chemist chem.?

Question

The number of atoms in a mole is x. How many atoms are contained in
Q1) 4 moles of carbon atoms;
Q2) 8g of oxygen?

Answer 1

Q1) 4.0* Avogadro's number.
Q2) 0.5* Avogadro's number [ 16g oxygen per mol, 8g oxygen = 0.5 mol].
[Avogadro's number or constant is:
6.022 * 10^23 per mol].

Answer 2

One mole of any element is 6.022 x 10e23 atoms. Therefore 4 moles of Carbon will be 24.088 x 10e23 atoms.

8 grams of oxygen is .5 mole. So that's 3.011 x 10e23 atoms.