A loaf of bread has a mass of 300 grams and the volume of the loaf of bread is 10 cm by 30 cm and 10 cm what is the density of the loaf of bread?

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

Can someone me with questions 12 and 13 plz.

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?