Calculations (How much?) Flashcards
1
Q
Rate of reaction equation
A
Change in amount of product or reactant / Time
2
Q
What is an isotope?
A
An atom of the same element but with different numbers of neutrons
3
Q
Are there any changes in chemical properties of isotopes?
A
No, because their reactions depend on their electronic structure which is the same
4
Q
Are there any changes in physical properties of isotopes?
A
Yes
- Different density
- Mass
- They may or may not be radioactive
5
Q
How do you calculate Relative Atomic Mass (RAM) of different isotopes?
A
You need the mass and the percentage.
((Mass x %) + (Mass x %)) /100
6
Q
What is 1 mole?
A
The RAM or RFM expressed in grams
7
Q
What is the percentage by mass?
A
(RAM of element x number of atoms /
RFM of whole compound ) x100
