How many moles of hydrogen gas(H2) are needed to react with 15 moles of chlorine gas

15 moles of hydrogen gas are needed to react with 15 moles of chlorine gas.

Explanation:

The balanced reaction is:

H₂ (g) + Cl₂ (g) → 2 HCl (g)

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of the compounds participate in the reaction:

H₂: 1 moleCl₂: 1 moleHCl: 2 moles

Then you can apply the following rule of three:  If 1 mole of Cl₂ reacts with 1 mole of H₂, 15 moles of Cl₂ with how many moles of H₂ does it react?

moles of H₂= 15

15 moles of hydrogen gas are needed to react with 15 moles of chlorine gas.

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