What is co-ordinate covalent bond? why does such type of bonding arise?

What is the mass of 4 molecules of co2

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

Free answer. the treaty of versailles ended world war i, but some of the terms of the treaty contributed to the beginning of world war ii. which was one of the terms of the treaty? the answer would be "germany was forces to pay reparations to the allied countries.". i hope this .