Chemistry Terms Ch 3

Question 0

Avogadro number. (N)

Answer 0

The number of atoms in exactly 12g of carbon-12; a value of 6.002x10 ^23

6.022x10 ^23

Question 1

Molecular mass

Molecular weight

Answer 1

Is the sum of the Atomic masses, in atomic mass units,(u) of all the Atoms in the formula of the compound.

The atomic masses for all of the atoms in compound, all added together
N2O5. Would be. ( 2x14.01)+(5x16.00)=108.02 u

Question 2

Mole (mol)

Answer 2

Is the amount of a substance containing the same number of particles as exactly 12g of
carbon-12

Like a doz eggs are 12
a MOLE is. 6.022x 10 ^23

Question 3

Molar Mass

Answer 3

The molar mass if any mole of an element is the atomic mass of the element expresses in grams.

The mass in grams of one mole of that element

Question 4

Molar Mass of a compound

Answer 4

The molecular mass of that compound expressed in grams.

The mass in grams of one mile of the substance

Question 5

Formula for moles. In number of moles

Answer 5

Molar Mass

1. Mole of substances = no.of particles of that substance as well as the molar mass in grams.

Question 6

What is the link between mass and number of particles

Answer 6

Mole

Question 7

What unit is used in expressing molar mass?

Answer 7

Grams

Question 8

What’s the number Of molecules in one mole

Answer 8

6.022×10 to the 23rd