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24.08.2019 •
Chemistry
How many grams of nitrogen are required to react with 2.79 grams of hydrogen to form ammonia?
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Ответ:
H2 = 2 g/mol
N2 = 28 g/mol
Mole ratio:
3 H2 + N2 = 2 NH3
3 x 2 g H2 28 g N2
2.79 g H2 ??
2.79 x 28 / 3 x 2 =
78.12 / 6 => 13.02 g of N2
Ответ:
Explanation :
Electric current is the flow of electric charge per unit time.The electric current passes through conductors. Conductors have free electrons. The number of free electrons is responsible for electric current.
Metals are conductors. So, they will conduct electricity. Sulfur and Selenium are non metals. Antimony is a metalloid and only tin is a metal.
Out of given elements, Tin (Sn) will carry electric current easily.