What would be the mass of 4.5xx10^26 carbon atoms?

2 Answers
anor277
May 18, 2017

Well, the mass of 6.022xx10^23 carbon atoms is 12.011*g.

Explanation:

How do we know this? Well, 6.022xx10^23 individual ""^12C atoms has a mass of 12.00*g precisely, and we use this number as a bridge between the sub-micro world of atoms and molecules to the macro world of grams, and litres, that which we can quantitatively measure.

And so.........

"Mass of carbon"=(4.5xx10^26*"carbon atoms"xx12.011*g)/(6.022xx10^23*"carbon atoms")

~=9*kg carbon...........

MeneerNask
May 18, 2017

We will convert to mols.

Explanation:

1 mol of C has 6.02xx10^23 atoms (Avogadro's number).

So the number you mention contains:

(4.5xx10^26)/(6.02xx10^23)=0.748xx10^3mol

Since 1 mol of C has a mass of 12.01g

Total mass =12.01xx0.748xx10^3=8.98xx10^3g~~9.0kg

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