(Answered) Ammonia reacts with oxygen to form nitric oxide and water

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Ammonia reacts with oxygen to form nitric oxide and water vapor: 4NH3 + 5O2 ---> 4NO + 6H2O When 20.0 g NH3 and 50.0 g O2 are allowed to react, which is the limiting reagent?

A) NO

B) O2

C) H2O

D) no reagent is limiting

E) NH3

What is the coefficient for O2 when the following combustion reaction of a hydrocarbon is balanced? ___C7H14 + ___ O2 ---> ___ CO2 + __ H2O

A) none of these

B) 10

C) 11

D) 21

E) 42

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