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The molar mass is the mass of one mole of substace.

So, the molar mass is calculate by the formula:

molar mass = mass in grams / number of moles

Then, first you have to calculate the number of moles, using Avogadro's number:

number of moles = 3.011 * 10^ 23 / 6.022 * 10 ^ 23 = 0.5 moles

=> molar mass = 20.04 grams / 0.5 moles = 40.08 g / mol

Answer: 40.08 g / mol
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Answer:

The molar mass of the substance will be 40.08 g.

Explanation:

It is given that [tex]3.011\times 10^{23}[/tex] molecules of any substance has a mass of 20.04 g.

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

[tex]n=\dfrac{\texttt{Number of molecules}}{\texttt{Avogadro's number}}[/tex]

The value of Avogadro's number is [tex]6.022\times 10^{23}[/tex].

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

[tex]n=\dfrac{3.011\times 10^{23}}{6.022\times 10^{23}}\\n=0.5\texttt{ mol}[/tex]

Now, the molar mass of the substance will be,

[tex]n=\dfrac{\texttt{Given mass}}{\texttt{Molar mass}}\\0.5=\dfrac{20.04}{M}\\M=40.08 \texttt{ g}[/tex]

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

For more details, refer the link:

https://brainly.com/question/20928252?referrer=searchResults

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