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Write balanced nuclear equations for the following transformations:
(a) bismuth-213 undergoes alpha decay;
(b) nitrogen-13 undergoes electron capture;
(c) technicium-98 undergoes electron capture;
(d) gold-188 decays by positron emission
why is normal phase chromatography ideal for separating the components chlorophyll a b and carotene in a petroleum
The vapor pressure of trichloromethane is 40.0 mmHg at -7 degrees C, and its heat of vaporization is 29.3 kJ/mol. Estimate the normal boiling point of trichloromethane.
The solubility of Ba(OH)2 * 8H2O in water at 15 degrees c is 5.6g per 100 g of water. (A) what is the molality of a saturated solution at 15 degrees c? What is the molality of the hydroxide ions?
Two identical bubbles of gas form at the bottom of a lake, then rise to the surface. Because the pressure is much lower at the surface than at the bottom, both bubbles expand as they rise. However, bubble A rises very quickly, so that no heat is e..
What is the pH after 13.3 mL of base is added? The Ka of butanoic acid is 1.5 X 10^-5.
Which pair of compounds are constitutional isomers? a) Butane and Cyclobutane. b) Cyclopentane and Methylcyclopentane. c) 3-Methylpentane and 3-Methylhexane. d) 2-Methylpentane and 2, 3-Dimethylbutane
How many different tetrapeptides containing 2 molecules of alanine and 2 molecules of valine could theoretically exist?
Calculate the number of moles of bromobenzene this represents; then calculate the amounts of all other reagents needed in this experiment relative to this amount of bromobenzene.
Suppose your dorm room is 13 ft wide by 15 ft long by 8.5 ft high and has an air conditioner that exchanges air at a rate of 1200. L/min. How long would it take the air conditioner to exchange the air in you room once
Ben Franklin dropped the oil on the surface of a lake and found that 2 mL of oil gave a circle of radius 30 m. Estimate the volumetric size of an oil molecule in angstroms, give one significant digit.
Nevertheless, in order to prevent tooth decay, F - ions are added to drinking water at a concentration of 1 mg of F - ion per L of water. How many kilograms of sodium fluoride would be needed to treat a 7.11 107 gal reservoir
Calculate the density of propanol C3H8O if you know that there are 1.069×10 25 molecules of propanol in 1.35 L.
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