According to chemist John Dalton, if one mole of oxygen is combined with two moles of hydrogen to form one mole of water (when hydrogen has an atomic number of 1 and an atomic mass of 1, and oxygen has an atomic number of 8 and an atomic mass of 16), then this compound has an atomic mass: of 42 grams per mole (42 daltons) of 38 grams per mole (38 daltons) of 32 grams per mole (32 daltons) of 20 grams per mole (20 daltons) of 18 grams per mole (18 daltons)

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Q: each

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A:

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Scientific Notation

We have to deal with quantities that are extremely large or very small. For example- I may have 6,500,000,000 red blood cells, or the diameter of an iron atom is 0.000000011 inches. Numbers with many zeros can be inexpedient to work with, so scientists use scientific notation. It represents very large numbers or very small numbers in a simple form. We know that whole numbers can be extended to infinity, but we cannot write such large numbers on paper. Numbers that present in millions of places after the decimal point need to be represented simply. Thus, it is difficult to represent a few numbers in their extended form. Therefore, we use scientific notation.