Potassium bromide could be made by diluting 13ml of .010M solution?
  • How Much 0.54 M Nacl, "Physiologic Saline," can be prepared via the dilution of 100 mL of a 6.o M NaCl solutio
  • How much 1.041 N Sodium Hydroxide do I add to 1L H2O to make 0.02 N NaOH??
  • How much 1.5M NaOH is necessary to exactly neutralize 20.0mL of 2.5M H3PO4?
  • How much ammonium do i use for the tollen's test?
  • How much baking will neutralize vineger?
  • How much bleach can you put in a childrens pool to disinfect it?
  • How much Btu's require to evaporate 300-kg of water frm 600-kg solution (170-kg Sodium Nitrate + 430-kg Water)
  • How much carbon monoxide is fatal?
  • How much does 800 mls of liquid weigh?
  • How much does a bushel of gold weigh?
  • How much does LSD cost? (for school project)?
  • How much does Silver Cost?
  • How much electricity does the avg house use per day in KW/h?
  • How much energy does it take to convert 0.500kg ice @ -20C to steam @ 250.C?spec heat cap & enthalpies r below
  • How much energy does it take to convert 500 g of ice at -20 oC to steam at 250oC?
  • How much energy is needed to power a hydrogen car for one mile?
  • How much energy is needed to vaporize 100. g of water at 100. oC to steam at 100. oC?
  • How much energy is required to change 86.0 gram of water at 100 deg C to 86 g of steam at 100 deg C?
  • How much energy must be added to a 2-kg piece of aluminum with a specific heat of 900 J/(kgoC) to increase its
  • How much energy was produced in this reaction? The speed of light 3*10 to the 8th power m\s?
  • How much faster might an enzyme make a chemical reaction go?
  • How much heat is needed to de-compose Ammonia into N and H molecules?
  • How much heat is released when 1.5 grams of sodium and 3.5 grams of chlorine react?
  • How much heat is required to vaporize 128 g benzene at its boiling point?
  • How much heat must be added to turn 3 grams of water into a vapor and what will be the final temperature?
  • How much hydrogen gas must react w/ 1200 kg of coal (pure carbon) to make CH4 (methane)?
  • How much is 20lb converted in KG?
  • How much is 3 1/2 kg of sugar?
  • How much of a hazard is spauldite? This stuff kicks up a lot of dust when machined. How bad is this stuff?
  • How much of each starting material would you use to prepare 2.00 L of each of the following solutions?
  • How much of ethylene is produced each year?
  • How much oil would a gum boil boil if a gum boil boiled oil ?
  • How much oxygen will be formed?
  • How much raw materials of aspirin do you need for a 300mg (1 tablet) of aspirin?
  • How much sodium bromide?
  • How much sulfuric acid is produced in Australia per year?
  • How much water accompanies sodium?
  • How much water is needed to fill a tank?
  • How nutritious are your canned and fresh juices ?
  • How often should a calibration be done in a clinical centrifuge, water bath and clinical sterilizer?
  • How often should a calibration be done in the following instruments: clinical centrifuge and water bath.?
  • How ot make a leaf into a glue?
  • How ould i give someone an atomic wedgie with old navy briefs or hanes briefs?
  • How Oxycyte was made in a lab ?can it be made in an ordinary lab only by giving fluorine with carbon ?
  • How plastic is made in industries?
  • How potassoim hydroxide is identified in the laboratory?
  • How protein in an electrophoretic system, should the pH become lower than the isoelectic point of the protein?
  • How quickly does chlorine evaporate from tap water?
  • How suger dissolve in water?
  • How the car shampoo is made, what are its main ingredients, who are the suppliers of chemicals for gulf ?
  • How the concentration of carbondioxide is calculated in a solution?
  • How the elements are arranged in the modern periodic table?
  • How the release of SO虏 into the air can form acid rain and how acid raihn affects H虏o sources...?
  • How to make chemical n ionic equations?
  • How to add compounds?
  • How to add pizzazz on a demonstration project?
  • How to analyse free sulphuric acid content in PTSA?
  • How to avoid rusting of metal parts ?
  • How to balance : SnCl2 + Fe2(SO4)3 -> Sn(SO4)2 + FeCl2 ? and is it the right products?
  • How to balance an equation for chemistry... help please?
  • How to balance each chemical equation?
  • How to become a pyrotechnition in arizona?
  • How to blow up a water bottle with alka selters?
  • How to calculate electrostatic potential from Gaussian results? (like V min, V max and surface area?
  • How to calculate energy difference in Rydberg?
  • How to calculate heat changes during a reaction?
  • How to calculate the amount of HCl needed to acidify to ~pH 2?
  • How to calculate the Isoelectric point of a protein? can you give me an example with a specific protein?
  • How to calculate the molar enthalpy of vaporization?
  • How to calculate the molecular formula of a compound?
  • How to calculate the molecular mass?
  • How to calculate the percentage increase of carbonic acid given initial volume 2.5 ml and final volume 6.0 ml?
  • How to Calculating the ka value?
  • How to change concentration of a salt in a physics experiment using a short procedure?
  • How to cheack for Ca2+ Mg2+ Ba2+ and I- Br- Cl- cations and anions?
  • How to check the properties of activated carbon?
  • How to complete nuclear reactions and name the decay process that is occurring in each?
  • How to convert 4mg/ml(stock) to 100,50, 10 ng/ml?
  • How to convert 760.55$ in words?
  • How to convert Fahrenheit to Celsius?
  • How to convert grams to moles?
  • How to convert methylbenzene to phenylmethanol?
  • How to convert the concentration of 21.879 micromolar protein to mg/ml, molecular weight is 15.5 kD?
  • How to convert the units: IU/ml to ng/ml?
  • How to decompose K2SO4 into:?
  • How to determine minimum amount of organic solvent required?
  • How to determine nickel content in chocolates?
  • How to determine nickel content in chocolates?
  • How to differentiate between natural materials & manufacture materials. Show the examples.?


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