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So if you get tunn its alcohol?Hey guys check this out
http://wiki.answers.com/Q/How_do_you_test_a_liquid_for_alcohol?#slide=2
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So if you get tunn its alcohol?Hey guys check this out
http://wiki.answers.com/Q/How_do_you_test_a_liquid_for_alcohol?#slide=2
ThanksThis is olevel thread not IGCSE .-.
There are 4 moles of water in 72g and 4 moles of O. Mass = Moles * mr = 4 * 16 = 64how to do it?View attachment 43263
A precipitate would definitely have been seen if was was Ca+2 because it does not dissolve in excess.i think the answer shouLd be C, HOW come its B??
View attachment 43270
4 MOLES OF O? HOW?There are 4 moles of water in 72g and 4 moles of O. Mass = Moles * mr = 4 * 16 = 64
but they are not asking about excess sodium hydroxideA precipitate would definitely have been seen if was was Ca+2 because it does not dissolve in excess.
72/18 = 4 moles of water4 MOLES OF O? HOW?
and H is 2*4=8 moles ?72/18 = 4 moles of water
That's 4 moles of H2O, so O is 4 moles.
kafi iguesthey'll cut off the extra words and then read it.
how much did u exceed?
Allah aesa he ho :'(If u see the ms it says marks are given for OWN WORDS and USE OF LANGUAGE. I dont think marks would be deducted.
I forgot to write no.of words but it was under the limit
Yeahand H is 2*4=8 moles ?
industrial wastE? umm thnk wot industrial wste could hav ? iron?http://papers.xtremepapers.com/CIE/Cambridge International O Level/Chemistry (5070)/5070_s09_qp_2.pdf
A6 part d anyone? It's so weird.
K+ and H+ won't do anything with NaOH. Fe+2 gives a green ppt and Ca+2 gives white ppt.http://papers.xtremepapers.com/CIE/Cambridge International O Level/Chemistry (5070)/5070_s09_qp_2.pdf
A6 part d anyone? It's so weird.
Sea water contains water mixed with salts. Air is a mixture of gases.why C?
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