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A student determined the concentration of a hydrochloric acid solution by titration with 25.0 cm3 portions of a 0.05 M primary standard solution of anhydrous sodium carbonate. The portions of sodium carbonate solution were measured into a conical flask us
(2012)
Ethene gas can be prepared from ethanol in a school laboratory.
The relative molecular mass of a volatile liquid can be found by means of a procedure involving the use of either apparatus A or apparatus B shown below
State the number of (i) sub-levels (subshells), (ii) orbitals, occupied by electrons in an argon atom in its ground state.
Write the electron configuration (s, p) of an oxygen atom showing the arrangement of electrons in atomic orbitals
