Determine the mass percent composition of a solution made by dissolving 57.1 g of KF in 919 g of H2O.

What does earth’s rotation on its axis cause? the tides night and day passing of years phases of the moon

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?

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