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Keith_Richards [23]
3 years ago
7

Silicon is in the third period on the periodic table. Which orbital levels do its electrons occupy?

Chemistry
1 answer:
rjkz [21]3 years ago
7 0
Si  1s²2s²2p⁶3s²3p²   ([Ne]3s²3p²)
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Copper,oxygen,and____are examples of elements
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CaC2 + 2H2O → C2H2 + Ca(OH)2 If 2.8 moles of CaC2 are consumed in this reaction, how many grams of H2O are needed?
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2 years ago
In a reaction vessel, 17.6 g of solid chromium(III) oxide, Cr2O3, was allowed to react with excess carbon tetrachloride in the f
notsponge [240]

Answer:

72.53% is the yield of CrCl3

Explanation:

Given

Reaction:

Cr2O3(s) + 3 CCl4(l) → 2 CrCl3(s) + 3 COCl2(aq)

CCl4 is in excess and 17.6g  Cr2O3 present

The reaction yields 26.6g of CrCl3

To Find:

% yields of the reaction

Also given

Molar mass of CrCl3 = 158.35g/mol

Molar mass of Cr2O3 = 152.00 g/mol

By the stoichiometry of the reaction

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0r

1 x1 52 g of Cr2O3 gives 2x 158.35 g of CrCl3

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8 0
3 years ago
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