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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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How many moles of N2O5 are needed<br> to produce 7.90 g of NO2?
Roman55 [17]

Answer:

0.085 moles of  N₂O₅ are needed

Explanation:

Given data:

Mass of NO₂ produces = 7.90 g

Moles of N₂O₅ needed = ?

Solution:

2N₂O₅       →     4NO₂  + O₂

Number of moles of NO₂ produced :

Number of moles = mass/ molar mass

Number of moles = 7.90 g/ 46 g/mol

Number of moles = 0.17 mol

now we will compare the moles of NO₂   with N₂O₅.

                NO₂          :       N₂O₅

                  4            :          2

                0.17          :         2/4×0.17 = 0.085 mol

Thus, 0.085 moles of  N₂O₅ are needed.

4 0
2 years ago
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