How do you Calculate the mass percent composition of nitrogen oxide?

Answer 1

There is a formula to calculate the mass percent composition (which can be found in your reference table T for chemistry students)

mass of element

----------------------- X 100

gram-formula mass

First of all you need to find the gram formula mass:

2 N atoms= 2(14.0 amu) = 28.0 amu

6 O atoms= 6(16.0 amu)= 96.0 amu

then add together

124 amu

Then plug in with the formula:

(2X 14)

----------- X 100% = 22.58% = % Nitrogen

124 amu

To check to make sure the answer is correct the percentages of the individual elements must addd up to 100%. So you would then need to find the % oxygen. which is 77.41%. So in this case 77.41%

+ 22.58%

is 99.99% which can be rounded to 100% so in this case the answer is correct.

Answer 2

Nitrogen Dioxide, NO2

Relative molar mass, Mr = 14.0 +16.0 x 2

= 46.0 g/mol

Percent composition oxygen = 32.0/46.0 x 100

= 69.6%

Percent composition nitrogen = 14.0/46.0 x 100 (or 100 - 69.6)

= 30.4%

Answer 3

do you mean the percentage by mass of nitrogen or oxygen in nitrogen oxide?

First work out the mass of one mole of nitrogen oxide

Then work out the mass of the number of moles of nitrogen / oxygen in one mole of nitrogen oxide

Divide this by the mass of one mole of nitrogen oxide and then multiply by 100.

Answer 4

Whats the percent composition of N2O?