Elements in the same blank on the periodic table have the same number of valence electrons

Write a balanced equation showing the formation of copper (ii) nitrite from its elements

Substance a is a nonpolar liquid and has only dispersion forces among its constituent particles. substance b is also a nonpolar liquid and has about the same magnitude of dispersion forces among its constituent particles. when substance a and b are combined, they spontaneously mix.

Acompound has the molecular formula c3h8. which class of organic compounds does it belong to?