Chemistry
22.08.2020 07:31
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The atomic number of Neon is 10. The atomic number of Calcium is 20. Compared with

The atomic number of Neon is 10. The atomic number of Calcium is 20. Compared with a mole of neon, a mole of calcium contains
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mayaleila
mayaleila
4,5(15 marks)

Comparing 1 mole of Neon to 1 mole of calcium, both substances contains  

6.0221 x 10²³  atoms.

The atomic number of neon is 10 and the atomic number of calcium is 20.

The atomic number of an atom is the number of proton of an atom.

1 mole of Neon can be represented as follows

Ne

1 mole of Calcium  can be represented as follows:

Ca

Avogadro's number, or Avogadro's constant, is the number of particles found in one mole of a substance.

This experimentally determined value is approximately 6.0221 x 10²³ particles per mole.

This means 1 mole of any substance contain 6.0221 x 10²³  atoms.

Comparing 1 mole of Neon to 1 mole of calcium, both substances contains  

6.0221 x 10²³  atoms.

learn more on atomic number : link

SKKP2472
SKKP2472
4,4(33 marks)

an equal number of atoms

Explanation:

One mole of a substance contains the Avogadro's number of elementary entities (Atoms, molecules,  ion, etc).

Hence, one mole of calcium and one  mole of neon will contain exactly the same number of atoms which is 6.02 *10^23 atoms. This is known as the Avogadro's number.

sahaitong2552
sahaitong2552
4,6(47 marks)

Hi there!

\large\boxed{3.203 *  10^{22} atoms}

We can use the following conversions to solve:

Total mass --> amount of mols --> amount of atoms (Avogadro's number)

Begin by calculating the amount of boron trifluoride in 3.61 grams:

3.61 g * (1 mol BF₃ / 67.8 g) ≈ 0.0532 mol BF₃

Use avogadro's number to convert:

0.0532 mol * 6.02× 10²³atoms / 1 mol = 3.203 × 10²² atoms

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