How many moles of NH3 would be needed to produce 1.99 x 1025 molecules of H20? Assume the reaction is 100% efficient and that oxygen gas is present in excess. A. 49.6 moles
B. 8.93 moles
C. 3.97 moles
D. 22.0 moles

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warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

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answersilicon (si); oxygen (o);

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.