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Question: could someoe please help me with these questions how many...

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Could someoe please help me with these questions?

How many mole of oxygen atoms are present in 1 mole of nitrous acid, HNO2?

If the atomic mass of carbon is 12.0 g/mol, how many of mole of carbon atoms are present in 600 grams of the element?

If the atomic mass of sodium is 23.0 g/mol and the atomic mass of chlorine is 35.5 g/mol, how many of mole of NaCl molecules are present in 100 grams of the salt?

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