The number of oxygen atoms present in 50g of calcium carbonate is

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6.023×1023

30.1×1023

9.035×1023

1.206×1024

answer is C.

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Detailed Solution

1 mole of CaCO3 = 100g100g of CaCO3 contains 3grams atoms of 'O'100g of CaCO3 contains 3NA atoms of 'O'50g of CaCO3 contains 'X' atoms of 'O'

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