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C
oxidation numbers problem
what is the oxidation number of Bi in NaBiO3 -
C
important : selective school half yearly question
thats not the right answer i suggest since it is an alkene the ratio of C to H is CnH2n -
C
important: past hSC question not many ppl got it right
thanx heeps your a genius -
C
important : selective school half yearly question
the compound cumene contains only carbon and hydrogen. combustion of 71.5 g of cumene produces 235.6 g of CO2 and 64.3g of H2O. what is its molecular formula? -
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C
important: past hSC question not many ppl got it right
yeh thats right howd u get that? -
C
important: past hSC question not many ppl got it right
an element X forms both a monoxide (XO) and a dioxide (XO2). conversion of 10.00g of X0 to XO2 produces 15.33g of the dioxide. what is therelative atomic mass of X? -
C
important : mass - mass calculations past hsc question
can u show me the workin out plz -
C
important : mass - mass calculations past hsc question
when lead oxide is heated with carbon, metallic lead is formed. 2PbO (s) + C (s) ------> 2Pb (s) + CO2 (g) if 87.3g of lead oxide were mixeed with 2.62g of charcoal (carbon), what mass of metallic lead would be formed ? -
C
molar mass problem important for hsc
can any1 help .... what is the relative molar mass of C12 H22 011 to 2 decimal places with units ? the answer i get is 342.30 amu but is wrong -