Alcatuieste formulele substantelor compuse dupa valenta, stabilind indicii si coeficientii. Indica tipul reactiei. a)_ FeOH->Fe2O3+_H2O

b)N2+O2->_N O

Two friends at different locations want to communicate with each other by sending low energy signals. which of the following methods can they use to communicate? a) produce x-rays using colliding electrons and send them to radios, which capture sound b) send messages using infrared radiation, which travel in the form of waves c) send radio waves through intervening media like radio and television d) produce sound waves using microwaves from heated objects

What happens to the atomic radius when an elctron is lost

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?