Quartz contains two atoms of what?
Quartz is made up of a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two Si-centered tetrahedra, giving an overall formula SiO2.
So quartz has two Oxygen atoms to one Silicon atom.
The chemical formula of quartz is SiO2, showing that each formula unit contains two oxygen atoms. The gram formula mass of SiO2 is 60.08. Therefore, 1.00 gram constitutes 1.00/60.08 or about 1.66 X 10-2 formula units. The number of oxygen atoms will be 2 (exact) X Avogadro's Number X 1.66 X 10-2 or about 2.00 X 1022 atoms, to the justified number of significant digits
Diatomic molecules contain two atoms of the same element, such as H2 and O2. However, in nature the two atoms of the same element may not be identical. They may be isotopes, in which the number of neutrons differs between atoms. So a diatomic molecule consisting of two identical atoms would have to contain two atoms of the same isotope, such as two hydrogen-1 atoms or hydrogen-2 atoms. Note: The 2 after the H and…
The chemical composition of quartz is Silicon Dioxide, or SiO2. From the molar mass of quartz, 1.60 grams = 26.6 millimols. There are two moles of oxygen for every mol of SiO2, so there are 53.2 millimols of oxygen present. Given Avogadro's number (6.022 E 23), the result is 3.204 E22 atoms of oxygen.