Which statements correctly describe covalent bonding? Select ALL the correct answers.

A. Atoms share a pair of valence electrons.
B. Atoms are held together by their opposite charges.
C. Distinct groups of atoms called molecules are formed.
D. Metal atoms bond with other metal atoms.

Based on the equation and the information in the table, what is the enthalpy of the reaction?

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

Steam reforming of methane ( ch4) produces "synthesis gas," a mixture of carbon monoxide gas and hydrogen gas, which is the starting point for many important industrial chemical syntheses. an industrial chemist studying this reaction fills a 1.5 l flask with 3.5 atm of methane gas and 1.3 atm of water vapor at 43.0°c. he then raises the temperature, and when the mixture has come to equilibrium measures the partial pressure of carbon monoxide gas to be 1 .0 atm. calculate the pressure equilibrium constant for the steam reforming of methane at the final temperature of the mixture. round your answer to 2 significant digits.