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2NO(g) + O2 (g) --> 2NO2

How many moles of O2 are required to produce 46.0 g NO2?
A. 0.500 mol
B. 0.250 mol
C. 1.00 mol
D. 8.00 mol

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Respuesta :

take 46g / 46 g/mol = 1 mol NO2 produced
1 mol * 1/2 = 0.5 mol O2 needed  (1/2 ratio between NO2 and O2)

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