Chemistry Questions and Answers

  • 2.28 g of Octane is completely burned in 7.00 g of Oxygen...CHEMISTRY HELP!?
  • 2.28 g of Octane is completely burned in 7.00 g of Oxygen...HELP!?
  • 2.There could be false positive Benzidine Test. What other substances can give positive test?
  • 2.Why is egg white used as an antidote for lead or mercury poisoning?
  • 20 mL of NaOH needed to titrate 30 mL if 6 M HCl, what is the molarity of NaOH?
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  • 2006 AP chemistry question?
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  • 25 cm3 of sulphuric acid was neutralised with 18.0 cm3 of sodium hydroxide 1.0 mol dm-3.?
  • 25 g of chromium is heated to 75 C with 47 g of beryllium at 25 C. What is the final temp of the two metals?
  • 26,000 feet of steel and copper wire?
  • 27.5 ml of NaOH to titrate 100ml of HCL and 18.4 ML of NaOH to titrate 50ml of .0282 M H2SO4 find unknown conc
  • 27g of H2O, how many hydrogen atoms?
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  • 2-Butene and 1-Butene?
  • 2MnO4+5 H2O2+6H can I get the explanation about the equation and order reaction?
  • 2NaH2PO4 + Ca(NO3)2 --> Ca(H2PO4)2 + 2NaNO3 Lab question?
  • 2Questions :o)?
  • 3 chemical bonding questions?
  • 3 chemical properties of wood?
  • 3 chemistry questions...writing equations?
  • 3 Elements Questions?
  • 3.5 moles of NaOH is equivalent to __________ grams of NaOH.?
  • 3.67 g of hydrazoic acid ( HN3 ) is added to water to make a final solution of 432 ml.?
  • 3.Differentiate human blood from animal blood as to their characteristics.?
  • 32 degrees celsius is equal how many degrees fahrenheit?
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  • 3-d molecular structure of water?
  • 3-methyl-1-pentanol + acetic acid reacts with what chemical?
  • 4.Use the Formulae above to calculate the following equations?
  • 4.Use the Formulae above to calculate the following equations?
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  • 486J of energy into 25mL of ethanol, how hot does it get if it were origin at 10.0 deg C?
  • 5 ml of 0.002M Fe(NO3)3, 3ml of 0.02M KSCN and 2ml of distilled water were mixed?
  • 5 pounds equals _ ounces?
  • 5. Indicate the product formed on nitration of each of the following compounds: bezene, toluene, chlorobezene,
  • 5.70 g of nitrous acid ( HNO2 ) is added to water to make a final solution?
  • 5.Which of the following physical properties can be attributed to the effects of hydrogen bonding?
  • 50 mL of .125 M HCl is added to 25.00 mL of .102 M Ba(OH)2. What is the pH of the resulting solution?
  • 50 ml of water were mixed with 50 ml of water at 25.1 C in a calorimeter also at 25.1 C.?
  • 501 grams aluminum sulfate; 449 grams calcium hydroxide; total is 596 grams calcium sulfate?
  • 54.4 kelvin to ? degrees farenheit?
  • 56 mg of cobalt-55 into 14 mg?
  • 5g of tin reacted with excess iodine according to the euation Sn + 2 I(2) = SnI(4)?
  • 6.0 mol of Al, how many moles of oxygen are nedded for a complete reaction?
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  • 7.6 mL of sulfuric acid took 33.1 mL of 1.0 M sodium hydroxide to neutralize, concentration of sulfuric acid?
  • 7.What kind of ions and compounds are dissolved in bottled water versus tap water?
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  • 8.1mL of concentraed sulfuric acid (17.6)M) is diluted to 500mL. What is the concentration of the solution?
  • 8200 kJ, how many Calories is this equivalent to?
  • 86.2 grams C2H4 to moles (explain steps please)?
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  • a cubic unit cell contains a cation at(0 0 0)and anions at (1/2 1/2 0),(1/2 0 1/2),and (0 1/2 1/2).sketch?
  • A 0.0100 M solution of a weak monoprotic acid is found to be 3.5%. what is the pH of solution and Ka of acid.?
  • A 0.10-mol sample of a diprotic acid, H2A, is dissolved in 250 mL of water. The Ka1 of this acid is 1.0 x 10-?
  • a 0.5231g sample of impure KBr is treated with excess AgNO3 and 0.8145g AgBr are precipited.?
  • A 1.300 g sample of benzoic acid (C7H6O2) was burned in a bomb calorimeter.?
  • A 110.0 mL sample of nitrogen at 820 torr was compressed to 92.0 mL, then what's the pressure, in torr, now?
  • A 2.24 M CuSO4 solution has a volume of 3.49 L. It is diluted to a volume of 7.018 L. What is the molar concen
  • A 3.25 mass% solution of isopropanol (C3H7OH) in water to molarity(density of the solution is 1.04 g/mL).?
