Chemistry, 21.04.2021 16:40 jessiegarrison1
List 3 observations about the changes the earth has gone through since its beginnings until now.
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Assuming complete dissociation of the solute, how many grams of kno3 must be added to 275 ml of water to produce a solution that freezes at -14.5 c? the freezing point for pure water is 0.0 c and k_f is equal to 1.86 c/m
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Acompound has the molecular formula c3h8. which class of organic compounds does it belong to?
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Chemistry, 23.06.2019 07:20
Which of the following are acids or bases? 1. sodium hydrogen 2. barium hydroxide solution 3. carbonate solution
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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)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
List 3 observations about the changes the earth has gone through since its beginnings until now....
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