Question #e44f6
1 Answer
Explanation:
Write down the balanced chemical equation for this reaction and take a look at the mole ratio that exists between the two reactants
#"N"_ (2(g)) + color(red)(2)"O"_ (2(g)) -> color(blue)(2)"NO"_(2(g))#
As you can see, the reaction consumes
The problem provides you with the number of moles of nitrogen gas available for the reaction. Use the aforementioned mole ratio to determine how many moles of oxygen gas would be needed in order to make sure that all the moles of nitrogen as raect
#1.25color(red)(cancel(color(black)("moles N"_2))) * (color(red)(2)color(white)(a)"moles O"_2)/(1color(red)(cancel(color(black)("mole N"_2)))) = "2.50 moles O"_2#
At this point, you can say that if the
If that sample contains more than
Use oxygen gas' molar mass to determine how many moles of oxygen gas you have available
#50.0 color(red)(cancel(color(black)("g"))) * "1 mole O"_2/(32.0color(red)(cancel(color(black)("g")))) = "1.563 moles O"_2#
As you can see, you don't have enough oxygen gas to ensure that all the moles of nitrogen gas take part in the reaction, so
Oxygen gas,
#"O"_2# , will be your limiting reagent
Now, the reaction will completely consume the oxygen gas and leave you with excess nitrogen gas.
Notice that you have a
#1.563color(red)(cancel(color(black)("moles O"_2))) * (color(blue)(2)color(white)(a)"moles NO"_2)/(color(red)(2)color(red)(cancel(color(black)("moles O"_2)))) = "1.563 moles NO"_2#
To convert this to grams, use nitrogen dioxide's molar mass
#1.563color(red)(cancel(color(black)("moles NO"_2))) * "46.006 g"/(1color(red)(cancel(color(black)("mole O"_2)))) = color(green)(|bar(ul(color(white)(a/a)"71.9 g"color(white)(a/a)|)))#
The answer is rounded to three sig figs.