Determine the percent composition of nitrogen and oxygen with ...

Question

Determine the percent composition of nitrogen and oxygen with nitrogen dioxide, NO₂.

Accepted Answer

here, it says, determined the percent composition of nitrogen and oxygen with a nitrogen dioxide. All right, so what we need to do here is we need to find the mass percent of nitrogen and then the mass percent off oxygen. Remember here this will be the grams of nitrogen within the grams of the compound. Times 100 and for oxygen, it'll be grams of oxygen divided by the grams of the compound. Also times 100. If we look at nitrogen dioxide, it's composed of one nitrogen, and it's composed of two oxygen's. Multiply them by their atomic masses, which you find from the periodic table. Nitrogen weighs 14.1 g. Oxygen weighs 16 g, multiply them and then add up your totals so the mass of the compound is 46.1 g. So that's the number that goes here and here. And then all we need to do is plug in what we have for nitrogen, which is 14.1 and the mass we have for oxygen. Total oxygen is 32. So then when we do that, we're gonna get here for nitrogen. It's mass percent as 30.4% and then for oxygen, you could plug it into this formula. You could also say that we know that 100% of the compound is made up of just nitrogen and oxygen. So you could say 100% minus 34 30.4% gives us also the percentage of oxygen, so this will come out to 68.6% or actually 69 0.6%. So here we have both the mass percent off nitrogen and oxygen giving the percentages of all the compounds with all the elements within the compound are classified as the percent composition of the compound. So the compound is made up of 30.4% nitrogen and 69.6% oxygen.

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