What is mole of substance with example?
A mole corresponds to the mass of a substance that contains 6.023 x 1023 particles of the substance. The mole is the SI unit for the amount of a substance. Its symbol is mol. By definition: 1 mol of carbon-12 has a mass of 12 grams and contains 6.022140857 x 1023 of carbon atoms (to 10 significant figures). Examples.
What is the number that represents 1 mole?
Avogadro’s number is the number of units in one mole of a substance, or 6.02214076 × 1023. This number is also called the Avogadro constant.
What is one mole of a substance?
One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). The number 6.022 × 10²³ is known as Avogadro’s number or Avogadro’s constant. The concept of the mole can be used to convert between mass and number of particles of any substance or as it is called matter.
What is mole in human body?
Moles occur when cells in your skin grow in a cluster instead of being spread throughout the skin. Most moles are made of cells called melanocytes, which make the pigment that gives your skin its natural color.
What is the mass of one mole of oxygen?
Solution — Mass of one mole of oxygen molecule (O2) = molecular mass of oxygen molecule (O2) in gram = 32 g. Mass of a single oxygen molecule = 32/1 × 1024 = 3.2 × 10-23g.
Why is mole concept important?
Explanation: THE mole is important because it allows chemist to work with a subatomic world with macro world units and amount. Atoms molecules and formula units are very small and very difficult to work with usually. However the mole allows a chemist to work with amount large enough to use.
What is relationship between mole Avogadro number and mass?
Avogadro’s number is a proportion that relates molar mass on an atomic scale to physical mass on a human scale. Avogadro’s number is defined as the number of elementary particles (molecules, atoms, compounds, etc.) per mole of a substance. It is equal to 6.022×1023 mol-1 and is expressed as the symbol NA.
What is the value of 1 mole?
The mole, abbreviated mol, is an SI unit which measures the number of particles in a specific substance. One mole is equal to 6.02214179×10^23 atoms, or other elementary units such as molecules.
Which moles are lucky?
Moles on the chest are extremely common and indicate good luck. They signify ambition and you can expect great things to happen in your life. If you plan ahead, you will surely win the race.
Which mole is lucky for male?
A mole on the back of your thigh is always auspicious for both men and women. Good fortune is predicted for these people. Anyone who loves to travel should check to see if they have a mole close to their ankle. It is told that a mold close to the ankle will bring all kinds of good luck while travelling.
Which mole indicates success?
Moles on the side of the nose, near the nostrils or hidden, indicates someone who is good with money, especially at protecting their bank account. Having a mole on the chin means tenacity, determination and stubbornness. It can lead to success or failure depending on how you direct this in your life.