The molecule of organic matter contains 4 oxygen atoms, and its mass fraction in this substance is 10%.
| August 13, 2021 | education
The molecule of organic matter contains 4 oxygen atoms, and its mass fraction in this substance is 10%. What is the mass of a portion of this thing with a chemical amount of 5 mol?
The atomic mass of oxygen is 16 amu, 4 atoms weigh 4 * 16 = 64 amu. The molar mass of the substance is 64 * (100%: 10%) = 640 g / mol. The total mass of 5 mol is 5 * 640 = 3200 g.
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