I'm proud to present you first  android version of Chemistry Calculator. This basic version will be upgraded soon with additional features (pH calculations, gas laws..). Feel free to try and suggest about features you want to see in this software.
https://play.google.com/store/apps/details?id=rs.teach.simplecalc

By ideal gas we imply a collection of particles (atoms or molecules) which are in continuous random motion. Diameter of particles is negligibly small in contrast of distance between particles. Interactions between particles are also negligible, except in the moment of collision and the collision is considered to be ideal elastic collision.

By the degrree of order of a material system we can differ 3 agregative states:

1. Gaseous state – particles are equaly dispersed in space that gas occupies. Gas particles are in continous random motion and are in contact only in moment of collision
2. Liquid state – particles are in constant contact kept by attractive forces, with constant mean distance and particle motion is decreased significantly.
3. Solid state – particles are fixed, oscillatory motion is predominant, limited by surrounding particles.

Author: Milan Šljukić

Although most people find confusing how do we get the certain properties, actually it’s very simple. Blood groups are inherited from both parents. The ABO blood type is controlled by a single gene (the ABO gene) with three alleles: i, IA, and IB. The gene encodes a glycosyltransferase—that is, an enzyme that modifies the carbohydrate content of the red blood cell antigens.

Preliminary version of Chemistry Calculator V2 (alpha) is here. Please try it and feedback your impressions. This version is programmed in HTML+JavaScript+CSS technologie. Desktop version is made for Adobe AIR. Soon we will develop mobile versions for Android and iOS.
We are thinking about more features to put into the program. All your suggestions will be precious.
Thank you.
 

2,4-dinitrofluorobenzene is often used for determination of N-terminal end of polypeptide. This compound has fluor atom on aromatic ring wich is good leaving group in Nucleophilic supstitution reactions. On the other hand, amino group on N-terminal end of polypeptide is good nucleophile. Together they are reactants in nucleophilic supstitution, and this reaction is first step in determination of amino acid on N-terminal end of polypeptide.

Lactose sugar is found in many milk products, as it always makes up 2-8 % of milk. Normally, during the process of digestion, with the help of lactase enzyme(β-galactosidase), it breaks down into glucose and galactose.

Chemistry is the science about matter. It study chemical reactions and transformations,  its composition, structure and properties. Chemistry is sometimes called "the central science" because it connects physics with other natural sciences such as geology, biology and medicine.