How many molecules are present in a $20*g$ mass of $"carbon dioxide"$ ?

Question

6703 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-09-27T07:33:59

Approx. $3.0xx10^23" carbon dioxide molecules"$

$"Avogadro's number"$ $=$ $6.022xx10^23*mol^-1$ .

Now, in $44*g$ of gas there are $"Avogadro's number"$ of molecules by definition.

And thus $6.022xx10^23*mol^-1$ $xx$ $(20*g)/(44.0*g*mol^-1)$ $~=$ $3.0xx10^23" carbon dioxide molecules"$ . You can make a better estimate.

How many molecules are present in a 20*g20*g mass of "carbon dioxide""carbon dioxide"?