Respuesta :

Answer:

Explanation:

2.38 moles

There are 2.38 moles present in a 200-gram sample of sodium bicarbonate with a chemical formula of NaHCO3.

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Answer:

Number of moles = weight of substance / molar mass of substance. Therefore, 100 grams of N2 = 100/ 28 moles. Number of molecules of N2 = number of moles x Avogadro number. Since, N2 is diatomic molecule which contain two atoms of nitrogen.