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Problem- Suppose that the atomic mass unit (amu) had been defined as one-twentieth of the average mass of an atom of carbon instead of one-twelfth of the mass of an atom of carbon-12. What would the average atomic mass of aluminum be on this new scale?
What would the value of Avogadro's number be on this new scale?
Show all work, use additional paper if necessary.
According to the second law of thermodynamics, the change in the entropy of the universe (DeltaSuniv) during a spontaneous reaction
Utilize resonance structures to show the delocalization over four carbons of the positive charge, unpaired electrons and negative charge of benzeyl cations, radical, anion.
How many milliliters of 5.0 M K2Cr2O7 solution must be diluted to prepare 250 mL of 0.10 M solution
How do you calculate the rate of change of absorbance per minute over the first 3 minutes to get units, U/ml, total units and percent recovery?
Problem- Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 1.40 MJ of energy (in the form of heat) if the temperature of the sodium is not to increase by more than 10.0 °C
a sample of pure caco3 weighing 0.2500g is dissolved in hydrochloric acid and the solution diluted to 250.0ml in a
Assuming that all the solutions have a density of 1.0 g/cm3 and a specific heat capacity of 4.18 J/ºC.g, calculate the enthalpy change for the neutralization of HCl by NaOH. Assume that no heat is lost to the surroundings or to the calorimeter.
When the two cylinders are connected and the gases mixed, the pressure in each cylinder becomes 8.71 atm. What is the volume of cylinder B?
The accepted value (mu) for a standard sample of chloride was 34.63 percent chloride. Triplicate analysis of this material by a new procedure yielded a mean value of 34.71 and an estimated standard deviation of 0.04
A quantity of N2 occupies 62.2 L at a partic- ular temperature and pressure. Its density is 0.900 g/L. How many moles of N2 are in the container?
According to Charles's law, for a fixed quantity of gas at constant pressure, which of the given quantities is constant
in a coffee-cup calorimeter 1.80 g of nh4no3 is mixed with 75.0 g of water at an initial temperature of 25.00degc.
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