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Chemistry, 23.06.2019 22:30
The barometer shown in fig. p1.35 contains mercury ( 5 13.59 g/cm3 ). if the local atmospheric pressure is 100 kpa and g 5 9.81 m/s2 , determine the height of the mercury column, l, in mmhg and inhg.
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Chemistry, 23.06.2019 23:00
For a particular first-order reaction, it takes 24 minutes for the concentration of the reactant to decrease to 25% of its initial value. what is the value for rate constant (in s-1) for the reaction?
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Chemistry, 24.06.2019 00:30
An old movie poster used a quote "in space, no one can hear you scream! " why this is true or not true? a) the quote is incorrect, you can hear sound in outer space. b) sound cannot be polarized. so, you cannot hear sound in space. c) sound is an electromagnetic wave and needs no medium to travel through. eliminate d) sound needs a medium for the wave to vibrate and there is nothing in space to vibrate
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