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AS Chemistry P2 Prep.
ok there is this q.... where phosphorus has a greater ionisation energy than sulfur ..and q is why? the ans is:for S one 3p orbital has paired electrons and for P 3p sub-shell is singly filled paired electrons repel .... i dont undersand it...explain plsssss -
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AS Chemistry P2 Prep.
temp-450 C pressure-200 atm catalyst- finely divided iron -
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AS Chemistry P2 Prep.
i have no idea somebody ...wanted info and i just copy pasted..... so you r going to xplain whn this topic comes/..... -
AS Chemistry P2 Prep.
The central atom is C and it is surrounded by 4 hydrogens. First find the number of electrons being shared. In this case, it is 4 from carbon and 1 from each hydrogen, totaling up to 8 electrons. Now, each bond uses 2 electrons. There are 4 bonds, and therefore no lone pairs. So CH4 has 4 bonds... -
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AS Chemistry P2 Prep.
angelgirl:) oh how do we get moles by titration? -
AS Chemistry P2 Prep.
u burn a known mass then subract how much oxygen reacted with substance and then calculate the mole of the substance to the oxygen.... like ratio by dividing it by.....if oxygen.... mass of O2/16...and the ratio thingy....right? -
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AS Chemistry P2 Prep.
by the empirical formula and the RMM divide by RMM and multiply