Calculate the mass fraction of nitrogen in the mineral fertilizer KNO3.
| November 29, 2020 | education
To calculate the mass fraction of an element, you need to find the total atomic mass, then find the relative molecular weight of the desired element and divide it by the total atomic mass, then multiply by 100%
KNO3 = 39 + 14 + 16 • 3 = 101
(14: 101) • 100% = 13.8%
Mass fraction of nitrogen is 13.8%
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