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How many grams of oxygen are needed to react completely with 200.0 g of ammonia, nh3? 4nh3(g) + 5o2(g) ®4no(g) + 6h2o(g)
a. 469.7 g
b. 300.6 g
c. 250.0 g
d. 3.406 g
e. 2.180 g?