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VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: matt123 on November 09, 2010, 12:30:09 pm

Title: ERROR IN 2008 NEAP??? please help ..thanks :)
Post by: matt123 on November 09, 2010, 12:30:09 pm

q3a.

The grubber salt formula is

Na2s04. 10h20

they said the Molar mass = 322 ( only used 1 h20)
is this a typo?
I thought there are 10 h20's in it .. = 10X180 + the rest of the molar mass = 1942 ish
not 322? why did they only include 1 h20 ?? ... error? or am i missing something lol

Title: Re: ERROR IN 2008 NEAP??? please help ..thanks :)
Post by: JinXi on November 09, 2010, 12:32:16 pm

Na2SO4.10H20

46+32+64+180 = 322?

Why did u go 10x180? h20 has a mass of 18.

Title: Re: ERROR IN 2008 NEAP??? please help ..thanks :)
Post by: superflya on November 09, 2010, 12:33:35 pm

he added an extra 0 :P

Title: Re: ERROR IN 2008 NEAP??? please help ..thanks :)
Post by: matt123 on November 09, 2010, 12:34:23 pm

Quote from: JinXi on November 09, 2010, 12:32:16 pm

Na2SO4.10H20

46+32+64+180 = 322?

Why did u go 10x180? h20 has a mass of 18.

LOL EMBARRASSING
ROFLLLLLL I did the maths 18X10 = 180 ..
hahahahahahha massive fail .. its not 180X10
LOLLLLLLLLLLLLLL

ok kill me now hahah
so embarrassing .. haha