Hi I need so much help before the school ends and I am crying I am so confused and stressed please help me with my chemistry homework

Question

1.) 2 NH3 + 3 CuO --> 3 Cu + N2 + 3 H2O

In the above equation how many moles of N2 can be made when 157.4 grams 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 moles of hydrogen are needed to make 192.4 grams 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 explain please solve please help

Answer 1

1.So based on the equation 3 moles of CuO produces 1 mole of N2.This mole ratio is used to determine the moles of nitrogen formed.

First the grams of CuO is used to get the moles of CuO present by dividing mass by RMM(79.5gmol)

157.4g/79.5gmol=1.98moles

Then you use the moles of CuO to find the moles of N2

You divide the moles by 3 since the mole ration is 3:1.

1.98moles/3=0.66 moles of N2

To the tenth position-0.7 moles of N2.

2.In the equation 2 moles of Hydrogen is used to produce one mole of methane.To get the moles of methane produce from mass given you divide the mass by the RMM of methane.192.4grams/16gmol-1=12.03 moles of methane.

Hydrogen to methane mole ration is 2:1 so you multiply the moles of methane by 2.This gives 24.05 moles of Hydrogen.

24.1 moles of Hydrogen is needed to produce 192.4 grams of methane.