Who said atoms are neither created nor destroyed in chemical reactions?

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

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

How do you convert 4 mmol of bromobenzene to ml?