Wood logs will burn at a steady
rate when used in a campfire,
but sawdust may explode if it<...
Chemistry, 03.10.2021 05:30 kassandramarie16
Wood logs will burn at a steady
rate when used in a campfire,
but sawdust may explode if it
becomes ignited by a spark.
Which factor best accounts for
this difference?
A Concentration of gases
B Comparative surface area
C Relative temperature
D Presence of catalysts
Answers: 2
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)ï‚®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
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