Why are elements put in a particular group?

How many covalent bonds are there in a molecule of cyclohexane?

Name five solvents available to the organic chemistry for use in the purification of organic compounds.

Hydrogen peroxide is a harmful by-product of normal metabolic activity. In order to prevent damage, hydrogen peroxide must be broken down into water and oxygen quickly. What would speed up the decomposition of hydrogen peroxide

If you have 100.0ml of a 30.0% aqueous solution of ethanol, what volume of water is in the solution?

What three important factors contribute to the United States' high GDP

The type of social bonds present in modern societies that are based on difference, interdependence, and individual rights is called:

The difference between ionic covalent and metallic bonding

As the speed of a particle increases, does its associated wavelenght increase or decrease

The composition of air by volume is approximately 1/5 oxygen, 4/5 nitrogen. When air is passed through red-hot carbon, the following reaction occurs: 2C + O2 (g) 2CO (g).

How many atomic mass units are equal to 1.672*10-24 g of protons?