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In a combustion experiment, it was found that 12.096 g of hydrogen molecules combined with 96.000 g of hydrogen molecules to form water and released 1.715 x 10^3 kJ of heat. Calculate the corresponding mass change in this process?
what mass of ethanol c2h5oh a nonelectrolyte must be added to 10.0 l of water to give a solution that freezes at
From the 1H NMR spectrum of dibenzalacetone can you deduce what stereoisomer(s) of dibenzalacetone is (are) formed. The chemical shift of the alkene protons is downfield from the expected resonance. What is the shift due to
How many kilocalories are required to produce 1.39 mol of aluminum? 2Al2O3 yields 4Al+3O2; (delta) H = +801(kcal/mol (+3350 kJ/mol )
what is the minimum amount of 6.0 M H2SO4 neccessary to produce 23.5 g of H2(g) according to the following reaction? 2Al(s) +3H2SO4(aq) --> Al2(SO4)3(aq) + 3H2(g)
A lead bullet is fired at a wooden plank. At what speed must bullet travel to melt on impact, if its initial temperature is 25oC and the heating of the plank is neglected.
Write the complete electron configuration of lead (not the simplified condensed notation using the enarest inert gas)
A stream of air (21% O2 m, the rest N2) flowing at a rate of 10.0 kg/h is to be mixed with a stream of CO2 inside a mixer. The CO2 enters the mixer at a rate of 20.0 m/h at 150 ?C and 1.5 bar. What is the mole percent of CO2 in the product stream
What would the molar concentration of the tree sap have to be to achieve this pressure on a day when the temperature is 28?
A buffer solution was prepared by mixing 25.0 ml of 0.5M sodium acetate with 35.0ml of 0.6M acetic acid. Calculate the pH. The Ka for acetic acid is 1.7x 10^-5
A flask contains a small amount of liquid at 25oC. The vapor pressure of the liquid in the flask is 109 torr. If the volume of the flask were to double
Name three similarities or differences between this hormone and insulin. Name three similarities or differences between this hormone and cortisone
Make a pH- log concentration plot for carbonate (10^-3) and acetate acid (10^-4) for total concentrations.
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