D: 90 percent of people live in Caracas
Answer:
Explanation:
Castellfollit De La Roca es un municipio español de la comarca de La Garrocha, en la provincia de Gerona, dentro de la comunidad autónoma de Cataluña. Pertenece al partido jurídico de Olot.
Answer:
None
Explanation:
Quartz is a silicate mineral. It is made up of interlocking chain of silica that forms a framework pattern. Pure quartz is made up of silica and silica alone. Silica has a formula of SiO₂. Quartz is pure silica.
Fe and Mg are not in the framework of silica. They even rarely occur as impurities in the structure of the mineral.