Oxygen forms a number of compounds with nitrogen, many of which are quite reactive. one such compound is 36.86 % by mass n . calculate the number of grams of oxygen present in a sample of this compound that contains 56.00 grams of n .

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efimia efimia · Answer 1 · 2018-09-04T12:43:02+02:00

Mass percentage is defined as the ratio of mass of the element to the total mass of the compound.

The formula of mass percentage is given by:

Mass percentage = [tex] \frac{mass of the element}{total mass of the compound}\times 100 [/tex] (1)

mass of nitrogen = 56.00 grams

Let x be the total mass of the compound.

Put the given values in formula (1):

[tex] \frac{36.86}{100} =\frac{56.00 g}{x} [/tex]

x= [tex] \frac{100}{36.86}\times 56 g [/tex]

x= 151.92 g

total mass of the compound = 151.92 g

To calculate the mass of oxygen in grams, subtract the mass of nitrogen from the total mass of the compound.

Mass of oxygen = 151.92 g - 56 .00 g = 95.92 g

Thus, mass of oxygen in grams = 95.92 grams.