When a 4.2 gram sample of mercury (Il) oxide, HgO is decomposed into its elements by • heating, 3.2 grams Hg is obtained and the rest is oxygen. What is the percent
composition of mercury and oxygen?

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %