Came across a qn like this: what is the chemical formula for uranium (VI) oxide?
(a) UO2
(b) UO3
(c) U2O3
(d) U2O6
If i'm not wrong the answer should be (b), y can't we accept (d) as the answer?
so u arent sure of the answer urself ?
... if me i'll write d. cause b is the emp. formula
2 be frank I wasn't sure cos i googled 4 the answer n concluded (b) should be tne answer. can someone enlighten us??? the oxidation state for uranium is +6 in (b) n (d)
Originally posted by Dixon999:2 be frank I wasn't sure cos i googled 4 the answer n concluded (b) should be tne answer. can someone enlighten us??? the oxidation state for uranium is +6 in (b) n (d)
i will still choose D as emp.forum =/= chemical forumla.
Originally posted by yiha093:i will still choose D as emp.forum =/= chemical forumla.
We are not expected to know the actual formula of Uranium (VI) Oxide (it's actually UO3).
They simply want us to understand that
Oxygen = -2
Uranium = +6
Simply chemistry rules of Cations and Anions apply (simplifying the numbers), meaning a simple compound like Uranium (VI) Oxide (consisting of only two elements) at O' Level standard will not have a chemical formula like U10O30 or U30O90, which would be simply stupid.
Choosing U2O6, imho, is being a smart alec, which is never advised especially for examinations.
Originally posted by UltimaOnline:Ionic compounds have no molecules, hence the only valid chemical formula is its empirical formula.
So in this case, empircal formula = chemical forumla.
(For covalent compounds, you can have molecular formula, empirical formula, condensed formula, displayed structural formula, etc.)
icic... kk will take note.