For the decomposition reaction given below: CaCO3 ( CaO(s) + CO2 (g) Assuming that the initial concentration of CaCO3 is 0.50M and its final concentration after 50minutes of reaction is 0.15M, determine the rate constant and half life for the first order process.​

Which of the following statements is false regarding aromaticity? a. the compound must be cyclic b. the compound must be fully conjugated c. the compound must be planar d. the number of electrons in the pi system must satisfy the hückel 4n+2 rule e. the compound must have a neutral charge

Chemical energy is a form of a. kinetic energy only. b. both potential and kinetic energy. c. neither potential nor kinetic energy. d. potential energy only. reset

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?