Nitric acid is composed of HNO3 molecules. A sample weighing 4.50 g contains 4.30 X 10^22 HNO3 molecules. How many nitrogen atoms are in this sample? How many oxygen atoms are in 61.0 g of nitric acid?

1 molecules of contains 1 molecules of nitrogen atoms.

So, molecules of contains molecules of nitrogen atoms.

Now, 61 g of contains :

Now , 1 molecule of nitric acid contains 3 molecules of oxygen.

So, number of oxygen molecules in 61 g nitric acid is :

Hence, this is the required solution.

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