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A unit of heat energy that was formerly used frequently was the calorie (cal). Calculate the calorimeter constant for the coffee-cup calorimeter in terms of cal/g degrees C.
Molar concentration, 2.20g of solid NaOH are added to 250mL of a 0.10M FeCl2 solution. Given that Ksp for Fe(OH)2 is 1.6 x 10 -14, calculate the following
The mixture is 20% benzene by volume. A densitometer gives the density of the mixed stream to be 1.1 g/mL. What are the mass fractions of all three species?
Ethanol melts at -114 celcius and boils at 78 celcius . The enthalpy of fusion of ethanol is 5.02 KJ/mol , and its enthalpy of vaporization is 38.56 KJ/mol.
Enough of a monoprotic acid is dissolved in water to produce a 0.0189 M solution. The pH of the resulting solution is 6.25. Calculate the Ka for the acid.
Drawing and naming structures; IUPAC names, Give the structure or structures and the IUPAC names of the alkenes formed from the dehydrohalogenation of the following compounds with a strong base
what is the final temperature of this water/ethanol mixture? (Note: Assume there are no chemical interactions between the water and the ethanol that affect the temperature.)
For each of the following processes, decide whether it is spontaneous or non-spontaneous.
Construct quantum mechanical operators for the following observable: (1) the inverse separation 1/x
Determine which of the following reactions are oxidation-reduction reactions and which are not. what type of reaction do you have if it is not an oxidation-reduction reaction?
Given that a sample of air is made up of nitrogen, oxygen and argon in the mole fractions 78% N2, 21% O2 and 1.0% Ar, what is the density of air at sandard temperature and pressure?
After growing up your protein in E. coli and centrifuging the cells to collect the cell pellet, at what temperature should you store the cells?
Explain why a mercury-in-glass thermometer with a uniform-bore capillary that is correct at 0 celsius and 100 celsius read 49.9 celsius when the temperature is actually 50 celsius.
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