Find the C and Cl atoms in 77g of CCl4.
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Explanation:
One molecule of CCl4 has 1 carbon atom and 4 chlorine atoms. The atomic weight of carbon is 12.01 and the atomic weight of chlorine is 35.45. So the molecular weight of CCl4 is 12.01 + 4*35.45 = 153.81 g/mol. The number of molecules in a mole of any given substance is always the same: 6.022 x 10^23.
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