Which reason best explains why metals are shiny?
1 answer:
Answer:
Best:
because their valence electrons absorb light
Minor:
because their valence electrons move to higher energy levels
Explanation:
When the electrons absorb light, they absorb this energy and they have a tedency to jump and get promoted to the high energy level.
As a result, they release out energy after being promoted. This energy is in form of light
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a) 56g
<h3>Calculation:</h3>At STP,
22.4 L of N₂ = 1 mol
We have given 44.8 L of N₂, therefore,
44.8 L of N₂ =
= mol
We know that,
1 mol of N₂ = 28 g
Hence,
2 mol of N₂ = 28 × 2
= 56g
Hence, there are 56 g of N₂ in 44.8 L of nitrogen gas.
Learn more about calculation at STP here:
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Answer:
look at the picture above
