Ch 3 Flashcards
1
Q
Percent Composition
A
Requires chemical formula
%element= (number of atoms of that element)(atomic weight of element) over formula weight of compound X 100%
2
Q
Avogadro’s Number
A
6.02 X 10^23
3
Q
Molar Mass
A
Equals formula weight
4
Q
Grams ➡️ Moles
A
Use molar mass
5
Q
Moles ➡️ Formula Units
A
Use Avogrados number
6
Q
Given:
Mass % elements
A
Convert to Grams of each element
7
Q
From grams of each element use _____ to find _____
A
Atomic weights
Moles of each element
8
Q
After finding moles of each element, find empirical formula by
A
Calculating mol ratio
9
Q
Grams Reactant ➡️ _____ Reactant ➡️ Moles _____ ➡️ _____ Product
A
Moles
Product
Grams
10
Q
Limiting Reactant
A
Element that is completely used first
I.e. Bread
11
Q
Formula Weight
A
The sum of the atomic weights of each atom in its chemical formula
