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Given the reaction, H2 + Cl2 → 2HCl, if 12.0 moles of HCl were made, then how many moles of H2 were used?


24.0 moles


12.0 moles


6.00 moles


3.00 moles

Respuesta :

jcherry99

Answer:

C

Explanation:

Balance the equation

It is balanced.

Put the known number of moles under the HCl

H2 + Cl2 → 2HCl

                     12

Put an x under the desired unknown.

H2 + Cl2 → 2HCl

  x                  12

Set up a proportion

1/x = 2/12

Solve

Cross multiply

2x = 1 * 12

2x = 12                   Divide by 2

2x/2 = 12/2

x = 6

The answer is C  

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