Giovanni created this chart to study for an exam. which best describes how to correct the error in the chart? remove “plastics” from the uses for sodium hydroxide. swap the uses for iron oxide and calcium carbonate. change the use for calcium chloride to “used in preservatives.” add “de-ice roads” to uses for calcium carbonate.

Calcium carbonate when mixed with water result in the formation of Calcium hydroxide which is used as an antacid. The chloride ion also helps in the whitening of teeth thus finding its use as an ingredient in toothpaste.

Iron oxide is dark pigment which is naturally used in makeup.

the answer is swap the uses for iron oxide and calcium carbonate. on edg

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.