Stoichiometry

Question 1

The study of relationship of the amount of substance in a chemical reaction.

Answer 1

Stoichiometry

Question 2

The most crucial concept in chemical stoichiometry is the concept of the ________.

Answer 2

MOLE

Question 3

It is the amount of substance that contains as many elementary entities such as atoms, molecules, ions, or other particles.

Answer 3

MOLE

Question 4

1 mole = ________________

Answer 4

1 mole = 6.02 × 10²³ particles

Question 5

What is 6.02 × 10²³ particles?

Answer 5

Avogadro’s Number

Question 6

• It is the mass of one mole of any substance.

• gram per mole (g/mol.)

Answer 6

Molar Mass / Molar Weight

Question 7

m = ?

Answer 7

m = mass [grams (g)]

Question 8

n = ?

Answer 8

n = Number of Mole (mol.)

Question 9

MW = ?

Answer 9

MW = Molar Weight/Mass (g/mol.)

Question 10

The term MOLE was originally coined by the German ______________________

Answer 10

Friedrich Wilhelm Ostward

Question 11

How many particles are there in one mole?

Answer 11

6.02 × 10²³ particles

Question 12

The value of a mole (6.02 × 10²³) is known as ___________________

Answer 12

Avogadro’s Number

Question 13

• The Avogadro’s Number is named in honor of an Italian lawyer and physicist
• Who conceived the basic idea but never determined the number

Answer 13

Amadeo Avogadro

Question 14

True or False

One mole always contains the same number of particles.

Answer 14

True

Question 15

True or False

Different substances have different molar mass.

Answer 15

True