8. you and your friend, bill, are given a rock that you know has some silicon. you just learned that there are 3 common isotopes of silicon- silicon-28, silicon-29, and silicon-30. bill suggests that the rock might have equal parts of each isotope. what would be the average mass of silicon in the rock? show your calculations. how could you check to see if your ideas are correct?

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

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

Is laundry detergent an acid or a base?