A teacher gives the balloon a positive electric charge, as shown in the figure below:
Insulating thread
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When the balloon is charged like this, it has...

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.

506g of hi produce how many grams of i2?

Beaker a contains 100 ml of 1.5 mammonia. beaker b contains 100 ml of 0.50m ammonia. how does the solution in beaker a compare to the solution in beaker b?