Hola I need much assistance with my homework please as soon as possible please

Question

1.) 2 NH3 + 3 CuO → 3 Cu + N2 + 3 H2O

In the above equation, how many grams of N2 can be made when 11.8 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

2.) For the reaction C + 2H2 → CH4, how many grams of hydrogen are required to produce 14.9 moles of methane, CH4 ?

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
Carbon	12

please please help explain and solve

Answer 1

Hello, Holly,

I answered a similar problem for you and am wondering if you could explain which part of the process is proving the most difficult. Also, it would be nice to post as far as you got. Having the molar masses already calculated for the key compounds would not only help save time for those answering, but would also demonstrate what portions of the problem don't need explaining. Thanks.

Part 1: The balanced equation promises us one mole of nitrogen for every 3 moles of CuO. Bummer, but we know the molar ratio is (1/3) N₂/CuO. Since we start with 11.8 moles of CuO, we'll get 11.8*(1/3) moles of N₂. That's 3.93 moles N₂. Multiply by the molar mass of N₂ to find grams (110 grams).

Part 2. The molar ratio of H₂ to CH₄ is 2. We need twice as many moles of hydrogen to produce a mole of CH₄. We have 14.9 moles of methane, so we'll need 2*14.9 = 29.8 moles of H₂. At 2 g/mole, that is 59.6 grams.

Bob