Which of the following is true about photosynthesis a. water is product b. most reactions within this process are exothermic. c. oxygen is a reactant. d. carbon dioxide is a reactant.

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?

Match each statement with the state of matter it describes