Calculate the mass of 25,000 molecules of nitrogen gas.  (1 mole = 6.02 x 1023 molecules)

grams

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number of particles.

To calculate the moles, we use the equation:

Now 1 mole of gas weighs = 28 grams

of gas weighs = grams

Thus the mass will be grams.

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