determine δh for the third reaction from the information given. ba(s) o2(s) ↔ 2 bao(s) δh = -1107 kj ba(s) co2(g) 1/2 o2 ↔ baco3(s) δh = -822.5 kj bao(s) co2 ↔ baco3 δh = ?

100mg magnesium reacts with 20ml of 1.0m hcl

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

Acrystal that absorvd water from air is (blank)a. aqueousb. homogenousc. hygroscopicd. efflorescent