Question

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

Answer 1

Answer:

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 mole
• Cl₂: 1 mole
• HCl: 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?

$moles of H_{2} =\frac{15 moles of Cl_{2} *1mole of H_{2}}{1moles of Cl_{2}}$

moles of H₂= 15

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