12. Convert 1.98 grams of Pbso, to molecules. 13. Convert 1.98 moles of Pb(SO ), to grams.
14. Convert 8.4 x 10" molecules of L. co to grams.
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How many total moles of ions are present in 0.0158 mol of nacl?

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.