What hydroxide concentration is needed to remove
The concentration of Mg2+ in seawater is 0.052 M. What hydroxide concentration is needed to remove 90% of the Mg2+ by precipitation?
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You\'d like to calculate the bubble-point temperature of the mixture, and the composition of the vapor formed at the bubble-point temperature two different ways.
You use your 8 binoculars to focus on a yellow-rumped warbler (length 14 cm ) in a tree 18 m away from you. What angle (in degrees) does the image of the warbler subtend on your retina?
Determine the total amount of heat which must be added or removed in the reactor per 100kg of hydrogen produced.
Suppose 3% of cotton fabric rolls and 3% of nylon rolls contain flaws. Of the rolls used by a manufacturer, 70% are cotton and 30% are nylon. What is the probability that a randomly selected roll used by the manufacturer contains flaws? Round your
Assume all temperatures to be exact, and neglect significant figures for small changes in dimension. An ideal gas in a cylinder is at 12 degrees C and 2.0atm .
A bat emits a sound whose frequency is 82.2 kHz. The speed of sound in air at 20.0 oC is 343 m/s. However, the air temperature is 37.3 oC, so the speed of sound is not 343 m/s. Assume that air behaves like an ideal gas, and find the wavelength of
The electric field just above the surface of the charged drum of a photocopying machine has a magnitude E of 3.1 x 105 N/C. What is the surface charge density on the drum, assuming that the drum is a conductor?
Oxygen tanks are filled by compressing the oxygen gas as shown. An initially evacuated 1 m3 tank is to be filled to 13,000 kPa. Determine the total work required by the compressor.
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Problem: Sterile needles used for patient injections O typically have four components: cannula, shaft, hub, and bevel.
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