Please someone respond and actually help me with my chemistry homework quickly 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 7.7 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.) 3 Cu + 8HNO3 → 3 Cu(NO3)2  + 2 NO + 4 H2O

In the above equation, how many grams of water can be made when 10.2 moles of HNO3 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 help by explaining and solving please.

Answer 1

In this stoichiometry, first convert moles of the reactant to moles of product using the coefficients in the balanced reaction, then multiply by molar mass of the product. It's basically dimensional analysis.

1) (7.7 mol CuO) * (1 mol N₂ / 3 mol CuO) * (28g N₂ / 1 mol N₂) = 71.9g N₂.

2) (10.2 mol HNO₃) * (4 mol H₂O / 8 mol HNO₃) * (18g H₂O / 1 mol H₂O) = 91.8g H₂O.