2.2 - 3.3 - Maths Skills Flashcards
What does the Avogadro constant represent?
The number of atoms per mole of the carbon-12 isotope
How to calculate the mass of 1 mole of the element?
Mass of 1 mole= relative atomic mass in grams
State Avogadro’s law
Under the same temperature and pressure one mole of any gas would occupy the same volume
Why do different gas particles occupy the same volume?
The gas particles are very spread out hence individual differences has no effect
What are the ideal ways in which gases behave?
• they are in continuous motion
• no intermolecular forces experienced
• exert pressure when they collide with each other or container
• no kinetic energy or lost in the collisions
• when temperature increases = kinetic energy of gases also increase
1 atmospheric pressure isequal to how many pascal?
101325 Pa
0°C is equal to how many kelvin?
273k
What does concentration of a solution mean?
Its the amount of solute dissolved in 1dm^3 of solvent
What does the term concentrated mean?
Large amount of solute per Dm^3 of solvent
What does the term dilute mean?
Small amount of solute per dm^3 of solvent
What are the reasons for not obtaining 100% yield?
• reaction may be at equilibrium
• the reactants may be impure
• side reactions can occur
• reactants or products may be left behind while transferring
• loss of products during separation and purification
Which type of reactions have 100% atom economy?
Addition reactions
