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Elis [28]
3 years ago
7

Sulfur has 16 electrons. When it combines with magnesium. It acquires A -2 charge. How many electrons does it have now?

Chemistry
1 answer:
Rainbow [258]3 years ago
8 0
18 electrons. With a -2 charge, that means it gains two electrons.
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What is the percentage of hydrogen in c2h4
jarptica [38.1K]

Ethylene- C2H4 = 85.7% Carbon and 14.3% Hydrogen


Find the atomic masses for each element and multiply it by the number of atoms in the compound, then add.


C- 12.0 * 2= 24.0


H- 1.00 * 4= 4.00


-----------------------


28.0


Take the masses for each element and divide it by the total mass. Then change the answer to get the percent.


C 24.0 / 28.0= .857 = 85.7%


H 4.00 / 28.0= .143 = 14.3%


<h3>Ethylene is 85.7% Carbon and 14.3% Hydrogen </h3>
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