Question

How many molecules of `CO_2` are there in 55 grams of `CO_2`?

Answer 1

There are over `"Avogadro's Number"` carbon dioxide molecules in a 55 g mass.

Explanation:

By definition there are `6.022xx10^23` carbon dioxide molecules in a `44.0*g` mass. How do I know this? Well because we use the given number to specify molar mass, the which equates the macro world of grams and kilograms with the micro world of atoms and molecules.

So to the calculation:

`"Number of carbon dioxide molecules "=(55.0*g)/(44.0*g*mol^-1)xxN_A`, where `N_A` is a number with units `mol^-1`.