Physics, Chemistry and Biology: Post your doubts here!

[Lola_sweet]

help any1 plz
which substances have
antiseptic smell
easter like
petrol like
and vinegar like

vinger like: ethanoic acid
ester like: perfume
i dnt knw the rest

 

[Lola_sweet]

help any1 plz
which substances have
antiseptic smell
easter like
petrol like
and vinegar like

wht past paper?

 

[Mai(M4!)]

why would the rate of reaction decrease if , more volume and more concentrated acid is beng used?

the rate will increase

 

[Lola_sweet]

the rate will increase

thts wht i thought!
more volume and conc. means more particles are present for collisions to occur thus less time take for reaction and rate of the reaction speeds up!
someone help im confused

 

[Mai(M4!)]

who took the exam today

 

[shadowy4646]

why is the mixture of phenylamine and benzenediazonium mixed vigorously

 

[dubi2pro]

Q4 please!

 

[Muaaz Iqbal]

Assalam-o-Alaikum.
Post your Physics, Chemistry and Biology doubts in here and members, along with me will try their best to help you out.

Did you have IGCSE biology study guide

 

[princess sofia]

Did you have IGCSE biology study guide

its nt on internet for free

 

[princess sofia]

wht past paper?

mixture of all

 

[Muaaz Iqbal]

its nt on internet for free

Hmmmm Thanks btw I Also live in Buraydah

 

[Muaaz Iqbal]

its nt on internet for free

Are you giving exams in this session

 

[saif mahmoud]

how was the chemistry exam guys p61

 

[princess sofia]

Are you giving exams in this session

yeah

 

[princess sofia]

how was the chemistry exam guys p61

it was good wbu

 

[princess sofia]

Hmmmm Thanks btw I Also live in Buraydah

frm pisb grade 10 ?

 

[saif mahmoud]

it was good wbu

it was good too what did u do in q 4 last 3 parts was a bit tricky
the one about half T and S

 

[Mai(M4!)]

it was good too what did u do in q 4 last 3 parts was a bit tricky
the one about half T and S

s 8.4
t 16.8

 

[princess sofia]

it was good too what did u do in q 4 last 3 parts was a bit tricky
the one about half T and S

yeah they were , first i wrote wrong but thank God i had written in pencil ,
for the first i substracted reading of exp.2 frm dat of exp.1 , for second part i multiply 8.4 by 2
for the third i wrote that half volume of hcl for substance S thn sub T
hope dats rite

 

[tooba tj]

What did the percentage come in the mol question?