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If a 1.000g sample of red phosphorus powder was burned in air and reacted with oxygen gas to give 2.291g of phosphorus oxide. Compute the empirical formula as well as molecular formula of phosphorus oxide give the molar mass is approximately 282g/mol?
What is the sum of the stoichiometric coefficients when the reaction is balanced to lowest common denominator
Determine the fraction of the energy radiated by the sun in the visible region of the spectrum (350 nm to 700 nm). (Assume the sun's surface temperature is 5800 K.)
calculate the maximum mass in grams of h2s that can form when 155 g aluminum sulfide reacts with excess water according
Glucose is approximately .10 % of human blood, by weight. Glucose has a formula weight of 180 g/mol. What is the conc of glucose in ppm
The final temperature of a mixture of solution prepared by dissolving 2.50 gram of NaOH in 75.0 mL of water (both initially at 25 degrees C) increases to 25.5 degrees C. Is this process exothermic or endothermic. What is the enthalpy of solution o..
A 4.305-gram sample of a nonelectrolyte is dissolved in 105 grams of water. The solution freezes at -1.23°C. Calculate the molecular weight of the solute. Kf for water = 1.86°C/m.
The Kow for carbon tetrachloride is 220. Using the rule of thumb that log(Koc) = .8*log(Kow), and assuming an organic carbon content of 1% you can estimate the retardation factor for carbon tetrachloride.
The decomposition of nitric oxide NO to N2 and O2 is second order with a rate constant of 0.0796 M^-1 S^-1 at 737 C and 0.0815 M^-1 S^-1 at 947 C. Calculate the activation energy.
Suppose helium nuclei has exactly the same mass as adding two single protons and neutrons, the Sun's luminosity would be
The pH of a 300 gram solution of NaOH is 12.97. The density of the solution is 1.10 g/mL. How many grams of NaOH are in the solution
A current of 3.78 A is pass through a Fe(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 5.80 g of iron
explain the dissolution of silver chloride in aqueous ammonia and its reprecipitation in terms of ionic equilibria and
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