Question

Compare the value you calculated for the number of sand grains on Earth’s beaches to the number of particles in a mole. What can you conclude about the size of a mole?
The number of particles in a mole is about ____(blank) the number of grains of sand on Earth’s beaches.

Answer 1

Answer:

6.022×1023 particles are present in one mole of a substance while about 7.5 x 1018 grains of sand are present on earth's beaches.

Explanation:

Mole is used in chemistry for the calculation of mass of an atom. 6.022×1023 particles are present in one mole of a substance while about 7.5 x 1018 grains of sand are present on earth's beaches. According to this data which shows that the size of mole is greater than the number of sand grains present on Earth’s beaches because there are higher particles are present in mole as compared to sand grains. So the mole has big size.

Answer 2

Answer:

So, the number of particles in a mole is about 80,000 the number of grains of sand on Earth’s beaches.

Explanation:

The actual number sand grains on Earth's beaches isn't something clear or given. But it can be related through some logistic approximations.

Using sand grains that take up space of 1 mm, when these sand grains are laid side by side, there are about 1000 grains of sand per m, 1000000 per square m and 1000 × 1000 × 1000 per cubic m.

That is 10⁹ grains of sand per cubic meter.

An average beach has sand volume of (1.875 × 10⁷) cubic metres (from the internet)

There are over 400 beaches in the world,

Using an estimate of 400 beaches,

The number of grains of sand on Earth's beaches = 10⁹ × 400 × 1.875 × 10⁷

There are approximately (7.5 × 10¹⁸) grains of sand on all of the world's beaches

Then, Avogadro's number found that 1 mole of all particles contain

(6.022 × 10²³) particles.

So, the number of particles in a mole is about [(6.022 × 10²³)/(7.5 × 10¹⁸)]

the number of grains of sand on Earth’s beaches.

So, the division gives, (8.0 × 10⁴).

Hope this Helps!!!