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deff fn [24]
3 years ago
10

Suppose that 4.9 mol no2 and 0.40 mol h2o combine and react completely. which reactant is in excess?

Chemistry
1 answer:
Elina [12.6K]3 years ago
4 0
Answer is: NO₂ (nitrogen (IV) oxide) <span>is in excess.

Balanced chemical reaction: </span>3NO₂(g) + H₂O(l) → 2HNO₃<span>(l) + NO(g).
n(</span>NO₂) = 4.9 mol.
n(H₂O) = 0.4 mol.
From chemical reaction: n(NO₂) :(H₂O) = 1 : 3.
For 0.4 mole of water, we need: 0.4 mol : n(NO₂) = 1 : 3; n(NO₂) = 1.2 mol.
Because we have more than 1.2 moles of nitrogen(IV) oxide, this molecule is in excess.
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klasskru [66]

Answer:

P_4+5O_2\rightarrow P_4O_{10}

Explanation:

Hello!

In this case, when we want to balance chemical reactions such as in this case, the idea is to equal to number of atoms of each element at each side of the equation according to the lay of conservation of mass, just as shown below:

P_4+5O_2\rightarrow P_4O_{10}

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