How do you calculate the number of molecules?

Calculate the number of atoms or molecules in the following please?

  • N2 + 3h2 --> 2NH3 The number of moles of Ammonia and Hydrogen gas in 3.75g of ammonia (NH3)? also.. The number of moles of nitrate in 6.79g of nitric acid.

  • Answer:

    Use mole conversions. Multiply by avagadros number (6.022 x 10^23)

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