The energy required to start a reaction is called

ionization energy

kinetic energy

electronegative energy

activation energy

How many grams of acetic anhydride are needed to react with 4.65 g of salicylic acid?

How to convert 3.612 x 10^23 atoms Fe

The geological time scale divides the history of Earth into blocks of time known as eras, epochs, periods, and eons.

If you had excess aluminum, how many moles of aluminum chloride could be produced from 17.0 g of chlorine gas, cl2?

state the stimulus and its response. is the response a voluntary action or an involuntary action? explain

Which atom can accommodate an octet of electrons but doesn't necessarily have to?

Heat is an exchange of internal energy from one system to another due to A. a temperature difference between the systems. B. one system being gas and the other being solid. C. the systems having the same temperature. D.

Sierra did 500 J of work to move her couch. If she exerts 250 N of force on the couch, how far did she move it? (Work: W = Fd) 0.5 m 2 m 250 m 750 m'

Lead (ii) sulfide (pbs) has a ksp of 3.0 * 10-28. what is the concentration of lead (ii) ions in a saturated solution of pbs? 1.7 * 10-14m 1.5 * 10-14m 3.0 * 10-14m

A 2.17 gm sample barium reacted completely with water what is the equation for the reaction how many milliliters of dry H2 evoled at 21degree celcius and 748mm of Hg?