Consider the following chemistry equation: 2C2H6 + 7O2 --> 6H2O + 4CO2 How many grams of water can be produced from 13.5 grams of C2H6?

24.3 grams H2O
2.70 grams H2O
67.5 grams H2O
47.1 grams H2O

Consider the following chemical reaction:
H2 + O2 --> H2O
How many liters of oxygen gas is needed to produce 2.73 liters of water vapor?
22.4 liters O2
30.6 liters O2
5.46 liters O2
1.37 liters O2

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error

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.