Chemistry Questions and Answers

  • Chemistry Problem ?
  • % Calcium in Milk by EDTA titration?
  • >>> Chemistry Problem <<<?
  • "i want need some product based formulas but free of cost"?
  • "Ionic detoxification" : Fact or Fiction?
  • "Sphereification" Algenic Acid, agar agar, and Fruit Juice?
  • "Why are ion-dipole forces stronger than hydrogen bonding?"?
  • ((((Pressure lamp))))?
  • (5)At what pressure would 100mL of gas be found if it began at 500mL at 2.5 atm?
  • (6) what is the volume of a gas at 275 mm Hg if it occupied 750 mL at 1000mm Hg?
  • (Multiple Choice) wat is the Net Ionic Equation for the reaction that occurs when small amounts of .?
  • (multiple choice)Calculate the pH of the solution resulting from the addition of 10.0 mL of 0.10 M NaOH.?
  • *help*..?
  • *Mass numbers, and neutron numbers for Na, Al, Fe.?
  • 0.7026g sample of unknown acid requires 40.96mL of 0.1158M NaOH for neutralization to a phenolphlein end point
  • 0.959g of the acid HA is neutralized by the addition of 30.95 mL of 0.176 NaOH. Determine the molar mass of?
  • 1.00 g of a compound of copper & chlorine contained 0.524 g chlorine.i need 2 calculate the empirical formula?
  • 1.If 1.75g of salicylic acid is dissolved in 100mL of water at 100oC, how many grams of crystals can crystalli
  • 10 points!!!!?
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  • 12 class chemistry project?
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  • 15 ml of 0.0456 g/L Cu2+ was mixed with 65 ml of water. What is the molarity of Cu2+?
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  • 1-butanol reaction mechanism?
  • 1mL of a 200 mg/mL sedative to 150 lb pt. Whats the equivalent dose in mg/kg?
  • 2 Chem problems please help if you can?
  • 2 Chemistry Questions Regarding Molar Mass and Emprical Formula...Please Help?
  • 2 chemistry questions?
  • 2 dropsof each Fe(NO3)3*0H20 and NaI I need balanced chemical equation and net ionic equation, brake it down
  • 2 H2 (g) + S2 (g) >>> 2 h2 S(g)?
  • 2 liquids combust on contact?
  • 2)What is meant by economic and non-economic deposits of natural resources?
  • 2/3: challenge! for chem wiz only!?
  • 21.6 gram Metal Ball converting it to Volume (ml)? HELP?
  • 210 isotope of the element with atomic #82 undergoes emission of an alpha particle What's the following for it
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  • 25 ml of 0.5 N NaOH is required to neutralize 30 ml of an unknown acid solution. what is the normality of it?
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  • 2-butanol reaction mechanism?
  • 2K+2Hsub(2)O -> 2KOH + Hsub(2)?
  • 2kinda bacteria,aerobic n anaerobic,in water,which is>effective in reducing organic carbon load in sewers?
  • 2mno4(-)+10fe(2+)+16H(+)=>2mn(2+) +5fe(3+)+8h20?
  • 2nd Year Chem, another pH problem! Ari!?
  • 2nd Year Chem, pH problem Part 2!?
  • 2nd Year Chemistry Problem?
  • 2nd Year College Chem, Buffers & pH!?
  • 2NH3(g) + Cl2(g)---> N2H4(g) + 2HCl(g)?
  • 2NOBr <--> 2NO + Br2?
  • 2x6+39.2-14x52.01=?
  • 3 MnO4{-} + 24 H{+} + 5 Fe = 3 Mn{2+} + 5 Fe{3+} + 12 H2O?
  • 3 part question help!!!!?
  • 3.20 cm3 air bubble forms in a deep lake at a depth where the temperature is 8°C at a total pressure...?
  • 3/3 Challenge!!!1 for chem. wiz only!?
  • 32 Oz HOW MUCH IS IN ML?
  • 325 ml of Helium gas is heated from 25.0 C to 32.3o C. what is the new volume of He?
