COULD SOMEONE CHECK MY WORK? I WILL AWARD BRAINLIEST a solution was made by dissolving 800.0g of NaOH in 2.00L of water. With the answers given, show the work of solving the problems

Molarity answer is 10moles/L

My work: 800.0gNaOHx1molNaOH/39.118 g NaOH=20.4509434

20.4509mol NaOH/2.00L H20x 1L H2O/1kg
=10.22moles/L

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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.