1.

Calculate the total number of atoms present in 9 grams of water

Answer»

9 is 1/2 of18, meaning that 1/2 mole is present in 9 g of water. 1/2 *6.022*10^23=3.011*10^23molecules H2O. However, if you want to know how many ATOMS are present in3.011*10^23, you must then multiply by 3 (2 hydrogen atoms and 1 oxygen atom per molecule), and get9.033*10^23 atoms.



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