Equations/Formulas

Question 1

What is the equation for relative atomic mass?

Answer 1

Relative atomic mass= total mass of all atoms of an element / total number of atoms of that element

Question 2

How do you calculate the % mass of an element in a compound?

Answer 2

% mass of element in a compound= Ar x number of atoms of that element / Mr of the compound x100

Question 3

What is the equation for moles?

Answer 3

Moles = mass / Mr

Question 4

How do you calculate concentration?(mass)

Answer 4

Concentration = Mass / Volume

Question 5

How do you calculate concentration? (moles)

Answer 5

Concentration = Moles / Volume

Question 6

What is the equation for percentage yeild?

Answer 6

Percentage yield = Actual yield / Theoretical yield x 100

Question 7

How do you calculate % atom economy?

Answer 7

% Atom economy = Mr of desired products / Mr of total products x 100

Question 8

How do you calculate the volume of a gas?

Answer 8

Volume of gas = Moles x 24