Identify the approximate bond angles in each molecule. Glycine, Acetonitrile, and Nitrous Acid

1) according to the law of conservation of mass ,in all chemical reactions total mass is unchanged

When china's civil war resumed, the nationalists held an advantage because the nationalist had more soldiers  than the communist.

The internal energy of the system we can term it as total potential energy and kinetic energy. energy flows out of the surrounding from the system then we can say that the internal energy of the final state is lower than its initials. the sign of  δesystem is negative.δesystem = efinal - einitial=-ve  efinal  ∠einitial.