Chemistry - Quantitive chemistry Flashcards
1
Q
What does it mean if the mass of the products is higher than the mass of the reactants.
A
Implies there is a gaseous reactant.
2
Q
What does it mean if the mass of the products is lower than the mass of the reactants.
A
Implies there is a gaseous product.
3
Q
What is a relative formula mass and how is it presented.
A
Percentage mass of an element in a compound , Mr
4
Q
What is a relative atomic mass and how is it presented
A
The larger number found on the periodic table.
5
Q
What is Avogadro’s constant
A
6.02 x 10to the power of 23
6
Q
Formula relating moles , mass and mr
A
moles=mass(g)/mr
7
Q
Formula for atom economy
A
(mr of desired product/mr of total product) x 100
