Calculation Flashcards
(21 cards)
Concentration= ?
Concentration= moles/ volume
Mass= ?
Mass = Mr x mole
What is meant by the Ar
It is the relative atomic mass of the compound/ element.
Or total number of proton and neutron
What does the Avogadro’s law state?
at constant temperature and pressure, the volume of a gas is directly proportional to the number of moles of gas present.
What is the molar gas volume
-the volume that one mole of gas occupies
–> the volume that 1 mol of particle takes up (dm^3)
What number is the molar volume
24 dm^3
How many cm is in a dm
10 cm = 1 dm
Hany many cm^3 is in a dm^3
1000 cm^3 = 1 dm^3
What is the Mr of water (H2O)
16+2 =18
What is the Mr of butane
C4H10
12*4 + 10 = 58
What is the Mr of sodium chloride
23+35 = 58
What is isotopes?
-same proton number
-different neutron number
What is the percentage abundance
The proportion of a particular isotopes of an element
Why do you use mole?
To get exactly the number of particle in a solution for a complete reaction
What number is the Avogadro constant
the number of 1 mole
6.02 x 10^23
What is a limiting factor?
A compound in scarcity for a reaction
What is the theoretical yield
the value calculated from a equation and what you expect if the reaction was perfect and no reactant is lost
What is an actual yield?
The value you got from a experiment.
Will be less than theoretical yield
Percentage yield= ?
actual yield / theoretical yield x 100
Volume = ?
Volume = 24 x moles
What is an empirical formular
the simplest ratio of a chemical formular
