What is the mass share?
In order to quickly and easily solve the problems ofchemistry, you first need to learn to understand the basic concepts given in the conditions of the problem. Often, for example, the term "mass fraction of a substance" is used. Consider what it is and what the mass fraction is equal to.
The mass fraction of a substance is the ratio of the mass of the dissolved substance to the mass of the entire solution. Measure this parameter in percent or in fractions of a unit.
The formula for calculating the mass fraction is as follows: ω = m1 / m * 100%, where:
- ω is the mass fraction of the substance;
- m1 - mass of the dissolved substance, measured in grams;
- m is the mass of the entire solution, measured in grams.
The mass fraction of the element is also the ratio of the relative atomic mass of the element, which is multiplied by the number of its atoms in the molecule, to the relative molecular weight of the entire substance.
The formula is as follows: ω = (n · Ar · 100%) / Mr, where:
- ω is the mass fraction of the substance;
- Ar is the relative atomic mass of the element;
- n is the number of atoms in the molecule;
- Mr is the relative molecular weight of the whole substance.
You can also benefit from the article How to find a mass share.
