Chemistry Questions and Answers

  • 5 g of bicarbonate ion if added 1 L of H2O. What is the [OH-] & pH of the solution?
  • 5,400 moles of P4O10 has a mass of?
  • 5.00 grams of KOH is dissolved in solution with a volume of 3.00L what is the pH of the solution?
  • 5.What is the percent by mass of a solution 2.67 Molar of CaSO4, if the density of the solution is 1.95 g/ml?
  • 5.When the element in figure 1 L/2 react they will form positive or negative ions?
  • 5/6 converted into a percent is what?
  • 50.0 g of sulfur are mixed with 100.0 g of iron and the mixture is heated. When the reaction is completed, 12
  • 500mL sample of 2.00M HCl solution is treated with 4.47g of magnesium.?
  • 58) when an acid reacts with a metal, what is one of the usual products? CO2 or H2O or NaCl or hydrogen gas?
  • 5fl oz=how many ml?
  • 6.02 * 10^23 molecules of dihydrogen monoxide in a bottle?
  • 6.What is the molarity (M) of a solution 2.5 molal of H2SO4, if the solution has a density of 1.77 g/ml?
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  • 69.7 grams of a solute with a molecular mass of 2790 grams are disolved in enough water to make 1.00 dm3 of so
  • 7.Determine the number of grams of solute needed to make the following solution: a 4,5 m solution of H2SO4 in
  • 7.Determine the number of grams of solute needed to make the following solution: a 4,5 m solution of H2SO4 in?
  • 75 ml of 0.15 M HCl is mixed w/ 50 ml of 0.20 M NaOH. wut is the PH of the resulting solution-show details plz
  • 75%of 200 is what number.?
  • 8 Chemistry Calculations. fastest to answer all gets best pnts!!?
  • 9.If 2.0 mL of a standard iron solution (1mL=0.050 mg Fe) is diluted to 50 mL, what is the final iron concent
  • 9th grade chem help?
  • A 0.10M NaCl solution is _____________(iso/hypo/hypertonic) to a 0.10M glucose solution?
  • A 0.20M solution of soidum nitrite, NaNO2, has a pH of 8.57 -write a chem equ. showing y this salt has the?
  • A 0.675 solution of lactose (c12h22011) in water has a density of 1.04 g/mL.?
  • A 0.85 M solution of a weak base has a pH of 11.4 what is the Kb of the base.?
  • A 1.0 L volume of gas at 27oC exerts a pressure of 85.5 kPa. What will the pressure be at 127oC? Assume consta
  • A 1.00L sampe of a gas has a mass of 1.92g at STP. What is the molar mass of the gas?
  • A 19.89 mL sample of NaOH solution is titrated to an endpoint by 15.07 mL 0.4137 M HBr solution. What is the m
  • A 20 L vessel contains a gas under a pressure of 5 atm at 303 K. how many moles of gas are in the vessel?
  • A 22.4 g sample of iron is allowed to react with 76.3 g of sulfuric acid.?
  • A 25.3g sample of KOH in 150.5mL of solution is reacted with 0.75M H2SO4...?
  • A 250 g sample of water at the boiling point had 45.0 kJ of heat added, how many g of water were vaporized?
  • A 250 gram sample of water at boiling point had 45.0 kj of heat added, how many grams of water were vaporized?
  • A 2L lab sample is at 72degrees celcius a pressure of 4atm.?
  • A 3.15 g sample of a salt dissolves in 9.10 g of water to give a saturated solution at 25掳C...?
  • A 325.0g piece of gold at 427 degree c is dropped into 200.0mL of water at 22.0degree c. Calculate the final?
  • A 4.60 L container had 66.50 moles of N2O4 added to it. When equilibrium was established, the concentration of
  • A 5.00-L tank contains helium gas at 1.50 atm. What is the pressure of the gas in mm Hg?
  • A 5.90L container had 62.00 moles of N2O4 added to it.?
  • A 700.0mL gas sample at STP is compressed to a volume of 200.0mL and the remp is increased to 30.0 degrees ce
  • A balloon initally occupies 18.4 L at 1.00 atm. What will be the volume at 0.800 atm?
