Question

The amount of a substance is measured in moles (the SI unit). The mass of one mole of a substance in grams is numerically equal to the relative formula mass of the substance. One mole of a substance contains the same number of the stated particles, atoms or ions as one mole of any other substance. The number of atoms, molecules or ions in a mole of a given substance is the Avogadro constant. The value of the Avogadro constant is

6.02 × 1023 per mole.

Complete the table. Use the periodic table to help you.

Substance Mass of substance in grams Amount in moles Number of particles
Helium 18.12 × 1023
Chlorine (Cl) 14.2
Methane 4
Sulfuric acid 4.905

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

The number 6.02214076×1023 (the Avogadro number) was chosen so that the mass of one mole of a chemical compound in grams is numerically equal, for most practical purposes, to the average mass of one molecule of the compound in daltons.

Unit system: SI base unit

SI base units: 1000 mmol