Chemistry Help HERE ONLY !!

[Kim]

hey guys wassup?
ok i hav a few questions
1-how does the structure of metal explain why it is malleable?

2-suggest an explanation why exposure  to atmospheric pollution changes basic lead (11)carbonate into lead(11)sulphate

3-ethanol can be made from starch.this can be broken down by enzymes to simple sugars with formulae of the type shown
ho-(box)-oh
what other method changes starch into simple sugar?
sum1 help me

1) cuz when force is applied, the ion layers slip, but the delocalized electrons move into new positions preventing shattering
2)because atmospheric pollution may contain sulphuris acid( in acid rain) which reacts with the lead(II) carbonate forming
lead(II) sulphate + water + carbon dioxide
3)by acid hydrolysis ( boiling the starch with acid)

i cannot thank you both enogh u too NID404!!!!!!!!
i dunno wat i would haver don't withoiut this site!!!!!!!!!!!!!
again thank you

[nid404]

A diol or glycol is a chemical compound containing two hydroxyl groups (-OH groups)

so sugar is a diole but all dioles are not sugars. I hope u get it

[godfather93]

ok, here's a question from me: how do you make soda lime glass? (no looking at the book! )

hahaha, wats soda lime glass, i know hot to make glass, but not soda lime glass!!!!!!!!!!!
for glass: add limestone, sand and soda (if thats wat u mean by soda lime glass) to a very hot furnace
the materials react together, and form a hot liquid, and then the liquid is removed and shaped into many different products

soda lime glass is made by reacting limestone, sand and sodium carbonate together with the glass to be recycled at 1500^oC.
your answers was pretty close.

@nid - yeah, it's the time to sit back and enjoy some soda pop!

[nid404]

ok, here's a question from me: how do you make soda lime glass? (no looking at the book! )

hahaha, wats soda lime glass, i know hot to make glass, but not soda lime glass!!!!!!!!!!!
for glass: add limestone, sand and soda (if thats wat u mean by soda lime glass) to a very hot furnace
the materials react together, and form a hot liquid, and then the liquid is removed and shaped into many different products

soda lime glass is made by reacting limestone, sand and sodium carbonate together with the glass to be recycled at 1500^oC.
your answers was pretty close.

@nid - yeah, it's the time to sit back and enjoy some soda pop!

right. guys uve gotta relax.
chalo ive gotta go and make me fresh lime soda. this heat's killing me. My AC too cannot beat the heat but im sure the fresh lime will help cool my body.

buy guys
 

[Kim]

hey u guyz know those questions where they give the boiling points of sum alkanes and then ask to predict the boiling pt of one of them
how do u dat?

[thukon]

@ kim. just take the average in a kind of way. If u know what i mean.

@ nid. Thanks a lot. I guess u logged off but ill ask anyway so anyone can reply. All simple sugars are called glycols? And do complex sugars like starch have any special names? or can i call them polymers?

[unknown 101]

@ kim. just take the average in a kind of way. If u know what i mean.

@ nid. Thanks a lot. I guess u logged off but ill ask anyway so anyone can reply. All simple sugars are called glycols? And do complex sugars like starch have any special names? or can i call them polymers?

complex sugars like starch are usually called polysaccharides

[godfather93]

hey u guyz know those questions where they give the boiling points of sum alkanes and then ask to predict the boiling pt of one of them
how do u dat?

@ kim - to find the boiling point there r 2 cases -
1) they give u graph to draw and u have to predict the boiling point - in that case u have to continue the graph line in the same trend and read the value on the graph (known as extrapolation)
2) they give u table and tell u to predict the boiling point - then 4 sure there will be some linear trend shown by the boiling points given in the table.
hope u understand

@thukon - simple sugars like glucose and sucrose are called monosaccharides
               maltose and fructose are "bigger" molecules known as disaccharides
               starch and cellulose are complex molecules known as polysaccharides

[Nanavel]

Questions :

1) wha are the 2 uses of the 5 halogen atoms ??
2) explain by giving its structure why diamond is so hard ?? [4]
3) explain the structure of Diamond ??
4) describe the structure of germanium ?

[unknown 101]

hey u guyz know those questions where they give the boiling points of sum alkanes and then ask to predict the boiling pt of one of them
how do u dat?

@ kim - to find the boiling point there r 2 cases -
1) they give u graph to draw and u have to predict the boiling point - in that case u have to continue the graph line in the same trend and read the value on the graph (known as extrapolation)
2) they give u table and tell u to predict the boiling point - then 4 sure there will be some linear trend shown by the boiling points given in the table.
hope u understand

@thukon - simple sugars like glucose and sucrose are called monosaccharides
               maltose and fructose are "bigger" molecules known as disaccharides
               starch and cellulose are complex molecules known as polysaccharides

or they sometimes give u a table that has the boiling points, in that case u do second orgnic substance- first, third - 2nd , u see how much the difference is and if its constant, then u add the constant to the previous substance, if its not just do any reasonable prediction

[unknown 101]

Questions :

1) wha are the 2 uses of the 5 halogen atoms ??
2) explain by giving its structure why diamond is so hard ?? [4]
3) explain the structure of Diamond ??
4) describe the structure of germanium ?

1) used to make PVC (chlorine) , used in toothpaste(flourine)
2) because each carbon atom is covalentley bonded to 4 other carbons forming a tetrahedral giant macromolecule
3) same as 2
4) same as carbon ( but the answer depends on the question)

[godfather93]

the 2 uses of the 5 halogen atoms - that's a strange question. sorry, dunno the answer

diamond is so hard because the atoms are tightly held together in a tetrahedral structure. the inter molecular forces (van der waal's forces) is very very strong, hence it is so hard and rigid. the atoms are not arranged in layers, so it cannot slip over each other.

the structure of germanium is very similar to that of carbon (tetrahedral)

[unknown 101]

the 2 uses of the 5 halogen atoms - that's a strange question. sorry, dunno the answer

diamond is so hard because the atoms are tightly held together in a tetrahedral structure. the inter molecular forces (van der waal's forces) is very very strong, hence it is so hard and rigid. the atoms are not arranged in layers, so it cannot slip over each other.

the structure of germanium is very similar to that of carbon (tetrahedral)

the structure of germanium is similar to that of carbon, but it depends on the context of the question, right?

[Nanavel]

ehhh ..

what about silicon does it has anything to do with Diamond ??

in question 1 >> i mean to say that Give 2 uses for each halogon atom ?  like : a question came in the year 1996 that give 2 uses of Bromine and Iodine ?

so it thought it is better to know 2 uses for each halogen atoms .

[unknown 101]

ehhh ..

what about silicon does it has anything to do with Diamond ??

in question 1 >> i mean to say that Give 2 uses for each halogon atom ?  like : a question came in the year 1996 that give 2 uses of Bromine and Iodine ?

so it thought it is better to know 2 uses for each halogen atoms .

you dont have to know 2 uses for each halogen

and for silicon its usually in the from silicon dioxide(silica)
then u have to say, each silicon atom is covalentley bonded to four oxygen atoms, forming a tetrahedral giant macromolecule