Cards (8)

    • relative molecular mass is...
      the average mass of ONE MOLECULE of an ELEMENT/COMPOUND compared to 1/12th the RAM of an atom of CARBON 12
    • The carbon 12 standard is…
      The mass of all atoms are measured relative to the mass of an atom of carbon-12, which is given a value of 12,000. This is called the carbon 12 standard.
    • Relative isotopic mass
      Mass of a single isotope of an element relative to 1/12 the mass of an atom of carbon-12. This id most often derived from mass spectrometry where the mass of individual isotopes can be determined.
    • The relative atomic mass (Ar) is
      The average mass of an atom of an element relative to 1/12th the mass of an atom of carbon-12.
    • Molecule
      Two or more atoms chemically bonded together. Can be between different or the same atoms. Only non metals make molecules.
    • What’s a titration?
      A laboratory procedure where a measured volume of one solution is added from a biurette to a fixed volume of another solution that has been measured with a Pipette until the reaction is complete. The end of the reaction is usually shown by the colour change of an activator.
    • What is the colour change for methyl orange?
      Orange to yellow as the pH decreases.
    • What is the colour change of phenolphtalein?
      From pink/purple to colourless.