chemistry question

Question

The following chemical equation has NOT been balanced.

 

zinc nitride + chlorine --> zinc chloride + nitrogen

 

How many moles of chlorine gas are needed to react fully with 14.7 g of zinc nitride?

Answer 1

Hello, Kambri,

Could you explain which part of this problem is the most confusing? There are a lot of steps, beginning with finding the formulas for the compounds and balancing the equation. It would help if you could ask specific questions about what you'd like help on.

We need to balance the equation, so I'll offer that as a start. I'll assume this was the reason for your post. If you need more, please let me know.

I come up with the following:

1 Zn₃N₂ + 3 Cl₂ = 3 ZnCl₂ + 1 N₂

Check it, but I think it is balanced.

From this we know that we need 3 moles of Cl₂ for every 1 mole of Zn₃N₂. We have the mass for Zn₃N₂ (14.7g), so we can calculate the moles by dividing 14.7g by Zn₃N₂'s molar mass (g/mole). Multiply that number by 3 to obtain the number of moles of chlorine gas needed.

I'd be glad to help if you need more guidance,

Bob