angscott9638
06.07.2019 •
Chemistry
Amatch has about 21 milligrams of red phosphorus coating the tip. how many atoms of phosphorus is this?
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Ответ:
4.083 * 10^20 atoms.
Explanation:
One Mole of phosphorus contains 6.022 * 10^23 atoms (Avogadros number)'
Since 1 mole of Phosphorus has a mass of 30.974 grams, 21 milligrams has
6.022 * 10^23 * 0.021 / 30.974
= 0.004083 * 10^23
= 4.083 * 10^20
Ответ:
D
Explanation: