Number of atoms : 1.26 x 10²³
<h3>Further explanation </h3>
The mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
0.21 moles of Al, so n = 0.21
Number of atoms :

Answer:
absorbed
Explanation:
because black absorbs the light around it
Answer:
Explanation:
To be accurate, it must be able to make measurements that are close to the actual value.
Answer:
the correct answer is proton