Calculate the mass (in grams) of 7.66×1019 CCl2F2 molecules

Equate both the equations:

Gram molecular mass of the given compund:

Now, substitue the known values in the given formula:

• Molecules = 7.66×10¹⁹

• Avogadro's number = 6.022 × 10²³

• Gram molecular mass = 119 g

• Mass = ?

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c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.