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The beta blocker drug, thimolol, is expected to reduce the need for heart bypass surgery. Its composition by mass is 49.4%C, 7.64%H, 17.7%N, 15.2%O, amd 10.1% S. Determine its empirical formula
Assume that the density of the H+ solution is 1.00 g/ml and that its specific heat capacity equals that of water. The initial and final temperatures are 22.0 C and 65.8 C. Calculate the ΔH of the reaction per mole of magnesium.
calculate the minimum concentration of cr3 that must be added to 0.095 m naf in order to initiate a precipitate of
a cylinder measuring 3.4 cm wide and 4.0 cm high is filled with gas. The piston is pushed down with a steady force measured to be 275 kpa
Calculate the values of E for the cell when the following volumes of the Cu titrant have been added: (Activity coefficients may be ignored as they tend to cancel when calculating concentration ratios.
The vapor pressure for methanol and ethanol at 50 C is 406 and 222 Torr, respectively. Calculate the total vapor pressure of a mixture at 50 C that contains 0.2 mol of methanol and 0.1 mol of ethanol.
how do you write two half balanced equations for the following acidic solution MnO4^-(a)+Fe(s)--->Mn^2+(aq) +Fe^2+(aq)
how many liters of gas would be formed at 510 degrees c and 1.00 atm pressure by explosion of 405g of nh4no3 ?given the
The pH of an aqueous weak acid solution is 6.20 at 25 degree celsius. Calculate the Ka for the acid. The initial concentration of the acid is 0.010M
How many grams of no2 will be produced when 5.00 moles of NO react?
at 1 atm, how much energy is required to heat 55.0 grams of water at -24.0 degrees Celsius to water at 157.0 degrees Celsius
differentiate acids from compounds that contains hydrogen and an anion, or oxyanions and are not acids
the enthalpy fusion of methanol is 3.16 kJ/mol. How much heat would be absorbed or released upon freezing 25.6 grams of methanol?
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