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Luba_88 [7]
3 years ago
11

What is the function of tunnels and passageways in subsurface mining?

Chemistry
2 answers:
zysi [14]3 years ago
7 0

Answer: to reach mineral ores on the surface of earth

Explanation:

Orlov [11]3 years ago
3 0
ANSWER: b. to reach mineral ores on the surface of the earth
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What is the radius of a hydrogen atom whose electron is bound by 0.544 ev? express your answer with the appropriate units?
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First, we need to calculate the principal quantum number n for this electron, using the equation:
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