Question

Calculate the number of moles from the given number of particles. Express your answer to the correct number of significant figures.
There are moles in 1.26 × 1024 particles.

Answer 1

Answer: 2.09moles

Explanation:

One mole of an element contained 6.02*10^23 Particle

Xmol will contain 1.26*10^24 Particles

Xmol = 1.26*10^24/6.02*10^23

Xmol = 2.09moles

Answer 2

Answer:

The answer is 2.09 moles

Explanation:

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023 * 10²³ particles per mole. The Avogadro number applies to any substance.

Then you can apply a rule of three as follows: if 6.023*10²³ particles are contained in 1 mole, 1.26*10²⁴ particles in how many moles are they?

$moles=\frac{1.26*10^{24} particles*1 mole}{6.023*10^{24} particles}$

moles= 2.09