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77julia77 [94]
3 years ago
7

Batteries are a source of __________ energy. chemical potential mechanical

Chemistry
2 answers:
antoniya [11.8K]3 years ago
8 0

Answer:

Yes, it is a chemical source, because it uses chemicals like alkaline to generate power.

Yes ... and no. It's a chemical device for producing electrical energy. It all depends on how you wish to use the words.

Explanation:

dimaraw [331]3 years ago
3 0

Answer:

Batteries store chemical energy

Explanation:

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Exothermic Synthesis

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The following data was collected when a reaction was performed experimentally in the laboratory.
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Answer:

Mass = 279.23 g

Explanation:

Given data:

Number of moles of Fe₂O₃ = 3 mol

Number of moles of Al = 5 mol

Maximum amount of iron produced by reaction = ?

Solution:

Chemical equation:

Fe₂O₃ + 2Al    →     Al₂O₃  +  2Fe

Now we will compare the moles of iron with Al and iron oxide.

                          Fe₂O₃     :       Fe

                             1           :        2

                             3          :       2×3 = 6 mol

                            Al          :          Fe

                              2         :           2

                               5        :           5 mol

The number of moles of iron produced by Al are less so Al is limiting reacting and it will limit the amount of iron so maximum number of iron produced are 5 moles.

Mass of iron:

Mass = number of moles × molar mass

Mass =   5 mol  ×  55.845 g/mol

Mass = 279.23 g

 

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