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A radioactive 32P nucleus has a half-life of 14.3 days. If a 50.00 g sample is allowed to decay naturally, how much time passes until only 1.00 g of 32P remains?
A compound is 42.9% C, 2.4% H, 16.7% N, and 38.1% O, by mass. Addition of 6.00 grams of this compound to 50.0 ml benzene, C6H6 (d = 0.879 g/mL), lowers the freezing point from 5.53 to 1.37 degrees celsius. What is the molecular formula of this com..
The pH of a bicarbonate-carbonic acid buffer is 6.95. Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-)
A sample of vapor has the composition 50% A and 50% B. What is the composition of the boiling liquid that produced this vapor
what are the metabolic and physiological processes that increase the concentration of protons and carbon dioxide in the
The distance between layers in a crystal is 265 pm. X rays are diffracted from these layers at an angle of 20.1°. Assuming that n = 4, calculate the wavelength of the X rays in nm.
Potassium iodate, KIO3, and bleach's hypochlorite ion, ClO negative, are oxidizing agents. What do they oxidize in this experiment
The vapor pressure of ethanol is 60.1 torr at 25.0 degree C, and its molar heat of vaporization is 39.3kj/mol. Estimate the temperature at which the vapor pressure of ethanol would equal 350. torr?
A gas sample in a piston assembly expands, doing 588 kJ of work on its surroundings at the same time that 372 kJ heat is added to the gas.
Suppose that Part II of the experiment were carried out with aqueous NaOH (sodium hydroxide) instead of Ba(OH)2 to form soluble Na2SO4
The concentration of Fe2+ in a sample of water is 350 mmol/L At what pH will 99% of the Fe2+ be precipitated as Fe(OH)2? Ksp = 7.9 x 10-15
What is the equivalent mass of metal that is dissolved in sulfuric acid during hydrogen release if 2.27 g metal reacts with 30 ml 33 w/w% H2SO4 (density 1.25 g/cm^3,
a voltaic cell is based on the reactionsns i2 s --gt sn2 aq 2i- aq. under standard conditions what is the maximum
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