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Why does fluorine always hae negative charge while other halogen do not always show negative charge? They become positive some times.
The retention volume for a solute was found to be 76.2 mL for a column with Vm = 16.6 mL and Vs = 12.7 mL. Compute the capacity factor and the distribution coefficient for the solute.
a particular engine has a power output of 4.00 kw and an efficiency of 28.0. assume the engine expels 6000 j of energy
naturally occurring zirconium exists as five stable isotopes 90zr with a mass of 89.905 amu 51.45 91zr with a mass of
Compound a C9H12, undergoes nitration to give three products. The 1H NMR spectrum of A shows a complex three-proton multiplet at 6.92-6.99? And a nine-proton singlet at 2.34. Explain what is the structure of A
Find the new pressure inside the flask
calculate the specific heat capacity of zinc given that a 65.5g sample loses 2008J of heat when cooled from 100.0 degrees celcius to 21.1 degrees celcius.
Problem- Since molarity is a concentration unit used mainly by chemists, the concentrations of commercial solutions are normally measured by the % of solute in the solution. Household vinegar is a 5%( by volume) solution of acetic acid in water.
1. Why was excess dry ice used in step 3 of the procedure? 2. Why do gas laws use degrees Kelvin rather than degrees Celsius? 3. Were you surprised at how accurately the mass of a molecule of CO 2 could be determined With such simple equipment?
Problem- What volume is milliliters of 9.950 x 10-2M sodium hydroxide solution is required to reach the equivalence point in the complete titration of a 17.0mL sample of 0.114M phosphoric acid
Explain what is the molar concentration of the final NaOH solution at 25°C
Question- Why can moles of reactants and products, rather than their concentrations, be used in the equilibrium constant expression
calculate the vapor pressure of the pressure cooker if the temperature inside the pressure cooker is 119 degree celcuis.
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