Calculate A CFL produces approximately four times more light output per watt than incandescent lamps do. This means that a 100-W incandescent lamp can be replaced
with 25-W CFL. If you replaced 15 100-W bulbs with 25-W CFLs, how many fewer watts
of power will you use? If your electric bill for the incandescent lights was $20 in a month
and you use the CFLs for the same number of hours, what would the new bill be?

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.