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The sound level in a quite room is 40 dB. Approximately how many times louder is it when a TV is turned on and the sound level is 70 dB?
An electron is accelerated through an electric potential to a kinetic energy of 18.6 keV What is its characteristic wavelength?
Explain how does doubling the preliminary concentration of iodine, while keeping all others constant, affect the initial rate
solid calcium carbonate caco3 is able to remove sulphur dioxide from waste gases by the reactioncaco3 so2 other
when solid sodium bicarbonate is placed on an acetic acid solution they react to form water carbon dioxide and sodium
Why is it possible to separate the product (6-ethoxycarbonyl-3,5-diphenyl-2-cyclohexenone) from sodium hydroxide using acetone?
For the gas N2O calculate the number of grams are present in 1.05E4 mL under a pressure of 801 mm Hg at 56.3 oC.
An unknown metal with a mass of 100 g was heated to 100 C and placed into 30.0 g of water that had a temperature of 20.2 C. The final temperature of both substances
Gold forms a substitutional solid solution with silver. Compute the number of gold atoms per cubic centimeter for a silver-gold alloy that contains 44 wt% Au and 56 wt% Ag. The densities of pure gold and silver are 19.32 and 10.49 g/cm3, respectiv..
ethanol ch 3ch 2oh is mixed to gasoline to form e85 a fuel for automobiles engines. when c2h5oh 3o2 produces 2co2
Problem- The principal component of many kidney stones is calcium oxalate, CaC2O4. A kidney stone recovered from a typical patient contains 8.5 x 10^20 formula units of calcium oxalate. How many moles of CaC2O4 are present in this kidney stone
In which of these molecules or ions does the presence of nonbonding electron pairs produce an effect on molecular shape, assuming they are all in the gaseous state. Check all that apply. SiH4, PF3, HBr, HCN, SO4
A is the sequence Na, Mg, Al, Si, and P. B is the sequence He, Ne, Ar, Kr, and Xe. Which statement below is true. The members of B are decreasing in size.
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