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Assume that a gold atom is shaped like a sphere. An atom of gold has a radius of 156 pm and a mass of 197 amu. Determine the density of a single gold atom in units of g/cm3. (1 amu = 1.66 x 10-24g)
A gas cylinder that contains argon has an internal volume of 6.88 L. A pressure gauge attached to the cylinder reads 1810 psi
determine the partial pressure and the total pressure in a 2.50 L vessel containing the following mixture of gases at 17.8 degrees celsius
For the reaction SO3+H2O=H2SO4 calculate the percentage yield if 600 g of sulfur trioxide react with excess water to produce 475 g of sulfuric acid
what mass of limestone is required to remove all the sulfur dioxide formed by the combustion of 7.5 104 kg of coal that is 0.33 mass % sulfur?
the mass natural abundance of the isotopes h and d are 99.985 and 0.015 respectively. the mass natural abundance of
mole of naphthalene(C10H8), a solid, is burned in a constant- volume bomb calorimeter at 298K, 5150 kJ of heat is evolved. Calculate delta H for the raction on a molar basis.
A 613-mL sample of unknown HCl solution reacts completely with Na2CO3 to form 11.1g CO2 . What was the concentration of the HCl solution
Draw the structure of the peptide in its predominant ionic form at a)pH 2; and b) pH 8 and determine its net charge at the specified pH values c) draw a titration curve of PH with respect to a dual axis with the equivalents of HCl added and the ne..
Find the maximum temperature (for cases a and b) that can be attained in the burning of methane at constant P according to the reaction CH4(g) + 2O2(g) --> CO2(g) + 2H2O(g)
A gas mixture, with a total pressure of 300. torr, consists of equal masses of Ne (atomic weight 20.) and Ar (atomic weight 40.). What is the partial pressure of Ar, in torr
write a report about the chemical equation about the combusiton of butane. the report must include the equation, a brief history about the combustion of butane and its importance to the world and any dangers involved.
What is the half-life? b) How long would it take for the concentration of CH3CN to decrease to 25% of its initial value? c) To 12.5% of its initial value?
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