How many ml of 4.0% mg(no3)2 solution would contain 1.2 g of magnesium nitrate?

How many electrons does silver have to give up in order to achieve a sido noble gas electron configuration

There are main groups in the modern periodic table of elements

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture