Calculate the molecular mass of Na2HPO4

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

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

What is the value of keq for the reaction expressed in scientific notation?