what are the three assumption when adding of oxide percentage to 128 in the calculation of elements because most elements bound to oxygen in the form of silicate
1. The assumption that the oxide percentage added to 128 represents the total amount of oxygen present in the compound or mineral being analyzed.
2. The assumption that the element is bound to oxygen in the form of a silicate, which suggests a specific chemical structure and ratio of elements.
3. The assumption that the remaining percentage after subtracting the oxide percentage from 128 can be attributed to the element in its pure form or in combination with other elements.