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beks73 [17]
3 years ago
13

Helium and nickel are examples of ________. These

Chemistry
1 answer:
emmasim [6.3K]3 years ago
3 0

Answer:

Elements, in turn, are pure substances—such as nickel, hydrogen, and helium—that make up all kinds of matter.

Hope This Helps!       Have A Nice Day!!

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How many grams of mercury are needed to react completely with 157g of sulfur to form hgs?
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<span>To solve this we need to balance the equations first.
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 One mole of Hg requires one mole of S to form one mole of HgS.
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So 4.90 moles of S reacts with 4.90 moles of Hg.
Hence there are 4.90 moles of 4.90 of Hg.
 Mass = number of moles * molar mass of Hg
Mass = 4.906 * 200.59 = 982.891g</span>
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