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Sergio [31]
3 years ago
7

The ___ is the short form that chemists use to identify an element

Chemistry
1 answer:
slavikrds [6]3 years ago
6 0

Chemical symbols

Explanation:

Chemical symbols are used to represent and identify elements in chemistry. Elements are distinct substances that cannot be split into simpler substances by chemical means.

They are made up of only one kind of atoms.

  • Each element is symbolized by a chemical symbol.
  • A chemical symbol consists of:  
  1. A capital letter
  2. A capital letter followed by a small letter derived from English or Latin or Greek name of the element.

Examples are:

               Hydrogen            H

                Nitrogen             N

Learn more:

Chemical symbol brainly.com/question/4670413

#learnwithBrainly

                       

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If 72.5 grams of calcium metal (Ca) react with 65.0 grams of oxygen gas (O2) in a synthesis reaction, how many grams of the exce
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2Ca + O2 = 2CaO
First, determine which is the excess reactant
72.5 g Ca (1 mol) =1.8089725036
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65 g O2 (1 mol) =2.0313769611
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Since the ratio of to O2 is 2:1 in the balanced reaction, divide Ca's molar mass by 2 to get 0.9044862518. this isn't necessary because Ca is already obviously the limiting reactant. therefore, O2 is the excess reactant.

Now do the stoichiometry
72.5 g Ca (1 mol Ca) (1 mol O2)
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=0.0282669621 g of O2 left over
5 0
3 years ago
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