relative formula masses and molar volumes of gases

Question 1

What is relative formula mass

Answer 1

Mr is relative formula mass, it is the mass of a molecule.

Question 2

What is the calculation for relative formula mass

Answer 2

(number of that element in the molecule x relative atomic mass) + (number of that element in the molecule x relative atomic mass) = relative formula mass

Question 3

What is relative atomic mass

Answer 3

Ar is relative atomic mass, it is the average mass of an atom of a specific element.

Question 4

What is a mole

Answer 4

A mole is an amount. Having one mole of something is having 6.022 x 10^23 of it.

Question 5

What s a mole also known as

Answer 5

A mole is also known as Avogadro’s number (or the Avogrado number of particles in a substance)

Question 6

What is significant about having 1 mole of an element

Answer 6

If you have 1 mole of an element its weight in grams will be equal to its atomic mass.

Question 7

What is the relationship between moles, mass and relative formula mass

Answer 7

Mass = Mr x moles

Question 8

At a standard temperature and pressure, what volume will one mole of any gas occupy

Answer 8

At standard temperature and pressure, one mole of any gas will occupy 24000 cm^3; also known as 24dm^3.

Question 9

What is the relationship between amount of gas, volume of gas and molar volume of gas

Answer 9

amount of gas (mol) = volume of gas (dm^3) / molar volume of gas (dm^3mol^-1)