questions on chemistry

[Jazz_Blue]

Starch consists mainly of amylose, which is a polymer made from glucose, C6H12O6, A particular form of amylose has a molar mass 3.62*10^5 gmol-1. A molecule of this amylose can be described as

The answer is a condesation polymer of 2235 glucose molecules.
Can someone explain this to me please?

[charmanderp]

Glucose has a molar mass of 180. However in a polymer each linkage between glucose molecules (a condensation reaction between hydroxyl groups) in a chain would result in the loss of water, which is a loss of 18 in molar mass.

So (3.62*10^5)/180-18=2234.567901 which rounds up to 2235 glucose molecules.

[Jazz_Blue]

Thanks!

In DNA, the number of phosphate groups are equals to the number of nitrogenous bases.
Why is it so?

[Somye]

If you look at a single nucleotide, the number of deoxyribose, nitrogenous bases and phosphate groups are all the same, 1, and hence the number of phosphate groups= the number of nitrogenous bases in DNA

[Jazz_Blue]

Thanks!

Can someone tell me what is the oxidation and reduction reaction for H2O2?

[charmanderp]

It's in your data booklet, I think.