Amount Of Substance Flashcards
What is the symbol for amount of substance
N
What is the unit used to measure amount of substance
Moles
Wha does avagadros constant represent
The number of atoms per mole of carbon-12
How to calculate the mass of 1 mole of the element
Mass of one mole = relative atomic mass in grams
How to calculate moles when mass and molar mass are given
Moles= mass / molar mass
State avagadros law
Under the same temperature and pressure, one mole of any gas would occupy the same volume
Define molar gas volume
The volume per mole of gas molecules
Why does different gas particles occupy the same volume
The gas particles are very spread out, hence individual differences has no effect
How much volume does a gas occupy at room temp and pressure
24 dm3 or 24000cm3
How to calculate moles when gas volume is given
Moles = volume/ 24
What are the ideal ways gasses behave
-they are in continuous motion
-no intermolecular forces experienced
-no kinetic energy is lost in collisions
Exert pressure when they collide with each other or container
-when temperature increases kinetic energy of gasses also increase
Write down the ideal gas equation
pV= nRT
Pressure x volume = number of moles x gas constant x temperature
1 atmospheric pressure is equal to how many pascal
1 atm = 101325 Pa
0 degrees C is equal to how many kelvin
273K
How do you calculate moles when concentration and volume are given
Moles = concentration x volume
