Chemistry, 18.10.2021 07:30, annapittbull12
13. Which of the following is true about mixtures and compounds?
O A. A compound forms when different substances chemically combine to form a new substance.
OB. A mixture contains different substances that are not chemically combined with one another.
O C. Mixtures and compounds are both made of two or more different substances.
O D. all of these
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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
13. Which of the following is true about mixtures and compounds?
O A. A compound forms when differ...
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