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The molecular formula mass of this compound is 240 amu. What are the subscripts in the actual molecular formula?
A box contains 12600 red marbles and 885000 yellow marbles. What sample size is required to reduce the sampling standard deviation of red marbles to 1.85%?
Benzene freezes at 5.5 degrees celcius and the resulting solution freezes at 2.13 degrees celcius. What is the freezing point depression constant of benzene?
What is the ratio of the number of electrons for each atom of lead over one atom of aluminum
Calculate the concentrations of all species present, the pH, and the pecent dissociation of HCN
1) Determine the pressure in a 0.34L balloon if the temperature is 35(celcius) and the balloon contains 0.0233 mol of an ideal gas
A 48.1 mL sample of gas in a cylinder equipped with a piston is warmed from 22 degrees C to 90 degrees C. what is the volume at final temperature?
Carbon dioxide has an enthalpy of sublimation of 25.2 kJ/mol at -78 OC. If 0.975 kg of dry ice is placed into a bowl open to the atmosphere (i.e., constant pressure), what is the entropy of sublimation at this temperature
It takes 208.4 kJ of energy to remove 1 mole of electrons from 1 mole of atoms on the surface of rubidium metal. How much energy does it take to remove a single electron from an atom on the surface of solid rubidium
A sample of gas is collected over water at 14 degrees Celsius. The pressure of the resultant mixture is 113.0 kPa. What is the pressure exerted by the hydrogen alone?
Air is 21 mole percent oxygen, that is, 0.21 atm oxygen at 1 atm. Suppose the pH of the water is 5.91 and that the concentration of iron(II) in the water is 3.29x 10-5 M, what is the potential of the corrosion reaction under the above conditions a..
Would it be possible to vary the temperature of a system consisting of water and ethanol (CH3CH2OH) while maintaining an equilibrium between solid, liquid, and vapor phases?
A buffer is prepared by adding 25.0 mL of 0.12 M HCl(aq) to 55.0 mL NaCH3CO2(aq). What is the solubility of BaF2 in this buffer solution
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