  • A balloon is filled with He gas to a volume of 3.22 L at 32 掳C...?
  • A blacksmith heats an iron horseshoe with a of mass 1540 grams to a temperature of 1445 degrees C?
  • A bottle of beer was placed in a wine chiller of a fridge to cool.?
  • A buffer is made by dissolving CH3COOH AND CH3COONa in water?
  • A buffer ismade by dissolving CH3COOH AND CH3COONa in water?
  • A calculating energy problem?
  • A can of mixed nuts contains 60% peanuts. If the can holds 16 ounces, how many ounces of peanuts it contain?
  • A candle burns brightly in pure carbondioxide. is it true or false?
  • A carbonated can of pop and a mountain?
  • A certain compound contains two atoms of element x for every three atoms of sulphur (atomic mass 32.06).I f 10
  • A certain radioactive substance decays from 10,160 gm to 125 gm in 18 days. What is its half-life?
  • A certain radioactive substance decays from 10,160 gm to 125 gm in 18 days. What is its half-life?
  • A certain volume of gas was confined in a rigid container. If the pressure of hte gas sample in the container
  • A certain volume of gas was confined in a rigid container. if the pressure of the gas sample in the?
  • A chemical equation is balanced when?
  • A chemical industry?
  • A chemical plant uses electrical energy to decompose aqueous solutions of NaCl to give Cl2, H2 and Na...?
  • A chemical reaction in a bomb calorimeter ..?
  • A chemist has 200 milliliters of solution which is 15% acid.How many milliliters of acid are in the solution?
  • A chemistery question?
  • A chromium-plated steel bicycle handlebar is scratched. Will rusting of the iron in the steel be encouraged?
  • A compound contains 52.2% C, 13 % H and 34.8% of O. What's the empirical formula?
  • A compound is a pure substance made up of two or more elemts chemically bonded together. THe ______ of the...?
  • A compound is found to be 40.0% carbon, 6.7% hydrogen and 53.5% oxygen. Its molecular mass is 60 g/mole. Wha
  • A compoundX containing C ,H, N only has RMM 88. W hen heated with nitrous acid, 0.1g of X released 50.9ml of?
  • A conjugate acid differs from a conjugate base by a?
  • A container has 2 gases, He and Ar. 30% of it is He, what is the partial pressure of each if the total is 4atm
  • A container is filled with 10g H2 and 10 g O2. The mixture is ignited to produce water according to the ...?
  • A container of oxygen has a volume of 25.0 mL and a pressure of 3.00 atm.?
  • A crystal necklace with a blue liquid inside conatining 0.25 grams of silver (Ag) per 100 ml of solution. What
  • A drinks chemical question?
  • A few chamistry questions?
  • A few chemistry problems?
  • A few chemistry questions I need help with?
  • A few Chemistry Questions?
  • A few questions for school...?
  • A few questions on the synthesis of Aspirine.?
  • A formic acid bufer containing 0.50 M HCOOH & 0.50M HCOONa has a pH of 3.77.?
  • A freshman chemistry student decides to examine...?
  • A freshman chemistry student decides to examine...?
  • A friend asks if a radioactive substance with a half life of 1 day will be entirely gone at the end of 2 days.
  • A friend of mine asked me to explain the difference between molarity and molality, but i am not quite sure?
  • A galvanic cell that can be transported somewhat easily is know as an...?
  • A gas at 5.00 atm pressure was stored in a tank during the winter at 5.0掳C. During the summer, the temperature
  • A gas exherts a pressure of .150 atm when contained in a 2 liter container. A sample of nitrogen gas has a pr
  • A gas has a volume of 500.0 mL at 10.00 kPa. What would be it volume at 250.0 kPa?
  • A gas measures 400.0mL at 25.0 degrees C and pressure of 1067mbar. To what temp must the gas be cooled if ...?
  • A gas mixture contains 123 g SO2, 175 g N2, and 230 g CO2. What is the mole fraction of each comp in mixture?
  • A gas volume of 100 ml is collected at 40 degrees C and .466 atm of pressure. What will the dry gas occupy at
  • A girl need to measure 42 mL of liquid, what should she use in order to be most precise?
