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Chemistry AS Help Needed !!

Help !!!!!!!!!! Help !!!!!!!!!!!
Which of the following contains one mole of neutrons?
A) 1 g of 1 1 H
B) 1 g of 12 6 C
C) 2 g of 24 12 Mg
D) 2 g of 22 10 Ne

Bold letters mean Relative Mass
Underline mean Atomic number
A
Edit: sorry no it's not!
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(edited 8 years ago)
C

Moles of Mg = 2/24 =1/12

12 neutrons in each Mg atom

Therefore there are 12 x 1/12 moles of neutrons = 1 mole of neutrons


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Reply 3
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NNB_Herath
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Original post by 1lilypad1
C

Moles of Mg = 2/24 =1/12

12 neutrons in each Mg atom

Therefore there are 12 x 1/12 moles of neutrons = 1 mole of neutrons


Posted from TSR Mobile


You are correct and the REAL ANSWER IN MARK SCHEME IS C
Reply 4
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NNB_Herath
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Original post by 1lilypad1
C

Moles of Mg = 2/24 =1/12

12 neutrons in each Mg atom

Therefore there are 12 x 1/12 moles of neutrons = 1 mole of neutrons


Posted from TSR Mobile


so...
D is also closer to 1 right?
It is 1.09090909
Say ??
Original post by NNB_Herath
so...
D is also closer to 1 right?
It is 1.09090909
Say ??


D is close to 1 I suppose but it isn't actually 1. But C is correct no?


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Reply 6
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NNB_Herath
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Original post by 1lilypad1
D is close to 1 I suppose but it isn't actually 1. But C is correct no?


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Yes C is correct ..
Thanks bro....

One more question

Which of the following compounds has the greatest ionic character?
A) Caesium fluoride
B) Caesium iodide
C) Potassium fluoride
D) Potassium iodide
Original post by NNB_Herath
Yes C is correct ..
Thanks bro....

One more question

Which of the following compounds has the greatest ionic character?
A) Caesium fluoride
B) Caesium iodide
C) Potassium fluoride
D) Potassium iodide


It will be the one where the two ions have the greatest difference in electronegativity. Fluorine is the most electronegative element so it will be A or C, but I'm not sure which of Cs or K is less electronegative.
Reply 8
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NNB_Herath
OP
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Original post by 1lilypad1
It will be the one where the two ions have the greatest difference in electronegativity. Fluorine is the most electronegative element so it will be A or C, but I'm not sure which of Cs or K is less electronegative.


but Fluorine is more electronegative than Iodine right?

Edit : OK OK ...i understood...

The actual answer is A
(edited 8 years ago)

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