The second law of thermodynamics states that:

a. mass and energy are conserved in all chemical reactions.
b. the total energy of the universe is constant.
c. there is no disorder in a perfect crystal at 0 K.
d. the total energy of the universe is always increasing.
e. in a spontaneous process, the entropy of the universe increases.

Astudent made the lewis dot diagram of a compound shown. what is the error in the lewis dot diagram? a)an o atom should transfer all of its six electrons to mg because the formula is mgo b) both electrons of mg should be transferred to one o adam because the formula is mgo c) the electrons should be transferred from each o add him to capital mg because mg has fewer electrons d) the number of dots around mg should be four because it has to transfer two electrons to each o

Harvey mixes two liquids. which observation of the new mixture most likely indicates a precipitate is forming?

How do you know when a chemical reaction has occurred