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Chemistry, 24.06.2020 20:01, genyjoannerubiera
Imagine an alternate universe where the value of the Planck constant is . In that universe, which of the following objects would require quantum mechanics to describe, that is, would show both particle and wave properties? Which objects would act like everyday objects, and be adequately described by classical mechanics?1. A bacterium with a mass of 8.0 pg, 6.0 μm long, moving at 9.00 μm/s. a. quantum b. classical 2. A human with a mass of 39. kg, 1.5 m high, moving at 2.7 m/s. a. quantum b. classical 3. A buckyball with a mass of 1.2 x 10-21 g, 0.7 nm wide moving at 22 m/s. a. quantum b. classical 4. A grain of sand with a mass of 255 mg, 525 μm wide, moving at 8.00 m/s. a. quantum b. classical
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For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)
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Imagine an alternate universe where the value of the Planck constant is . In that universe, which of...
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