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What mass of Na2CO3 is needed to prepare 250.mL of 0.0500 Molartity of Na2CO3 solution
select (a) best and (b) poorest electrical conductors from the following solutions and explain the reason for your choices: 0.10 M NH3, 0.10 M NaCl, 0.10 M CH3OOH(acatic acid), 0.10 M CH3CH2OH(ethan
what is the difference between oxy-mercuration, hydroboration, and acid hydrogenation
A compound A (C22H27NO) is insoluble in acid and base but reacts with concentrated aqueous HCl and heat to give a clear aqueous solution from which, on cooling, benzoic acid precipitates.
A 25.00 ml aliquot of a nitric acid solution of unknown concentration is pipette into a 125ml Erlenmeyer flask and 2 drops of phenolphthalein are added.
The sample is titrated to the phenolphthalein endpoint with 15.17 ml of a sodium hydroxide solution. What is the molar concentration of the NaOH solution
silver has only two naturally occurring isotopes 107ag with a mass of 106.90509amu and an abundance of 51.84% and 109ag with a mass of 108.9047 amu calculate the atomic mass of silver.
What are the mole fractions of C6H6 (x1), C3H6 (x2), O2 (x3) and N2 (x4) in the fresh feed stream. What is n6, the molar flow rate of the recycle stream
carbon tetrachloride is a useful solvent for both IR absorption and Raman spectroscopy because it has few vibrational modes
What is a variable which has no effect on the rate of a chemical reaction under any circumstance is
Soggy french fries drenched in Vinegar, which is a 0.83M solution of acetic acid. If the acetic acid in vinegar is 0.47% dissociated, calculate Ka for acid. What is the pH of this solution
A solution of .637g of the solid in 24.1g of the solvent diphenyl gave a freezing point depression of 1.76 degree celsius. Calculate the molar mass and molecular formula of the solid(k1 for diphenyl
Ammonium nitrate is a common ingredient in fertilizers that can also be used to make explosives because it decomposes as follows
how did rutherford interpret the observation that only a very few of the a particles were scattered by the gold foil
Knowing that the arenium ion intermediate has positive charge on the ortho and para carbons, draw each resonance structure - one which shows the positive charge on the ortho carbon and one which sho
A solution is prepared by mixing 0.3355 moles of NaNO3(84.995g mol^-1) with 235.0g of water(18.015g mol^-1). It's density is 1.0733g ml^-1. What is the morality of the solution and percent by weight
The rate constant for a certain chemical reaction is. 0.0125 L mol^-1 s^-1 at 25 degree Celsius and 0.0125 L mol^-1 s^-1 at 50.0 Celsius. What is the activation energy for the reaction, expressed in
A Solution of 1.69g of this compound in 9.23g of benzene freezes at 2.18 degree celsius. What are the molecular formula and molar mass of the compound? ( the normal freezing point of pure benzene is
What is the pH of a 0.200M ammonium Percholate solution, NH4ClO4 The ionization constant of ammonia is 1.8x10^-5
In the pie chart graphs the percent natural abundance fo ci-35 (atomic mass 34.969) is represented as grean, and the percent natural abundance for cl-37 atomic mass 36.966 amu is represented as yell
explain why rutherford expected all alpha particles to go through the gold foil undisturbed.
What is the heat capacity of a bomb calorimeter if the combustion of 2.757 mmol of salicylic acid (C7H6O3(s), Hcomb = -3022 kJ/mol) increases the temperature of the calorimeter by 2.612°C
A solution of .601g of the solid in 34.1g of the solvent diphenyl gave a freezing point depression of 1.17 degree celsius. Calculate the molar mass and molecular formula of the solid(k1 for diphenyl
Silver has only two naturally occurring isotopes 107ag with a mass of 106.90509 amu and an abundance of 51.84% and 109 ag with a mass of 108.9047 amu. calculate the atomic mass of silver.
What evidence exist to support the theory that an atom contains a massive nucleus that is very small relative to the size of the whole atom