  • A 31.5 ml aliquot of H2SO4 was titrated with 0.0134 M NaOH. It took 23.9 ml of base--conctrn of the acid?
  • A 5.50L container has a pressure of 45 torr at -15 degree C. How many molecules are present?
  • A 50.0-mL sample of 0.100 M Ca(NO3)2 is mixed with 50.00 mL of 0.200 M NaF. When the system has come to equil?
  • A 60.0 g sample of an alloy was heated to 96.00 degrees C and then dropped into a beaker?
  • A 9% solution of glucose would be what molar concentration?______M?
  • A 90.00ml solution of NaCl and ethyl alcohol has 7.83 g of salt dissolved in the alcohol.?
  • A backpacker wants to carry enough fuel to heat 2.5 kg of water from 25 degree C to 100 degree C.?
  • a bag of cement is open it gets wet.Next day the sun shines brightly can this be a reversible change?
  • a balanced chemical equation must obey the law of conservation of mass - true of false?
  • A balloon is filled to a volume of 52.0 mL at a temperature of 57.0oC.?
  • A balloon is filled to a volume of 57.0 mL at a temperature of 38.0oC..?
  • A balloon is filled to a volume of 57.0 mL at a temperature of 55.0 degrees C.?
  • A balloon is filled to a volume of 66.0 mL at a temperature of 45.0oC.?
  • A beaker with 200 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop...?
  • a bit confused?
  • a box that has a recipe for making a crystal garden ?
  • a buffer solution consists of what? how do you solve and equation given volume and molarity of substance?
  • a buffer solution was prepared by adding 200mL of 0.06M CH3N.H2 and 300mL of CH3NH2Cl of 0.03M solution.?
  • A carbon oxygen double bond in a certain molecule, such as acetone or other ketones, absorbs radiation that?
  • a catalyst lowers the activation energy of a reaction. true or false?
  • A cellophane bag, a membrane permeable to water, contains 2 M sugar solution...?
  • a certain hydrate of copper(II) sulfate is composed of 36.0% water and 64.0% CuSO4. Determine and write the?
  • A certain indicator HIn has a pKa of 9.00 and a color change becomes visible when 7.00% of it is In-.?
  • A challange question on chemistry.?
  • a change of state is a physical change = t/f?
  • a characteristic of a chain reaction is that the material that begins the reaction is also one of the products
  • A characteristic of a chain reaction is that the material that begins the reaction is also one of the products
  • A chemical equilibrium occurs when the?
  • a chemical reaction in which bonds are broken are associated with?
  • A chemical symbol for sodium is...?
  • A chemist has 300 mililiters (mL) of solution that is 18% acid. How many mililiters of acid are in the solutio
  • A chemist has 400 milliliters (mL) of solution that is 21% acid. How many milliliters of acid are in the solut
  • a chemist mixes 12L ofa solution that is 45% acid with 8L of a solution that is 70% acid what is the percent?
  • a chemist weighs a steel cylinder of compressed oxygen O2 and finds dat it has a mass of 1027.8g...?
  • A chemistry question about chemical reactions?
  • A clear, homogenous liquid is heated until bubbling starts. The original liquid can be described as:?
  • A colour test to differentiate between lipids,proteins and carbohydrats.?
  • A Combustion of unokwn compound that contains only N, C, H and O?
  • a compound containing 3 atoms of carbon and 8 atoms of hydrogen is combinded in a reaction with oxygen molecul
  • a compound containing 3 atoms of carbon and 8 atoms of hydrogen is combined in areaction /woxygen molecules.?
  • A compound contains only C, H, and N. Combustion of 31.5 mg of the compound produces 30.2 mg CO2 and 37.0 mg H
  • A compound is analyzed and found to contain 15.1% nitrogen, 34.5% oxygen, and the remainder cerium. Empirical?
  • A compound X undergoes two simultaneous first-order reactions as follows: X Y with rate constant k1 and X Z?
  • A Conceptual Chemistry Question...that I can't figure out...:(?
  • a confusing balancing a chemical equation problem.?
  • a container of gas collected by was displacement at 21.5 C...and 102.7 kPa has a volume of 493.5 ml?
  • A conversion reaction of the type above takes place at 755 K and an initial concentration of cyclobutane o
  • A couple of chemistry questions. Can someone please help me?
  • A couple of tricky Energy/Bonding/Kinetics Questions..?
  • A cylinder of He has volume of 8.00L. Pressure of gas is 388lb in -2 @ 25C.?
  • a cylindrical container holds 75cm^3 of mercury. If you were asked to determine the mass of the mercury, which
  • a decrease in the reactant concentration per until time in a reaction is a measure of the?
  • A displacement reaction?
  • A dry beaker has a mass of 55 g. When 50 ml of distilled water is added to the beaker (read it below)?
  • a few chemistry problems (just double checking my answers)?
