A silicon -containing ore has 92% 28Si, 5% 29Si and 3% 30Si. Calculate the relative atomic mass of the silicon.

Answer Details

The relative atomic mass of silicon can be calculated as follows: Relative atomic mass of silicon = (92% * 28Si atomic mass) + (5% * 29Si atomic mass) + (3% * 30Si atomic mass) where the atomic masses of 28Si, 29Si, and 30Si are, respectively, 28, 29, and 30 atomic mass units (amu). So, the relative atomic mass of silicon = (92% * 28 amu) + (5% * 29 amu) + (3% * 30 amu) = (0.92 * 28 amu) + (0.05 * 29 amu) + (0.03 * 30 amu) = 25.76 + 1.45 + 0.9 = 28.11 amu Therefore, the relative atomic mass of silicon is 28.11 amu.