Question

3 Cu + 8HNO3 → 3 Cu(NO3)2 + 2 NO + 4 H2O

In the above equation, how many grams of water can be made when 6.3 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

Answer 1

3 Cu + 8HNO3 → 3 Cu(NO3)2 + 2 NO + 4 H2O

n(HNO3)=6.3mol

unknown/known=4/8=1/2

n(H2O)=n(HNO3)/2=3.15mol

m(H2O)=nxM=3.15x(1+1+16)=56.7g

Let me know if its wrong