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The purity of gold alloys is expressed in karats, which is the mass fraction of gold multiplied by 24. Pure gold is 24 kt, whereas 10 kt gold jewelry typically contains 41.666667% gold, 29.166667% silver and 29.166667% copper (by mass). Estimate the density of this 10 kt gold alloy.
Suppose that a fully charged lead-acid battery contains 1.50 of 5.00 . What will be the concentration of in the battery after 2.50 of current is drawn from the battery for 8.50
calculate the root mean square speed and its average kinetic energy per molecule of nitrogen and water vapor.a
Explain the difference between exposure to radioactivity from a source external to the body versus a source that has been consumed and is therefore inside the body.
what is the freezing point of an aqueous 2.65 m calcium chloride cacl2 solution? the freezing point of pure water is
what mass of ethylene glycol hoch2ch2oh must be dissolved in 4.510 kg of water to result in a freezing point of
The dipole moment and the normal boiling point of acetaldehyde (CH3CHO) are 2.7 D and 293 K, respectively. The dipole moment and the normal boiling point of n-octane (C8H18) are 0 D and 298 K.
Write the equation showing the S-trans to S-cis equilibrium of the two conformations for a. (E)-1,3-pentadiene b. (Z)-1,3-pentadiene and which equilibrium will favor the s-tans conformation more strongly
Antacid #1 has 1700 mg of sodium bicarbonate, antacid #2 has 500 mg of calcium carbonate. Which tablet is capable of reducing the most acid and why
Explain Pressure of dry butane gas, Chemistry lab write up and I have to determine the pressure of the dry butane gas.
Combine the above two equations with that for the formation of liquid water and use addition and/or subtraction(i.e. Hess's Law) to arrive at the equation for the formation of magnesium oxide.
What is the solubility of BaF2 (Ksp = 1.8x10-7) in pure water in grams per liter? The molecular weight of BaF2 is 175.
Calculate the pH of a buffer solution that contains 0.25 M benzoic acid (C6H5CO2H) and 0.15 M sodium benzoate (C6H5COONa). [Ka = 6.5 ? 10-5 for benzoic acid]
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