The value of the mole is equal to the number of atoms in exactly 12 grams of pure carbon-12 (12 g C = 1 mol C atoms = 6.022 × 10 23 C atoms). Here some of the language of the current SI definition is incorporated.
What are the two things a mole is equal to?
A mole represents two things: 1. It represents a definite amount of the substance i.e. an amount of substance equal to its gram atomic mass or gram molecular mass .
What is the 1 mole is equal to?
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.
Is a mole equal to an atom?
The mole, abbreviated mol, is an SI unit which measures the number of particles in a specific substance. One mole is equal to 6.02214179×1023 atoms , or other elementary units such as molecules.
What is the mole equation?
Worked Example: moles = mass ÷ molar mass (n=m/M)
What is the formula for moles to grams?
Moles to grams example problem
Solution: Find out the molar mass of the substance (hint: you can use Molar mass of the substance alone to calculate molar mass). The molar mass of KClO3 is 122.548 g/mol. Multiply the given number of moles (2.50 mol) by the molar mass (122.548 g/mol) to get the grams.
How big would a mole of basketballs be?
Activity: How big is a Mole? A mole is 6.02 x 10 23 of anything. A mole of donuts is 6.02 x 10 23 donuts, and a mole of basketballs is 6.02 x 10 23 basketballs—and that’s a lot of basketballs! A mole of basketballs would just about fit into a ball bag the size of the Earth!
What are 3 things that a mole is equal to?
A mole is defined as 6.02214076 × 10 23 of some chemical unit , be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
What is a mole Class 9?
The mole is the amount of substance that contains the same number of particles (atoms/ ions/ molecules/ formula units etc.) as there are atoms in exactly 12 g of carbon-12. • Mass of 1 mole of a substance is called its molar mass.
Which statements best describes a mole?
Therefore, the statement that best describes a mole is c . It is used for directly comparing the amounts of substances.
How much is a mole of money?
1 Expert Answer
1 mole of pennies = 6.02×10 23 pennies (that’s a lot of pennies). How many dollars is that? Now, how many years would this amount last if you spent it at a rate of $1 billion a second? So, 1 billion dollars is 1×10 9 dollars.
Is a mole equal to a gram?
A mole is a certain number of molecules, atoms, electrons, etc. ... This is correctly defined as a gram mole, though SI units officially designate this as a mole. Alternatively, a (kilogram mole) is equal to gram moles , and therefore can be thought of as having times 6.022 140 × 10 23 particles.
What is mole Mexican?
The term “mole” stems from the Nahuatl world “molli,” which means “sauce” or “concoction .” Mole comes from a family of sauces prepared throughout the Oaxaca and Puebla regions of Mexico and is characterized by a complex, layered flavor derived from intricate blends of dried chiles, spices, fruits, and seasonings.
What is the numerical value of mole?
One mole contains exactly 6.022 140 76 x 1023 elementary entities. This number is the fixed numerical value of the Avogadro constant, NA, when expressed in the unit mol–1 and is called the Avogadro number.
What is formula for mass?
Mass is always constant for a body. One way to calculate mass: Mass = volume × density . Weight is the measure of the gravitational force acting on a mass.
Why is mole concept important?
Significance of Mole: ... atoms and molecules are very small and the mole concept allows us to count atoms and molecules by weighing macroscopic amounts of material .
