2. Sodium fluoride, NaF(s), is one of the most commonly used compounds for fluoridating water supplies. When sodium fluoride is decomposed, sodium and fluorine are produced:
2 NaFis) → 2 Na(s) + F2(8)
Suppose a sample of Naf was decomposed by electricity, yielding 99.8 g of sodium. What is the
mass of fluorine, in grams, that was also produced?
(4 marks)
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when atmosphere interacts with biosphere they focuses on on the sources and sinks of green house gases (ghgs) air pollutants, particular matters, water and energy between the earth's surface and the atmosphere. the biosphere affects the climate. the atmosphere and biosphere are in constant interaction with each other, and all living things rely on gases in the atmosphere for life. organisms such as animals take in oxygen gas form the atmosphere to use in every cell of their body for smooth functioning of daily routine exercises.

c) should be the answer.