16. Radioactive element has 2 isotopes. The relative abundance of one element is 65% with a mass of 29.37. The remainder has an atomic mass of 31.05. Find the average atomic mass of the element.
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Aspirin has a density of 1.40 g/cm3 what is the volume in cubic centimeters of a tablet weighing 320 mg ?

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)