QUANTITATIVE CHEMISTRY

Question 1

What is a mole?

Answer 1

Amount of matter that has the same amount of particles as all the atoms in 12 grams of carbon-12.

ITS AN SI UNIT FOR AN AMOUNT OF SUBSTANCE

Question 2

Describe the relationship between mole and Avogadro’s number.

Answer 2

Avogadro’s number (6.022 x 10^23) represents the number of particles (atoms or molecules) in one mole of a substance.

Question 3

Conceptualize the magnitude of Avogadro’s number using appropriate analogies

Answer 3

The reaction of 1 dozen tennis balls with 2 dozen table tennis balls is the same as the reaction of 1 mol of oxygen with two moles of hydrogen atoms.

Question 4

Write down Avagadros number with all the zeros.

Answer 4

602 + 21 zeros onto that.

Question 5

Describe molar mass.

Answer 5

The molar mass is the mass of 1 mole of a substance and it is measured in g.mol^-1.

Question 6

Describe the relationship between molar mass relative molecular mass and relative formula mass

Answer 6

Molar mass is the mass of one mole of a substance, while the relative molecular mass and relative formula mass are the sums of the relative atomic masses of the atoms.

Question 7

Definition of molar volume

Answer 7

1 mole of gas occupies 22.4 dm3 at 0 °C (273 K) and 1 atmosphere (101.3 kPa)