Question 11 (0.5 points) How many moles of NO2 are needed to react with 1.32 g H2? NO2 + H2 à NH3 + H20 ESPA

0.19 moles of NO₂ are needed.

Explanation:

Given data:

Mass of hydrogen = 1.32 g

Moles of NO₂ needed to react = ?

Solution:

Chemical equation:

2NO₂ + 7H₂   →     2NH₃+ 4H₂O

Number of moles of hydrogen:

Number of moles = mass/molar mass

Number of moles = 1.32 g/ 2 g/mol

Number o moles = 0.66 mol

Now we will compare the moles of hydrogen and nitrogen dioxide.

                H₂               :            NO₂

                 7                 :              2

              0.66              :           2/7×0.66 =0.19

0.19 moles of NO₂ are needed.