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How many methylene cyclopropene derivatives with molecular formula C4H2Cl2 are possible? Show them.
What might one do to verify that the global strain-energy minimum has been identified
Explain why heat change at constant pressure and constant volume have definite values.explain the terms exothermic endothermic and heat of reaction.
Anhydrite (CaSO4). Calculate the equivalent values for the bonds in anhydrite and comment on the differences between the two minerals.
a 0.692 g sample of glucose c6h12o6 is burned in a constant volume bomb calorimeter. the temperature change is measured
The heat of fusion, ?Hfus, of ethanol (C2H5OH) is 4.9 kJ/mol. The heat of sublimation of ethanol, for the process C2H5OH(s) ? C2H5OH(g) , is 43.5 kJ/mol. What is the heat of vaporization of ethanol?
a glucose solution contains 56.0 rm g of glucose rmc6 rmh12 rmo6 in 440 rm g of water. compute the freezing point and
Calculate the entropy change when 100 g of argon is heated and compressed from 300 K, 1.0 atm, to 900 K, 17 atm
The average brewed cup of coffee contains 453 mg/L caffeine. What volume (in ml) of coffee should be diluted to 25ml prior to analysis using only standard transfer pipets with integer values from 1-10ml
a closed vessel contains water oil and air at room temp. if the system is synthesized by first adding the water and
A solution contains a mixture of cl- and br- ions . can both be positively identified? write appropriate equations to support your
The mass of an electron is 9.11 * 10^{-31} kg. If the de Broglie wavelength for an electron in a hydrogen atom is 3.31*10^{-10}m, how fast is the electron moving relative to the speed of light?
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
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