  • 325 ml of Helium gas is heated from 25.0 C to 32.3o C. what is the new volume of He?
  • 32P has a half life of 14.26 days. How many grams remain after 42.78 days?
  • 355 KWh corresponds to how many litres of Hydrogen & Oxygen when Electrolysis iof Water is carried out.?
  • 41.56 grams of calcium hydroxide heptahydrate contains how many moles of associated water molecules, molecules
  • 4Na(s) + O2(g) ----> 2Na2(little2)O(s): help with mass calculation in reaction?
  • 5 questions: 1. How many moles of neon occupy a volume of 14.3 L at STP?
  • 5.12 * 2.0 = . Use correct amount of significant figures?
  • 50 g of sugar (C12H22O11)is dissolved in 500g water at standard pressure. How much is the boiling point raised
  • 50 g of sugar (C12H22O11)is dissolved in500g water at standard pressure.How much is the freezing point lowered
  • 50.0 grams of KClO3 solid is heated and the following reaction occurs:?
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  • 650. J is the same amount of energy as?
  • 69.7 grams of a solute with a molecular mass of 2790 are dissolved in enough water to make 1.00dm^3 of solutio
  • 7) a gas ocupies 60 L at 250'K and 1 atm. What is the volume at 250'C and 1.5 atm?
  • 7.What is the solubility of Pb(IO3)2 (a) in mol/L, and (b) in g/L ? Ksp of Pb(IO3)2 = 2.5 x 10^-13?
  • 750ml of a gas 1t 127'C and 800mm Hg would occupy what volume at STP? (10)?
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  • 8 liters = how many gallons?
  • 9. Why is it that a substance such as CH3NH2 containing no OH- increases the pH when dissolved in wate?
  • 9.What mass of BaSO4 will dissolve in 450 mL of aqueous solution. Ksp for BaSO4 is 1 x 10-10.?
  • A ______ TAIL always points away from the sun because solar wind pushes dust and gases from the head of it.?
  • A 1.0L volume of gas at 27.0C exerts a pressure of 85.5kpa what will the pressure be at 127C?
  • A 1.58g gaseous sample of C2H3X3 with a volume of 355 mL and 769 mm of mercury at 95 degrees C. What's x?
  • A 10.0mL sample of NaCl solution has a mass of 10.416g. When the solution is evaporated to dryness,the solid?
  • A 15.00 mL sample of NaOH was titrated to the stoichiometric point with 17.40 mL of 0.2340 M HCl.?
  • A 4.50 mol sample of gas occupies a volume of 34.6 L at a 298K. What is the pressure of the gas?
  • A 475 mL sample of gas is collected over water at 27°C and a total pressure of 675 mm Hg. If...?
  • A 5.00-L tank contains helium gas at 1.50 atm. What is the pressure of the gas in mm Hg?
  • A 6.681-g sample containing magnesium and sodium chlorides was dissolved in sufficient water to give 500.0 mL?
  • A 7.83 gram sample of NaCl is dissolved in 90.00 ml of ethyl alcohol solution. Calculate...?
  • A balloon filled with helium is released into the sky,as the balloon rises,it expands until finally it pops Y?
  • A biological reaction has a change of enthalpy of -125 kJ/mol and a change of entropy of -126 J/K mol.?
  • A birthday balloon is blown up with dry air to a volume of 8.4 cm3. What volume is oxygen?
  • A buffer solution is composed of1.4g KH2PO4 (136.09g/mol) and 5.7g Na2HPO4 (141.98g/mol)?
  • A catalyst speeds up a chemical reaction as a result of which of the following?
  • A certain balloon will burst at a volume of 2 liters. If it is partially filled at a temperature of 293 K...?
  • A certain organic compound in the vapor state has a density of 3.27 g/L at 95°C and 758 torr...?
  • A chemical bond formed when 2 atoms share 2 pairs of electrons is a ___ bond and described as a ____?
  • A chemical bond formed when 2 atoms share 3 pairs of electrons is a ___ bond and described as a ____?
  • A chemical medical question?
  • A chemist dissolves 9.07g of NaOH in enough water to make 236. mL of solution.?
