Chemistry c3 science revision OCR

  1. How do you calculate the amount of moles in an element?
    The atomic number is the same amount of moles in an element.
  2. How much does a mole of hydrogen gas (H2)weigh?
    • (atomic number)
    • 2g
  3. How much does a mole of oxygen gas (O2) weigh?
    • (Atomic number)
    • 16g
  4. What is Avogadro's number?
    6.022 x 1023
  5. How to calculate moles?
    • (Mr moles with a mass on his head)
    • Moles = Mass/Mr
  6. What is a exothermic reaction?
    The reaction looses energy and heat.
  7. What is a endothermic reaction?
    The reactions gains energy and heat.
  8. What does (aq) stand for on a element?
    Aqueous solution.
  9. What does (S), (l) and (g) stand for?
    • Solid
    • Liquid
    • Gas
Author
sixtynine
ID
331354
Card Set
Chemistry c3 science revision OCR
Description
Revision for chemistry C3 OCR
Updated