Terms in this set (10) Avogadro's number. One mole contains 6 x 10 to the power 23 particles. How to find number of particles. Number of given moles x 6.0x10²³ particles/mol. The mass of one mole of any pure substance (compound or element) Mole is. IN this video you will learn about the basic calculation mean how to get 1mau equal to 1.66x10-24g.also learn the definition related to this concept.these ca. However, the only practical use for N A is to have a more convenient way of expressing the huge numbers of the tiny particles such as atoms or molecules that we deal with in chemistry. Avogadro's number is a collective number, just like a dozen. Students can think of 6.02 × 10 23 as the 'chemist's dozen'. Avogadro's number. Avogadro's number is the number of particles in one mole of any substance. Its numerical value is 6.02225 × 1023. One mole of oxygen gas contains 6.02 × 1023molecules of oxygen, while one mole of sodium chloride contains 6.02 × 1023sodium ions and 6.02 × 1023 chloride ions. Avogadro's number, or Avogadro's constant, is the number of particles found in one mole of a substance. It is the number of atoms in exactly 12 grams of carbon -12. This experimentally determined value is approximately 6.0221 x 10 23 particles per mole.

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• An amount of substance containing 6.02 × 1023 particles is called a mole (often abbreviated to mol).
• 6.02 × 1023 is called the Avogadro Constant or Avogadro's Number.
The following diagram shows how to convert between Mass, Mole and Number of particles. Scroll down the page for more examples and solutions.

Example:

One mole of carbon contains 6.02 × 1023 of carbon atoms.
One mole of oxygen contains 6.02 × 1023 of oxygen molecules

Molar mass
• The mass of one mole of a substance is called the molar mass.
• The molar mass of a substance is equal to its relative formula mass in grams.
Example:
What is the mass of 1 mole of carbon?

Solution:
The mass of 1 mole of carbon = relative formula mass of carbon = 12 grams

Example:
What is the molar mass of calcium carbonate (CaCO3)?

Solution:

Step 1: Look up the relative atomic masses of the atoms from the periodic table.
Relative atomic mass (rounded to the nearest whole number):
Ca = 40, C = 12, O = 16

Step 2: Calculate the relative formula mass.
Calcium carbonate (CaCO3) contains one calcium atom, one carbon atom and three oxygen atoms.
Relative formula mass = 40 + 12 + (3 × 16) = 100

Step 3: Express the relative formula mass in grams per mole.
The molar mass of ethanol is 100 g/mol Example:
What is the molar mass of ethanol (C2H5OH)?

Solution:
Step 1: Look up the relative atomic masses of the atoms from the periodic table.
Relative atomic mass (rounded to the nearest whole number):
H = 1, C = 12, O = 16

Step 2: Calculate the relative formula mass.
Ethanol (C2H5OH) contains two carbon atoms, six hydrogen atoms and one oxygen atom.
Relative formula mass = (2 × 12) + (6 × 1) + 16 = 46

Step 3: Express the relative formula mass in grams per mole.
The molar mass of ethanol is 46 g/mol

Introduction to Moles A mole is like a dozen. It is a name for a specific number of things. There are 12 things in a dozen, and 602 hexillion things in a mole.
What are moles and why they are important?
How to abbreviate the mole number (Avogadro's number) using scientific notation, and compare to see how giant this number is.
• Show Step-by-step Solutions
Converting Between Moles, Atoms, and Molecules
How to convert between moles and the number of atoms or molecules using both a common sense approach, and a standard conversion factor method?
How to round our answers with scientific notation and significant figures?
Example:

## Avogadro's Constant Is Defined As The Number Of Particles In

How many atoms in 5.5 moles?
How many moles is 4.6 × 1024 sulfur atoms? Converting between Moles, Atoms, and Molecules (Part 2)
More practice problems, converting between moles, atoms, and molecules.
Example:
How many molecules is 0.63 moles of molecules?
How many moles is 3.9 × 1020 Magnesium atoms?

## How Was Avogadro's Number Found

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The mole and Avogadro's number Atoms, compounds, and ions Chemistry
Avogadro's Number, the Mole and How to Use the Mole