How many moles of h2o can be formed when 4.5 moles of nh3 react with 3.2 moles of o2?

4nh3 + 5o2 yields 4no + 6h2o

a)3.8 mol h2o
b) 4.8 mol h2o
c) 6.4 mol h2o
d) 6.8 mol h2o

Hi Sentpain! Thanks for asking a question here on . 

Solving: 

4 NH3 +5 O2 = 4 NO + 6 H2O 

☛ Find the ratio for NH3 and O2. That's 4:3 
☛ 4.5 x 5 /4 = 5.6 
☛ Find the ratio for O2 and H2O. That's 5:6
☛ 3.2 x 6 / 5 = 3.8

 3.8 mol H2O - choice A

Hope that helps! ★ If you have further questions about this question or need more help, feel free to comment below or leave me a PM. -UnicornFudge aka Nadia