The raw materials for phosphorus production are substances of the group 1) Сa3P2, SiO2, C

The raw materials for phosphorus production are substances of the group 1) Сa3P2, SiO2, C 2) PCl5, SiO2, CO3) Ca3 (PO4) 2, C, SiO2

The history of the creation of a chemical element that entered science under the name “phosphorus” is associated with the name of the Hamburg scientist Henning Brand. The creation of the chemical element in question dates back to 1669. Phosphorus reacts with a number of chemical elements, while other chemical compounds and elements are formed during the reaction. Phosphorus can be obtained from a number of chemical elements. In the example considered in the initial assignment, the production of phosphorus seems to be possible from the substances represented by the group: Ca3 (PO4) 2, C, SiO2.
Answer. 3.