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one difference between mixtures and pure substances is that

a) mixtures can be physically separated.

b) mixtures are made of one type of atom.

c) pure substances have no chemical bonds.

d) pure substances can be physically separated.

Asher cycles 12 miles in 16 hours. what is his speed?

Which transition by an electron will release the greatest amount of energy? oa ob oc od

A6.0-μf air-filled capacitor is connected across a 100-v voltage source. after the source fully charges the capacitor, the capacitor is immersed in transformer oil (of dielectric constant 4.5). how much additional charge flows from the voltage source, which remained connected during the process?