i need immediate help with chemistry homework quickly please because no has actually helped me

Question

2 NH3 + 3 CuO → 3 Cu + N2 + 3 H2O

In the above equation, how many grams of N2 can be made when 18 moles of CuO are consumed?

Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0

Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.:

Element	Molar Mass
Hydrogen	1
Nitrogen	14
Copper	63.5
Oxygen	16

please actually help me by explaining and solving please

Answer 1

Hello, Billy,

The balanced equation says that 3 moles of CuO will produce 1 mole of N₂. That is a molar ratio of 3/1 - we only get 1 mole N₂ per 3 moles CuO. . Therefore, if we start with 18 moles CuO, we'll on,ly get (1/3)*(18 moles) = 6 moles of N₂. Thwe molar mass of N₂ is 28 grams/mole. So convert moles N₂ to grams usingf this conversion factor:

(6 moles N₂)*(28 grams N₂/mole N₂) = 168.0 grams N₂.

Bob