When is somehting both an electrophile and nucleophile.

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium

This statement about matter and its behavior is best classified as a