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The emission line used for zinc determinations in atomic emissionspectroscopy is 214 nm. If there are 6.00×1010atoms of zinc emitting light in the instrument flame at any giveninstant, what energy (in joules) must the flame continuously supply to achieve this level of emission?
the vapor pressure of ch3 coch3 propanone or acetone is 67 torr at 0 ? c and 222 torr at 25 ?c. what is the standard
What velocity would an electron 9.11*10^-31 kg need for its de Broglie wavelength to be that of red light 745nm ?
The standard reduction potiental for the reduction of Eu+3 to Eu+2 is -.43 volts... list atleast 3 substances capable of reducing Eu+3 to Eu+2
Calculate partition coefficient of caffeine between water and each of two organic solvents. (c) Can you use diethyl ether to extract caffeine from water? Why/why not.
what sort of interaction occurs between adjacent alcohol molecules? and what sort of interaction occurs between
the best available balances can weigh amounts as small as 10-5 g. if you were to count out carbon atoms at the rate of
What is the balanced equation for the complete combustion of 2,2,4-trimethylpentane? Show how butane can be converted to 2,2,4-trimethylpentane using petroleum refining processes
A typical home uses approximately 2000 kWh of energy per month. If the energy came from a nuclear reaction, what mass would have to be converted to energy per year to meet the energy needs of the home
what are the variables dependent independent and control in this experiment?ca2h2o-----gtcaoh2h2changing the
A 325 mL sample of gas is initially at a pressure of 721 torr and a temperature of 32°C. If this gas is compressed to a volume of 286 mL and the pressure increases to 901 torr, what will be the new temperature of the gas (reported to three signifi..
A person ate 0.919 pound of cheese (an energy intake of 7350 kJ). Suppose that none of the energy was stored in his body. What mass (in grams) of water would he need to perspire in order to maintain his original temperature? (It takes 44.0 kJ to v..
Identity the species with the larger radius in each of the following pairs. Use the concept of effective nuclear charge to explain the difference in radius for each pair. a) Cl or S b) Cl- or S2- c) Na or Mg d) Mg2+ or Al3+
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