Can someone please help me with these chemistry problem. Thanks.

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2NH3+2O2-->N2O+3H2O

1.) If 80.0 grams of O2 are reacted in the above reaction, how many grams of N2O will be produced?

May 19th, 2015

2NH3 + 2O2 --> N2O + 3H2O 
we need to compare moles of reactants and products. remember 2g H2 = 1mole yet 2g O2 = 0.0625moles. we need to convert mass to moles and then compare moles of the 2 components. 

80g O2 / 32g/mole = moles O2 reacted = 2.5moles O2 

the molar ratio of oxygen to dinitrogen oxide = 2:1 so for every 2moles O2 used, only 1mole N2O is produced. 

2.5moles O2 ( 1N2O / 2O2 ) x molar mass N2O = mass N2O2 produced 
2.5moles O2 (1N2O/2O2) x 44g/mole = 55 g N2O produced 

May 19th, 2015

Thank you so much for your help.

May 19th, 2015

you are welcome


May 19th, 2015

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