please can i actually please receive help because i have been stuck for many hours

Question

Question 1: 3 Cu  +   8HNO₃  --> 3 Cu(NO₃)₂   +  2 NO  +  4  H₂O

In the above equation how many moles of water can be made when 36 moles of HNO₃ are consumed?

Question 2: Sodium chlorate decomposes into sodium chloride and oxygen gas as seen in the equation below.

­­2NaClO₃­ --> 2NaCl +3O₂

How many moles of NaCl were produced by 9 moles of NaClO_3­? Round your answer to the nearest whole number.

Question 3: 2 NH₃  +  3 CuO   g  3 Cu  +  N₂  +   3 H₂O

In the above equation how many moles of N₂ can be made when 67 moles of CuO are consumed?

Please give and only give explanation and solution please.

Answer 1

You use the coefficients as molar ratios:

Question 1: 3 Cu  +   8HNO₃  --> 3 Cu(NO₃)₂   +  2 NO  +  4  H₂O

In the above equation how many moles of water can be made when 36 moles of HNO₃ are consumed?

36molHNO3 × (4molH2O/8molHNO3)=18 mol H2O

Question 2: Sodium chlorate decomposes into sodium chloride and oxygen gas as seen in the equation below.

­­2NaClO₃­ --> 2NaCl +3O₂

How many moles of NaCl were produced by 9 moles of NaClO_3­? Round your answer to the nearest whole number.

9molNaClO3 × (2molNaCl/2molNaClO3)=9molNaCl

Question 3: 2 NH₃  +  3 CuO   g  3 Cu  +  N₂  +   3 H₂O

In the above equation how many moles of N₂ can be made when 67 moles of CuO are consumed?

67molCuO × (1molN2/3molCuO)=22.3 mol N2