speedyboi:

na same thing

speedyboi:

salting out - I think a subtopic under PROTEIN - a topic under NUTRIENTS

Nomski0: please explain further. I'm not familiar with it in proteins or biology.

Oghos1: How do anaesthetics work?

speedyboi:

howelse? By numbing the nervous system noni!

Oghos1:
Be a little bit more detailed sir

adaobi123: I hate physics.

adaobi123: I hate physics.

Oghos1: *mj's voice 'yu r nt alooooone'

I_am_Sylva:
welcome aunty ada.. Just tell us what u like.. This z a general science thread



here's a chemistry question


water has a considerably higher boiling point and
lower vapor pressure than other
molecules of similar or
larger molar mass. For
example, dinitrogen
(N2), methane
(CH4), etc. all have lower boiling points
and higher vapor
pressures than water at the same
temperature. How might this
be explained?

Okay. Its something to do with the intermolecular forces in between each water molecule. I think they more forces on h2o than in methane and n2 etc.

Abeg correct me if I'm wrong.

Also h2o has hydrogen bonds too.

speedyboi:

By blocking the nerves that connect a particular body part or region to the brain, preventing the nerves from carrying pain signals to your brain. Is that fair enough?

I_am_Sylva:
welcome aunty ada.. Just tell us what u like.. This z a general science thread



here's a chemistry question


water has a considerably higher boiling point and
lower vapor pressure than other
molecules of similar or
larger molar mass. For
example, dinitrogen
(N2), methane
(CH4), etc. all have lower boiling points
and higher vapor
pressures than water at the same
temperature. How might this
be explained?

Mikebis: Can any1 dffrentiate btw law of gravity and aerodynamics

speedyboi: My own question!

Explain what you understand by the term 'Earth Fault'.

I_am_Sylva:
earth fault is a phenomena that occurs
when electricity travels
outside an intended
path and tries to get to
the ground by the
shortest route.

speedyboi:

I would've spoilt this question if I was asked some years back! But make i still try sha

Because water forms a stronger hydrogen bonding. Water has two proton donors and two lone pair orbitals which act as acceptors for hydrogen bonds. This means each molecule can form four hydrogen bonds in a tetrahedral liquid.
methane on the other hand has no slightly positive or negative parts, so there are no strong molecular attraction. This causes the weak bond and the low boiling point

adaobi123:

Okay. Its something to do with the intermolecular forces in between each water molecule. I think they more forces on h2o than in methane and n2 etc.

Abeg correct me if I'm wrong.

Also h2o has hydrogen bonds too.

I_am_Sylva:
close
a bit close


lemme explain extensively

Water molecules are
polar due to
the polarity of covalent
bonds between oxygen and hydrogen atoms, and the bent shape of
molecules.

Hydrogen and oxygen atoms have different
electronegativities (H = 2.2; O = 3.5).
The difference between their electronegativities (1.3)
creates a strong
displacement of charge
making oxygen atoms
strongly negative,
leaving hydrogen
atoms strongly
positive. The position of
hydrogen atoms on one
side of thewater moleculemakes that side strongly positive, while the oxygen
side is strongly
negative.

Polar molecules
attract each other
electrostatically. In case of water, that
attraction is strong enough to be called
"hydrogen bonding" reserved for
polar molecules that
contain hydrogen
bonded to a small, highly electronegative
atom like F, O, or N.

Hydrogen bonding holds
water molecules
strongly to one another
preventing their
evaporation.
This in turn lowers water's vapor pressure
(less molecules evaporate), and raises
water's boiling point (more energy is
required to separate
molecules from each other).
By contrast, nitrogen (N2) and methane(CH4)
molecules are nonpolar in nature, and attract one another primarily with weak London
forces due to fluctuating dipoles
caused by momentary
fluctuations of electron
clouds around
atoms. In those substances, molecules are not attracted
to each other strongly, so they can
evaporate
easily. This in turn gives
those substances very high vapor pressure and
very low boiling points.

Rehnoy: Sorry sir, but this looks CoPIED & PASTED.

speedyboi:

Obviously . I thought this thread is 'without google'?

Rehnoy: What has here turned into?

Rehnoy: Sorry sir, but this looks CoPIED & PASTED.

speedyboi:

Obviously . I thought this thread is 'without google'?

Rehnoy: I almost thought so.

I_am_Sylva:
be rest assured sir.. I didn't use google.. Rather i used a textbook

I_am_Sylva:
lol.. No sir its not... Actually i used a textbook..

Rehnoy: You want me to prove you wrong?

speedyboi:

Same thing! . Both are reference materials

I_am_Sylva:
u r correct ma.. But no. 1 is actually carbondioxide

prof800:
Yea. 'Salting out' and 'Salting in'. From Introduction to Proteins Biology.
Third step in Protein Isolation
:-Ammonium sulphate precipitation(salting out)
:-simple dialysis(salting in)

It's too long ma.