C4: Chemical Calculations Flashcards
1
Q
What is the equation for the number of moles?
A
Mass(g) ➗Mr
2
Q
How to find the percentage yield?
A
Actual mass of product produced ➗ maximum theoretical mass of product possible ✖️100%
3
Q
How to find the percentage atom economy?
A
Relative formula mass of the desired product from equation ➗ sum of the relative formula mass of the reactants from equation ✖️ 100%
4
Q
What is titrations used for?
A
To measure what volumes of acid and alkali react completely together.
5
Q
How to find the number of moles of gas?
A
Volume of gas (dm3) ➗ 24dm3
OR
Volume of gas (cm3) ➗ 24,000cm3