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torisob [31]
3 years ago
12

How is coal usually used​

Chemistry
1 answer:
Daniel [21]3 years ago
4 0

Answer:

Coal is primarily used as fuel to generate electric power in the United States.

Explanation:

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FinnZ [79.3K]
True, because most chemical reactions have more moles but not really.
Also that they decompose better. "not really"
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The half-life of phosphorus-32 is 14.30 days. how many milligrams of a 20.00 mg sample of phosphorus-32 will remain after 85.80
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The amount of sample that is left after a certain period of time, given the half-life, h, can be calculated through the equation.

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Over-the-counter hydrogen peroxide solutions are 3% (w/v). What is this concentration in moles per liter?
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<span>1 ml of water weighs 1 gram so 1 liter (1000 ml) weighs 1000 grams. A 3% solution (3% = 0.03) of hydrogen peroxide (w/v) would contain 1000 grams x 0.03 or 30 grams. The chemical formula of hydrogen peroxide is H2O2 and a mole weighs 34.0147 grams/mole. So 30 grams of H2O2 divided by 34.0147 grams/mole equals 0.88 moles of H2O2. The concentration of a 3% (w/v) hydrogen peroxide solution therefore contains 30 grams of H202 (or 0.88 moles of H202) per in a liter of water (or 1000 grams H20) would thus be 0.88 moles H2O2 per liter (0.88 moles H2O2/l) .</span>
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3 years ago
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