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Chem doubts

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Saladin:

--- Quote from: ima_shah2002 on April 18, 2010, 02:22:34 pm ---thanks.............yea that makes sense so yes it will more easily dissociate..........however u cant check this wid indicator can u ...............to deternmne its strenght

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Yes, that reactions with this substance will simply be more vigorous.

The SMA:
hi  :) can someone explain to me what is permanent dipole, induced dipole interaction please? and there's one more, dipole-dipole interaction, if i'm not mistaken. can someone explain the differences too? i'm so confused when it comes to this T.T

tmisterr:

--- Quote from: notty_me on April 18, 2010, 10:08:06 am ---
ya, sure ill sent them as soon as i scan dem 4 u :)

nd 4 Q 31, how do we know if the bars represent isotopes or atoms ????????
6 The density of ice is 1.00 g cm–3.

cud u also xplain this Q ......

Q>What is the volume of steam produced when 1.00 cm3 of ice is heated to 323 °C (596 K) at a
pressure of one atmosphere (101 kPa)?

[1 mol of a gas occupies 24.0 dm3 at 25 °C (298 K) and one atmosphere.]
A. 0.267 dm3  B. 1.33 dm3  C. 2.67 dm3   D. 48.0 dm3


thanx sooo much for da help, By the way all ur answers r riteeee!!!






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hey, sorry for the late reply, been a bit busy. nid already answered this question for you :). But for question 31 i don't know how to explain, it's just a matter of observing the question let me give a try. from the graph, the masses of each bar increasing by 32.1. As you know, the Ar of sulphur is 32.1 (one mole of sulphur atoms). If two sulphur atoms are to covalently bond forming a diatomic molecule, then you add another 32.1 to get the Mr of a diatomic sulphur molecule S2 (64.2) and you keep of adding till you get to the octa-atomic S8 which has an Mr of 256.8. so each bar is representing a different molecule(not atom), the first is mono-atomic the second diatomic the third tri-atomic the fourth tetra-atomic....u get the point, so they cannot be isotopes.

Thanks, much appreciated, tell me when they are ready.

sweetie:
its alrite, never mind  8)

ya, got ur point , Thank You :D

sure , i'll  inform u when dey r ready  :)

3ishakay:

--- Quote from: nid404 on April 19, 2010, 06:34:17 am ---1g= 1/18 mole

1 mole=24dm3 at 298K and 1atm
but temp is 596 K...2 times

so 1 moles at 596K occupies 48dm3
1/18 X48= 2.67

C is the ans

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Thanks =D

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