angoraspinner
03.07.2019 •
Chemistry
Asample of urea contains 1.121 g of n, 0.161 g of h, 0.48 g of c, and 0.64 g of o. what is the empirical formula of urea?
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Ответ:
The empirical formula is N2 CH4 O
Explanation:
Ответ:
Ozone (O3) is composed of the ozone gas (90% of the total ozone in the atmosphere). The ozone has three oxygen atoms, and it is the result of the action of Ultra Violet (UV) radiation on oxygen molecules, composed of two oxygen atoms.
Explanation:
ozone is harmful for living things. But if it's still far away up, it won't contaminate the air.