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

Question

Chemistry

Jensen Cummings

8 March, 04:51

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

+4

Answers (1)

Know the Answer?

Patton · Answer 1

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

Given the reaction, H2 + Cl2 → 2HCl, if 12.0 moles of HCl were made, then how many moles of H2 were used?24.0 moles12.0 moles6.00 moles3.00 moles

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