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Chemistry, 23.06.2019 07:30
In a laboratory determination of the atomic weight of tin, a sample of tin is weighed in a crucible. nitric acid is added, and the reaction proceeds to give a hydrated tin(iv)oxide plus no2and h2o. the hydrated tin(iv)oxide is then heated strongly and reacts as follows: sno2.xh2o(s)sno2(s)+ xh2o(g)the sno2is finally cooled and weighed in the crucible. explain the effect on the calculated atomic weight of tin that would result from each of the following experimental errors: (a)considerable spattering occurs when the nitric acid is added to the tin.(b)the hydrated tin(iv)oxide is not heated sufficiently to change it completely to tin oxide.
Answers: 2
Chemistry, 23.06.2019 08:50
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An isotope undergoes radioactive decay by emitting radiation that has no mass. what other characteristic does the radiation have?
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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.
Answers: 1
Which method preserves an image of a leaf ?
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