HELP ---> 3 Cu + 8HNO3 --> 3 Cu(NO3)2 + 2 NO + 4 H2O

Question

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

In the above equation how many moles of water can be made when 144.1 grams 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

It looks like the equation is already balanced for you, so the first step will be to convert 144.1 grams of HNO₃ to moles. To do this find the molar mass, and use to to do your conversion.

Using the numbers provided for mass, this is the equation:

1(1.0) + 1(14) + 3(16) = 1 + 14 + 48 = 63 g/mol

144.1 g HNO₃ x 1 mol HNO₃ = 2.287 mol HNO₃

63 g HNO₃

Now that you know how many moles of HNO₃ you're starting with, use the ratio of moles in the equation to find the moles of H₂O produced. The coefficient of HNO₃ is 8, and H₂O is 4

2.287 mol HNO₃ x 4 mol H₂O = 1.144 mol H₂O

8 mol HNO₃

Since the question asks that the answer be rounded to the nearest tenth, 1.1 moles H₂O is the answer