Edexcel IAL Chemistry AS 1.4 Relative mass, molar mass and ppm
Edexcel IAL Chemistry AS 1.4 Relative mass, molar mass and ppm
Build the formula mass from relative atomic masses, convert ppm to the stated mass or volume fraction and retain the required units and significant figures.
How this is tested
- Calculate relative atomic, molecular or formula mass from isotope or formula data.
- Convert ppm into mass, gas volume or particle number for the stated sample.
- Use percentage by mass to test fertiliser, polymer or pollutant composition claims.