Which one goes where?
...
Answers: 2
Chemistry, 23.06.2019 00:30
You are attempting to recrystallize a crude product mixture. you add the appropriate amount of hot solvent and are allowing the solution to slowly cool to room temperature. however, at room temperature no crystals have appeared, which of the following methods should be used to induce crystallization? choose all correct answers. a) place the flask in an ice bath. b) swirl the contents of the flask. c) add a small seed crystal of the desired product. d) scratch the inside of the glassware using a stir rod. it can be multiple choices
Answers: 3
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 08:30
Sand is more likely than shale to preserve fossils. true false
Answers: 2
Spanish, 08.12.2020 02:20
Social Studies, 08.12.2020 02:20
History, 08.12.2020 02:20
Mathematics, 08.12.2020 02:20
Mathematics, 08.12.2020 02:20
World Languages, 08.12.2020 02:20
Biology, 08.12.2020 02:20
Mathematics, 08.12.2020 02:20
Mathematics, 08.12.2020 02:20
Mathematics, 08.12.2020 02:20
Chemistry, 08.12.2020 02:20
English, 08.12.2020 02:20
Geography, 08.12.2020 02:20