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1. It is observed that a solution B of 2.57 g with molar mass 132.6 g/mol and 34.28 g of A froze at 53.1 degree Celsius temperature while we have solution A the freezing point of pure substance A is 72.0 degree Celsius determine the value of Kf for solution A?
2. Compute how many ml of C2H3NaO2(0.2 M) need to be added to 200 mL of 0.1 M CH3COOH to make a buffer of pH 5 and also find out what would be the total concentration of C2H3O2 be in this (acetate + acetic acid) solution ?
As of 2007 world record for swimming 1500.0 m in a long course pool is 14 min 34.56 s. if we follow this rate then calculate how many seconds would be taken by a man to swim 0.850 miles?
How many gm of dry NH4Cl need to be combined to 2.30L of a 0.300M solution of NH3, to prepare a buffer solution of pH 8.85.
Question enthalpy and entropy values are given and were asked to find boiling point of mercury
Calculate the pH of this solution? if we want to lower the pH by one unit of this solution then How many mL of 0.1 M H 3 PO 4 should be added to this solution?
If the actual yield is 220.0 g and the theoretical yield is 275.6 g then what will be the percent yield of ferrous sulfide.
Assemble the alcohols (have the formula of C4H10) in the order of increasing reactivity with concentrated HCl.
Calculate How many mL of the HCl solution was required for the titration.
Questions on chemical equations - Write a balanced equation for this reaction. Include the states of matter for each compound.
Calculate the standard free energy change for the process N2O5(s)-->N2O5(g) at 25 0C if Vapor pressure of N2O5 at 7.5 degrees C is 100mmHg, and the solid sublimes at a pressure of 1.00 atm at 32.4 0C.
How many grams of water should be produced and What is the theoretical yield of nitrogen?
Calculate kc for the reversible reaction and determine what is the activation energy
Calculate the binding energy of the 2s electron in iron and calculate the binding energy of the 2s electron in iron. Does the new energy agree better with experiment?
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