  • A given mass of air has a volume of 6.00 L at 101 kPa. What volume will it occupy at 25.0 kPa if the temperat
  • A hand craked can opener contains a wheel and axle, a wedge, and two levers.?
  • A have a question about foil bombs plz read inside?
  • A helium-filled balloon at sea level has a volume of 1.5 L at 0.983 atm and 37掳C.?
  • A heterogeneous mixture that is more stable, has smaller particles and does NOT separate is called a.?
  • A high volume sampler analysze 1200 m3 of air. If the volume is measured in STP, how many molecule there is?
  • A highly reactive element used in matches?
  • A HNO3 solution containing 62.0% HNO3 (by mass) has a density of 1.42 g/mL. How many moles of HNO3 are there?
  • A lead-acid battery charge can produce hydrogen; can this hydrogen be economical to produce and use as a fuel?
  • A lot of chem questions..in dire need of help; missed 1.5 months of school with mono...bleh..please help! I?
  • A metal can be perfected from corrosion by making it...?
  • A metal cylinder contains 1 mol of nitrogen gas a STP. what will happen to the pressure if another mol of gas?
  • A metallic ion is _____ its corresponding atom.?
  • A mixture of He and O2 is placed in a 4.00 L flask at 32 掳C. The partial pressure of?
  • A molecule with bonding that folows the octet rule?
  • A neutral solution of a salt in water contains...?
  • A nurse has 1 liter of a solution that is 22% alcohol.?
  • A one liter flask contains a gas that exherts a pressure of .470 atm. Another flask contains a gas that has?
  • A one liter sample of H2 gas exherts a pressure of .533 atm. A sample of oxygen gas is one liter and has a pr
  • A package of compounds used to achieve rehydration in sick patients contains 21.0 g of glucose, C6H12O6.?
  • A particular compund has molar mass of 181.44g/mole and an empirical formula of C2HCl. Determine the molecular
  • A particular salt is formed from the reaction of a weak acid with a strong base. What is the salt?
  • A permanent transfer of electron from one atom to another, thus forming cations anions occurs between _ and _.
  • A piece of blue litmus paper placed into water through which carbon dioxide gas is bubbled through will..?
  • A piece of unknown metal with mass 14.9 g is heated to 100.0 C and dropped into 75.0 mL of water at 20.0 C?
  • A polar bond is formed by?
  • A precipitate will form when...?
  • A question about Chemiluminescence?
  • A question about lactic acid fermentation?
  • A question about mass?
  • A question Extacy Ecstasy XTC?
  • A question i couldnt understand:) thank u?
  • A question on distilling water?
  • A radioactive isotope has a half life of 70 seconds.?
  • A radioactive isotope has an original mass of 300 grams. The amount drops to 75 grams after 1 minute.?
  • A Reaction of Magnesium Nitrate and Sodium Phosphate, what are the spectator ions and percipitate?
  • A real gas behances most nearly like an ideal gas at...?
  • A real gas will behave ideally under what conditions?
  • A really simple chemistry problem that's giving me a bit of a hangup?
  • A room is: 7 times 7 times 8 feet. What is the volume? or what is the method to find the volume?
  • A rubber balloon containing 1.0 L of a gas is carried from the top of a mountain to the bottom of the mountain
  • A salt may be prepared by the reaction of 1 salt w/ another salt, if 1 of the products is insoluble...?
  • A salt MX3 has a Ksp of 3.05x10^-15-What's the millimlolar concentration of X- in a saturated soln of the salt
  • A salt solution question. (I think it has to do with diffusion.)?
  • A sample of drinking water is severly contaminated with chloroform CHCl3 supposed to be carcinogenic in n?
  • A sample of 10cm3 of methamethiol was exploded with 60cm3 of oxygen. What would be the final volume of the...?
  • A sample of 12.2L H2O is found to contain 0.06151 g of C6H6. If H2O has a density of 1 g / ml...?
  • A sample of 12.2L H2O is found to contain 61.51 mg of C6H6. If H2O has a density of 1 g / ml...?
  • A sample of an unknown compound with a mass of 0.847 g has the following composition: 50.51 percent fluorine?
