Find the number of particles in each of the following: a) 1.50 x 10^(-2) moles of oxygen molecules

b) 907 moles of neon atoms

c) 0.000 000 000 081 4 moles of Co2 molecules

d) 12.4 moles of dollars

pls help! explanation pls!​

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.