Posts by bex

Total # Posts: 104

chem
could anyone tell me why the molecular formula of agas is not always the same as the empirical formula tnx It may be a dimer or a trimer. For example, CH is the empirical formula for acetylene but the molecular formula is HC(triple bond)CH or C2H2.

chem
hi can anyone help how do i determine the molecular formular of the oxide of arsenic in its in its gaseous state the answer i got was 17.8 gl -1 for the density, which law do i use is it boyles law or charles law thanks A mol of a gas occupies 22.4 L at STP. If it is 17.8 g/L ...

the big idea of energy
dont get it :S

acids and alkalis
- lemons contain citric acid which make them tast sour -Soft drinks contain Phosphoric acid to give thm a shrper tast and to prevent bacteria multiplying at a quicker rate -fruit jucies contain Malic acid ,,, which is found in apples and cherries dunno if this is any help but ...

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