  • A sample of argon has a volume of 0.43 mL at 24 degrees C. At what temperature in degrees Celcius will it have
  • A sample of gas occupies 1.55 L at 27oC and 1.00 atm pressure. What will the volume be if the pressure is incr
  • A sample of grape juice has a pH of 4.85. What is the hydroxide ion concentration of this solution?
  • A sample of nitrogen gas in a 750mL vessel at 40c and 200 Torr..?
  • A sample of vinegar is titrated with a sodium hydroxide solution to find the mlarity of acetic acid.?
  • A sample of water contaminated with CHCl3 the level of conta.was15 ppm.1.express this in% 2.determine molality
  • A sample of wood is found to contain 1/4 as much Carbon as is present in da wood of living. wat is the age ?
  • A sapmple of gas in a steel container at -75 degrees celcius and 1.480 atm. what pressuer will the sample have
  • A science question/?
  • A science question?
  • A sealant for paved surfaces, from Germany, containing a form of methyl acolyte?
  • A series of biology questions that will blow ur brains out!?
  • A shampoo has a pH of 8.67. What is the [H3O+] in the shampoo?
  • A situation where two opposite processes are occurring at equal rates, and no net change is taking place?
  • A small cylinder of oxygen contains 300.0 mL of gas at 15 atm. What will the volume of this gas be when releas
  • A small piece of iron is placed into a dilute acididfied solution of potassium dichromate.?
  • A smart Q in CHEM?
  • A soln. is prepared by mixing 500mL of 0.10M NaOCL and 500mL of 0.20M HOCL. What is the pH of this solution?
  • A solution at 25Celcius has a hydrogen ion concentration of 2.6x10^-5 M.?
  • A solution containing 16.9 g of nonvolatile molar compound in 250 g of water has a freezing point of -0.744 C.
  • A solution contains 0.520 g of ethylamine, C2H5NH2, per 135.0 mL of solution. Electrical conductivity meas.
  • A solution has 45.0 mg Na2SO4/ml. What is the {Na+} in this solution?
  • A solution in which water is not the solvent?
  • A solution is 0.13 M Sr(OH)2. What are the concentrations of H3O+ and OH - in this solution?
  • A solution is made by dissolving 15.0g of sodium hydroxide in approximately 450mL of water.?
  • A solution of 12.6g of non-elecrtolyte compund in 75.0g of water freezes at -3.26 C. What is the molececular?
  • A solution of CuCO3 has a [Cu2+] - 1.5 x 10 negative 5 and [ co3 to the 2-] = 3.2 x 10 to the negative 6?
  • A solution of HNO3 has a pH of 1.282. What is the concentration of the solution?
  • A solution of KOH has a pH of 9.935. WHat is the concentration of the solution?
  • A solution of muriatic acid, HCl, reacts with Fe(2)O(3) deposits...?
  • A stoichiometric question,,?
  • A student needs to prepare 145mL of a 1.6M solution of Copper II Sulfate (CuSO4)?
  • A substance in which the elements combine chemically and lose their original identity is called a?
  • A substance that dissociates in water to form hydrogen ions and is a proton donor is a/an...?
  • A substance that dissociates in water to form hydroxide ions and is a proton accepter is a/an?
  • A substance that has a solid state with a density less than the liquid state?
  • A substance that is NOT soluble in a polar solvent is:?
  • A substance that is NOT soluble in a polar solvent is?
  • A substance used because it dissolves exothermically?
  • A suspension contains 2400mg of active drug in 1000ml. What is the percentage of drug in the final product?
  • A synthesis reaction between magnesium (Mg) and oxygen (O2) might produce:?
  • A tank contains 7.3 moles of...?
  • A theory is an accepted explanation of an observerd phenomenom until.?
  • A tire pump is attached to a balloon?
  • A titration question below with details...?
  • A titration required 19.80mL of 0156M NaOH solution. How many moles of NaOH were in the volume?
  • A top industrial chemical produced in the United States for many years has been...?
  • A truck carrying concentrated nitric.?
  • A very difficult problem are you ready?
  • A very hard chemistry question, I think...plz help?
  • A weather balloon is filled with ...?


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