Edexcel IAL Chemistry Unit 01 - 26th of May, 2017

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Hoping the same honestly. Yeah I am. I have bio the day after and then Chem on Friday.
I am so done rn, I'm trying to solve a logarithm ques rn and I just can't concentrate.

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maybe u should take a break.. log questions are okay.. i just suck at sequence :/

Reply 41

Droneon

Original post by zooshan

maybe u should take a break.. log questions are okay.. i just suck at sequence :/

SEQUENCES yes oh my god I suck too :frown:

Not that I suck at log but I just can't do anymore lol

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Reply 42

zooshan

Original post by Droneon

SEQUENCES yes oh my god I suck too :frown:

Not that I suck at log but I just can't do anymore lol

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i stpoed way before.. my brain is jammed..

Reply 43

Droneon

Original post by zooshan

i stpoed way before.. my brain is jammed..

Yeah I'm totally stopping rn. Good luck for tomorrow tho :smile:

Watch out for those elementary mistakes. :/

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Reply 44

zooshan

Original post by Droneon

Yeah I'm totally stopping rn. Good luck for tomorrow tho :smile:

Watch out for those elementary mistakes. :/

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good luck to u too :smile:

lets watch out.. i think i should write that down on my paper LOL

Reply 45

Droneon

Original post by zooshan

good luck to u too :smile:

lets watch out.. i think i should write that down on my paper LOL

LOL no you should, start the paper with it :biggrin:

You go girl!

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Reply 46

zooshan

Original post by Droneon

LOL no you should, start the paper with it :biggrin:

You go girl!

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hehehe .. u too... i pray we do this paper well... i need better marks.. c34 is a nightmare..

Reply 47

mr.holmes

can anyone please explain for me how to determine the direction of the arrows in Hess law?

Reply 48

zooshan

Original post by Droneon

LOL no you should, start the paper with it :biggrin:

You go girl!

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heyy how was the c12 paper? ( i dont know anyone else who is doing c12)

Reply 49

zooshan

Original post by mr.holmes

can anyone please explain for me how to determine the direction of the arrows in Hess law?

it depends on the question.. but either way its always the reagents to the products..

Reply 50

Droneon

Original post by zooshan

heyy how was the c12 paper? ( i dont know anyone else who is doing c12)

Lol I dmed you. This is the chemistry thread after all :biggrin:

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Reply 51

zooshan

Original post by Droneon

Lol I dmed you. This is the chemistry thread after all :biggrin:

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hehe..
yeah i just started chem revising..

Reply 52

Reshyna

@raai ahamed, how's the exam preparations going on for tomorrow's exam?

Reply 53

Aadha24

Guys can u help me out with the electolysis to which shows that there is two typea of ions it

Reply 54

Saima Hasnain

hey, how can you tell how many unpaired electrons an atom has in its ground state e.g. nitrogen?

Reply 55

Droneon

Original post by Saima Hasnain

hey, how can you tell how many unpaired electrons an atom has in its ground state e.g. nitrogen?

From its electronic configuration

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Reply 56

Droneon

Original post by Aadha24

Guys can u help me out with the electolysis to which shows that there is two typea of ions it

What's the question

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Reply 57

raai ahamed

Original post by Aadha24

Guys can u help me out with the electolysis to which shows that there is two typea of ions it

that's nothing!! it is an evidence for the existence of ions and u have commonly the two cases:
1.KMnO4 and 2.CuCrO4

Reply 58

mr.holmes

hey
can anyone please help me with these questions? i will really appreciate it!
1. which of the following contains one mole of neutrons?
A 1g of H1,1
B 1g of C 12,6
C 2g of Mg 24, 12
D 2g of Ne 22,10

2.
10 g of Mg is added to 1dm3 of 1concentration copper (ii) sulfate solution and the mixture is stirred until no further reaction occurs.
which of the following is a result of this reaction?
A The resulting solution is colourless.
B 10 g of copper is displaced.
C 63.5 g of copper is displaced.
D All the magnesium reacts.

3.
100 cm3 of hydrogen is mixed with 25 cm3
of oxygen at a temperature of 150qC.
The*gases react as shown in the equation below.
2H2(g)+ O2(g) o 2H2O(g)
The total volume of gas present at the end of the reaction is
A 50 cm3
B 100 cm3
C 125 cm3
D 150 cm3

4.
An experiment was carried out to measure the enthalpy change of the following reaction.
NaOH(aq) + HCl(aq) ---------> NaCl(aq) + H2O(l)
50 cm3 of hydrochloric acid was mixed with 50 cm3
of sodium hydroxide solution.Each solution contained 0.10 mol solute. The temperature rise was 12C.
Energy transferred (J) = mass of solution × 4.2 × change in temperature
Assume the density of all solutions is 1.0 g cm–3.
What is the enthalpy change of the reaction in kJ mol–1?

A -(50 x4.2x12/0.1x 1000)
.
B -(50 x4.2x12/0.2x 1000)
.
C -(100 x4.2x12/0.1x 1000)
.
D -(100 x4.2x12/0.05x 1000)