How many atoms in 1.50g carbon?

Question

Please explain how to do this so i can answer all of my other questions

Answer 1

First use the atomic weight or molecular weight to convert a mass into moles.

Next, use Avogadro's number to convert moles of something into atoms or molecules.

So, for this problem, set it up this way:

1.50 g C (1 mol C/12.0g C) (6.02 X 10^23 atoms C/mol C) = ___

Remember that a mole is kind of like a dozen in that a mole of anything always has the same number of atoms or molecules...

Answer 2

The most important thing to know here is that 1 mole equals 6.022 X 10^23 atoms (or molecules) of a substance, and that THAT number of atoms (or molecules) (also known as “Avogadro’s number) will equal the molecular mass, expressed as grams.

In other words;
1 mole of hydrogen = 1 gram
1 mole of carbon = 12 grams
1 mole of oxygen = 16 grams
1 mole of water (H2O) = 18 grams
etc.


Therefore, you want 1.5/12 "Avogadro number's worth"

Answer 3

7.518108401*10^22 atoms

Answer 4

1.5/12=1/8mol
6.022 x 10^23 x1/8
=7.5275 x 10^22atoms