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help with question 11 please. http://www.xtremepapers.com/papers/...d AS Level/Chemistry (9701)/9701_w06_qp_1.pdf
Can someone pls answer this? second time I'm posting.
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help with question 11 please. http://www.xtremepapers.com/papers/...d AS Level/Chemistry (9701)/9701_w06_qp_1.pdf
Can someone pls answer this? second time I'm posting.
umm but it sayd use oxidation numbers for 13.so im sure there is a way other than trial n erroranswer for 8 is D
atomisation energy+first ionisation energy+ second ionisation energy + enthalphy change of hydration
177+590+1150-1565=352
answer fo 13 is B
have to use trial and error method, that is try putting all options
The standard enthalpy changes of formation of iron(II) oxide, FeO(s), and aluminium oxide,
Al2O3(s), are –266kJmol–1 and –1676kJmol–1 respectively.
What is the enthalpy change under standard conditions for the following reaction?
3FeO(s) + 2Al(s) 3Fe(s) + Al 2O3(s)
A +878kJ B –878kJ C –1942kJ D –2474kJ
i get the opposite charges alwayss..... how do i get it right?
Hey guys... Is there anyone willing to come online and do a past paper with me? I haven't done any chem all year long and I can't seem to answer shit! Freaking out here >.<
What is a dimer?
2 molecules of the same compound. Eg: Al3Cl6 is a dimer of AlCl3
Yesyou really confirm...???
waoo.. i knew from ages that al2cl6 is a dimer.. but never knew why...
yah but hw did u do it?I got B. Is that the correct answer?
The standard enthalpy changes of formation of iron(II) oxide, FeO(s), and aluminium oxide,
Al2O3(s), are –266kJmol–1 and –1676kJmol–1 respectively.
What is the enthalpy change under standard conditions for the following reaction?
3FeO(s) + 2Al(s) 3Fe(s) + Al 2O3(s)
A +878kJ B –878kJ C –1942kJ D –2474kJ
i get the opposite charges alwayss..... how do i get it right?
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