  • A chemist mixes HClO with water. The concentration is originally 0.24 M HClO, but after reacting...?
  • A chemistry problem, empirical formula?
  • A compound has a pKa of 7.4. You have 100 ml of a 1.0 M solution of this compound at pH 8. You add 30 ml of a?
  • A compound is found to be 62.1% C, 5.21% H, 12.1% N, and 20.7% O. When...?
  • A constant electric current deposits 0.365 g of silver metal in 12960 seconds from solution of silver nitrate?
  • A coordination compound is found by analysis to contain 21.79%Co 18.09%NH3 and 39.32Cl remainder is h2o empiri
  • A cpd of element A and oxygen has a mole ratio of A:O = 2:3. If 8 grams of the oxide contains 2.4 g of oxygen,
  • A cubical block of ice floating in water has to support a metal piece weighing 0.5kg what can be the minimum?
  • A cycloalkane.?
  • A day on Jupiter is 3.543 x 10^4 (4th power) seconds long & a year is 3.743 x 10^8 (8th power) seconds long.?
  • A diamond is a liquid with a high viscosity so how hard could a diamond possibly be ?
  • A diver is able to cut through water in a wimming pool . which property of matter does this observation show?
  • A few "element"ary questions.?
  • A functional group is a certain group of atoms that ...?
  • A gas occupies 2.7 liters and weighs 1.72 grams at STP. What is the molecular weight?
  • A gas occupies 2.7liters and weighs 1.72 at STP. What is the molecular weight?
  • A gas occupies 30L at 760mm Hg. What is its volume at 350mm Hg?
  • A gas of unknown molecular weight is found to diffuse at a rate of 0.19cm/s compared to 0.59 cm/s for helium?
  • A homogeneous mixture that does not settle out on standing is:?
  • A hydrocarbon contains only what elements?
  • A mixture containing starch, NaCl, Glucose, and Albumin is placed in a dialyzing bag and immersed in distilled
  • A mixture of .47 moles of H2 and 3.59 moles of HCl is heated to 2800'C. Calculate the equilibrium partial?
  • A mixture of magnesium chloride and magnesium sulphate is known to contain 0.6 moles of chloride ions and 0.2?
  • A mole question?
  • A molecule with the formula AX3E uses what to form its bonds?
  • A Mummy's Tomb.....?
  • A particular beaker contains 2.38x10-3 M NaOH. The hydrogen ion concentration , [H+], in this beaker is?
  • A particular chemical reaction carried out at 20oC takes 2 hours. How long will it take to carry out the react
  • A particular chemical reaction carried out at 20oC takes 2 hours. How long...?
  • A particular chemical reaction carried out at 40oC takes 2 hours. How long will it take to carry out the...?
  • A person traveling west gains an hour when he croses a time zone. (look inside) SCIENCE?
  • A pharmacist is mixing a 3%saline sol.& an 8%saline sol.to get 2 litres of a 6% sal.sol. how much of each sol.
  • A pharmacist wants to mix a solution that is 4% Minoxidil.?
  • A piece of wood that has changed to stone is refered to as...A. cast B. molded or C. petrified? THANKS!?
  • A potato contains 20 g of carbohydrate. Carbohydrate has a caloric value 4 kcal/g, how many kcal are obtained
  • A query 'bout Chemistry...regarding Temperature.?
  • A question about percent efficiency?
  • A question about CO3?
  • A question on chemical equlibrium...?
  • A question on gaseous state?
  • A reaction that releases energy as it occurs is classified as a(n) _____.?
  • A regular soda placed in a bucket of water will sink. a diet soda placed in the bucket of water float. explain
  • A samle of a volatile liquid is vaporized completely in a 24 cm cubed flask at 135 degrees celcuis and 1200 mm
  • A sample of a hydrate of NiCl2 (.235g) is heated to drive off water leaving .128g. What is X in NiCl2(XH2O)?
  • A sample of a volatile liquid is vaporized completely in a 240 cm3 flask at 135°C and 1200 mm Hg...?
