If 3.011 x 1023 molecules have a mass of 20.04 grams, what is the molar mass of this substance?

The molar mass of the substance will be 40.08 g.

Explanation:

It is given that molecules of any substance has a mass of 20.04 g.

Now, the number of moles of a substance can be calculated as,

The value of Avogadro's number is .

So, the number of moles of the substance will be,

Now, the molar mass of the substance will be,

Therefore, the molar mass of the substance will be 40.08 g.

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