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Which acid is present in lemon ?
The combustion of 135 mg of a hydrocarbon produces 440mg of CO2 and 135 mg of H2O. The molar mass of the hydrocarbon is 270 g/mol.
All chemical reactions, spontaneous and non spontaneous require an energy "push" in the form of energy of activation. why is the reaction called spontaneous if energy is required to start the reaction
Calcium and Magnesium carbonates occur together in the mineral dolomite. Suppose you heat a sample of the mineral to obtain the oxides,CaO and MgO
calculate the ph of a solution that is made by combining 125 ml of 0.050 M hydrofluoric acid with 50 mL of 0.10 M sodium fluoride
Methane and hydrogen sulfide form when 36g H2 texts with carbon disulfide. Calculate the percent yield if the actual yield of CH4 is 69.8g.
A mono methyl-substituted 1-naphthol is permitted to couple with a diazonium prepared from a mono-substituted hydroxyaniline. Explain how many different coupling products can be acquired assuming all patterns of the starting materials are availabl..
Carbon tetrachloride was widely used for many years as a solvent until its harmful properties became well established. Carbon tetrachloride may be prepared by the reaction of natural gas (methane, CH4) and elemental chlorine gas in the presence of..
Plants utilizes CO2 (g) and H2O (l) as well as energy from the sun to create glucose (C6H12O6) and oxygen gas. Explain what is the minimum amount of energy from the sun necessary to produce 4 g of glucose in this way. Hf of glucose is -1260 kJ/mol..
prepare 100 mL each of five standard solutions: 2.00 x 10-5, 5.00 x 10-5, 1.00 x 10-4, 2.00 x 10-4, and 5.00 x 10-4 M. These will serve as your analytical standards, which means that their phosphate concentrations must be precisely known.
A patient is given 0.050 mg of technetium-99m ( where m means metastable- an unstable but Lon lived state) a radioactive isotope with half-life of about 6.0 hours. How long until the radioactive isotope decays to 6.3 * 10-3 mg?"
A 0.100 M solution of a certain weak acid, HA, is found to have a pH of 2.45. Calculate the % ionization for the acid. Enter the answer as a decimal number with 3 decimal places. Do not enter the units.
Determine the pH of the equivalence point for a reaction in which 0.100 mol/L NaOH(aq) neutralizes 10.0 mL of 0.250 mol/L HF(aq)
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