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[Chem] 2008 chem mc

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2008 chem mc

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what are the answer????please explain.
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32 H2O is a liquid at room temp
2 refer to the periodic table
10 calculate the number of ions in each substances
    eg A Fe2(SO4)3 <- 5 moles x 5 ions x L(Avogadro's constant) = 25L
37 temp rise in 2M > temp rise in 1M (although volume diff, temp rise still the same)

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Q2...just search in the periodic table.....
Q10...write the chemical formula of the things...then count the number of ions...
Q37...really hard to explain...when each HCl and NaOH react...a quantity of energy is released...and the energy required to raise the temperature is given by E=mc△T...therefore...w=x<y=z...
Q32...I think you forget that H2O is liquid in rtp...therefore...you should calculate the no. of moles of CO2, N2 and O2 formed only

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what is the answer of question 32

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32. A

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回覆 #4 angus1993 的帖子

A

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the ans is A

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