# How many moles of #NO_2# are present in 65.85g?

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Ramsha
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Aug 3, 2016

#### Answer:

use formula and periodic table, they will be a big help to solve this type of questions.

#### Explanation:

formula: Number of moles= weight of substance (in grams) divided by the atomic mass of the substance

therefore, n= 65.85/46.0067

= 1.431 mol

N= 14.0067

+O2= 2*16.00= 32

NO2= 46.0067

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