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Liula [17]
3 years ago
8

5. The formula unit of calcium sulfide is :(1 Point)OCa, S,o Ca₂SO Ca23O Cas​

Chemistry
1 answer:
Lemur [1.5K]3 years ago
8 0
The formula is CaS
hope this helps
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To make a Br2 bond, how many total valence electrons are required?
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Answer:

2. 14

Explanation:

To form Br₂ bond, a total of 14 electrons are needed.

Bromine is an element in the 7th group on the periodic table. It has 7 valence electrons.

  • In forming the bromine gas, the two atoms of bromine shares 7 electrons each.
  • These electrons are from their outermost shell.
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Answer:

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  • <em>During runoff:</em> After acid rain hits the ground this polluted water can run into water sources (lakes, rivers, reservoirs).To some extent rivers are a self-renewing resource, if a small quantity of pollution discharges in it the river can return to a clean, unpolluted condition, unfortunately, if the pollution is too big the renewing won't be possible, another problem is even though rivers get cleaned the pollution moves to the seas. Lakes are even more vulnerable to pollution, the flushing effect in these water bodies is less evident than in rivers.

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