  • A sample of a volatile liquid is vaporized completely in a 240 cm3 flask at 135°C and 1200 mm Hg...?
  • A sample of gas at 38.0 degrees C occupies a volume of 2.97 L and exerts a pressure of 3.14 atm. The ga...
  • A sample of gas has an initial volume of 2.45L at a pressure of 855 mm Hg and the temperature of 39 degrees C?
  • A sample of gas in a 10.0 - L container exerts a pressure of 1.2 atm. Calculate the pressure exerted by the ga
  • A sample of gas occupies 1.55L at 27.0C and 1.00atm pressure whats the volume if the pressure rise to 50.0atm?
  • A sample of nitrogen gas occupies 1.55L at 27C and 1.00atm pressure What will the volume be at -100C?
  • A sample of salicylic acid?
  • A sample of solution has a total volume of 635.47ml and contains 0.05791 moles of solute. Calculate molarity?
  • A small chemistry problem im not sure?
  • A solute which has i=5, is placed in 5430g of nitrobenzene. if the freezing point is lowered to 3.29 degrees..
  • A solute, which has i = 5, is placed in 5430 g of nitrobenzene. If the freezing point is lowered to 3.29°C...
  • A solute, which has i = 5, is placed in 5430 g of nitrobenzene. If the freezing point is lowered to 3.29°C...
  • A solution has a pOH of 5.4. What is its pH?
  • A solution is prepared by dissolving 104.1 grams of barium chloride, BaCl2 in 4000 grams of water...?
  • A solution with a pH =10 7 is:?
  • A solution with the same osmotic pressure as the blood is....?
  • A stong acid ionizes?
  • A strong acid ionizes...?
  • A student is given 2 pure samples, A and B. what is a simple procedure to determine if they are both the ..?
  • A student prepared a 0.10 M solution of acetic acid, CH_3COOH. Acetic acid has a K_a of 1.75 x 10^-3.?
  • A student required 23.74 mL of NaOh solution to titrate 0.5858 g of HSO3NH2?
  • A student used an aluminum sample of 1.50grams.what is the minimum volume of a 3.00M KOH solutionn that would?
  • A student weighed out a sample of acid powder and found the mass to be 1.17 g. When the solution turned pink..
  • A sugar cube is no longer visible after it has been left in a glass of water for a few hours?
  • A tank contains helium gas at 490 mmHg, N gas at 0.75atm, and Ne at 520 torr.?
  • A tank holds 2.36 l of gas at 784 torr and 24.2 C. How much will it occupy at STP(standard temp. and pressure?
  • A tarnished copper vessel begins to shine when rubbed with lemon .Why?
  • A titration was performed on 50.0 ml of 0.250 M NaOH. After the addition of 71.4 ml of HCl, the phenolphthalei
  • A typical sample of brass is 67% copper and 33% zinc. How many moles of zinc are disolved in 67 grms of copper
  • A UNIT used to indicate atmospheric pressure is a? KILOMETER, LITER OR A MILLIBAR? help! thanks?
  • A vinegar sample contained 4.60% acetic acid. How many mL of 0.450/V sodium hydroxide would be required?
  • A water sample has .00505 grams of Arsenic in 12 Liters. what's the arsenic concetration in parts per million?
  • Abestos was scattered all over my building during NYC explosion. How long does asbestos stay in the area/air?
  • About displacement of a metal solution?
  • About galvanometer?PLs help...?
  • About mercury thermometer?
  • Absorbance data for phenycyanide by spectrophotometer?
  • Absorbance data for phenylcyanide?
  • Absorptivity?
  • According to Le Chatelier's principle, which direction will the equlibrium shift if the concentration of ..
  • According to Le Chatelier’s principle, which direction will the equilibrium shift if the concentration...?
  • According to the IUPAC convention for chemical naming, which part of a hydrocarbon is the main chain?
  • According to the IUPAC convention, alkyl group names should be located _____ of the name of the main chain.?
  • Acetic acid is the active ingredient in vinegar. In a solution of acetic acid the following equilibrium?
  • Acetic Acid Problem?


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