Qualification > Queries
ANY DOUBTS HERE!!!
nid404:
In 6 hours
ruby92:
w02
3.(from the data booklet) Al has a 1st I.E. of 577 and a 2nd I.E. of 1820
so the total i.e. when forming an ion with a 2+ charge is 577+1820=2397
(also from data booklet) Co has a 1st I.E. of 757 and 2nd I.E. of 1640
so the total energy to form a 2+ charge is also 2397
therefore the answer is A
w06
i dont get this ??? :(
Amr Fouad:
--- Quote from: Sue T on April 11, 2010, 11:03:53 am ---i have some more chem questions :
w 02
3) Use of the Data Booklet is relevant to this question.
In the gas phase, aluminium and a transition element require the same amount of energy to form
one mole of an ion with a 2+ charge.
What is the transition element?
A Co
B Cr
C Cu
D Ni
the other 2 are attached -i couldnt copy paste
mj06
2 A sample of chlorine containing isotopes of mass numbers 35 and 37 was analysed in a
mass-spectrometer.
How many peaks corresponding to Cl2+ were recorded?
A 2
B 3
C 4
D 5
--- End quote ---
mj 2006:
answer is B (3)
u have a 3 types of chlorine molecules
(35,35)
(35,37)
(37,37)
i.e one chlorine atom with 35,other with 37, etc..
ruby92:
--- Quote from: Amr Fouad on April 11, 2010, 12:55:19 pm ---mj 2006:
answer is B (3)
u have a 3 types of chlorine molecules
(35,35)
(35,37)
(37,37)
i.e one chlorine atom with 35,other with 37, etc..
--- End quote ---
could u explain this in more detain please ??? ???
nid404:
--- Quote from: ruby92 on April 11, 2010, 12:46:32 pm ---w02
3.(from the data booklet) Al has a 1st I.E. of 577 and a 2nd I.E. of 1820
so the total i.e. when forming an ion with a 2+ charge is 577+1820=2397
(also from data booklet) Co has a 1st I.E. of 757 and 2nd I.E. of 1640
so the total energy to form a 2+ charge is also 2397
therefore the answer is A
w06
i dont get this ??? :(
--- End quote ---
Yup, that's how it is for the first one...
nov 06..which q?
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