  • a few multiple choice questions...easy...please help...?
  • A few multiple choice questions...easy...please help?
  • a fish tank holds 36 gallons how many pounds of water are in the tank?
  • A Food additive AND its purpose?
  • a Furnace that provides heat by burning methane gas (CH4) must have the correct mixture of air and fule?
  • a gas has a volume of 300 ml when under a pressure of 740mmHg. The temp remains constant.?
  • A gas in a cylinder is expanded by heating the cylinder?
  • A gas is more likely to change to the liquid phate when the pressure on the gas?
  • A gas volume that contains an equal number of hydrogen and oxygen molecules has a pressure of 0.6 atmosphere..
  • A gas whose molar mass..?
  • A gaseous mixture consists ...?
  • A good fuel for making carbon dioxide gas in a bottle?
  • A Grignard Chain of Unknowns?
  • A hot water bottle contains 750g of water at 65 C. If the water cools to body temperature (37 C)...?
  • A hot-air balloon rises. Which of the following is the best explanation for this observation?
  • A layman's chemistry question?
  • a little chemistry help.?
  • a metal combines with another metal to form a ______?
  • A mixture contains the following: - 320g methane, 90g ethane, 44g propane, & 58g butane:?
  • A mixture of H gas & water vapor has total pressure of 738 mm Hg.?
  • A molecule has 20 carbons, 4 oxygens, 1 nitrogen, and approximately 15 hydrogens. What is it?
  • A molecule with a single covalent bond is ____?
  • A mountain bike shop assembles bicyles from parts. It takes two rims with tires and 3 reflectors per frame.If?
  • A net force of 20 acting on a wooden block produces an acceleration of 4.0 m/s2 for the block.?
  • a nuclear reactor produces energy from uncontrolled fission - true or false?
  • A physical change is reversible, a chemical change is not.?
  • A physical chemistry question?
  • A piece of aluminum metal is added to an aqueous solution of silver nitrate yielding silver metal & aluminum ?
  • a plane is heading due south at a velocity of 86 km/hr, and a strong crosswing is blowing east at 25 km/hr.?
  • A possible fuel for fusion reactors is?
  • A pressurized can of whipping cream has an internal pressure of 1.05 atm at 25.0 oC. If it is placed in a free
  • A pycnometer flask has a mass, when stoppered of 45,315g. Its volume has been found to be 20.0mL.?
  • A question about collision?
  • A question about oxidation?
  • A question bout 4 elements?
  • A question on acrylonitrile and partial pressures?
  • A question on Gas Laws?
  • A reaction A + B ---> C obeys following rate law: Rate=k[A]^2[B]?
  • A sample of 0.0020 mole of HCl is dissolved in water to make a 2000-mL solution.?
  • A sample of a gas is compressed to half its original volume while its temperature is held constant.?
  • A sample of gas is found to exert a pressure of 322 torr when it is in a 2.00 L flask at 100.00 oC. Compute:?
  • A sample of gaseous PCl5 was introduced into an evacuated flask?
  • A sample of gaseous SO3?
  • A sample of NH3 occupies 75.0 litres at STP How many molecules is this?
  • a sample of the compound gold bromide and yellow crystalline solid was heated& made a shiny metal and red gas.
  • A saturated solution contains?
  • A secondary one chemistry question from one of Singapore's best schools!?
  • A similar word or synonym for PURE SUBSTANCE?
  • A Simple Chemistry Question..?
  • a solid labeled with its volume in cm3 (cubed)and m3 (Cubed)?
  • a solid magnesium ribbon is burned in air to give the solid metal oxide?
  • A solution containing equal numbers of hydrogen ions and hydroxide ions is?
  • A solution containing equal numbers of hydrogen ions and hydroxide ions is?
  • a solution contains .500 M HA (ka=1.0x10^-8) and .250 M NaA.?
  • a solution contains both Ag + and Pb 2+ ions, the concentration of Ag + ions is 1.5 X 10^-2 M and Pb 2+?
  • A solution formed by mixing 3.19g of xylene w/ 35.0g of benzene. The boiling point of pure benzene is 78.0 C?
  • A solution has a PH of 2.5, find the pOH, the [H+],the OH-. Please explain in detail. Thank you?
  • a solution of pH 2 has a higher concentration of H+ ions than pH7?
  • A solution of sodium sulfide is expected to be?
  • A solution of table salt, NaCl, in water is?
  • A Stoichiometry Question?
  • A strange math story problem! Think you're up for the challenge? It's about partial pressures and physics!
  • A student has a glass coffee table in their dorm room that they want to stack some of their books on. However?
  • A student mixes two white solids in a beaker, which is sitting in a small pool of water on a block of wood.?
  • A substance containing atoms of different elements that are bonded together is called a(n)?
  • A substance with a large specific heat: 1. heats up quickly 2. heats up slowly?


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