Example for next four problems: Compound formula: MgCl,
Element: Mg
# of Atoms: 1
Element: CI
# of Atoms: 2
gram formula weight (g): 9521
Compound Formula: Na2CO3
Element: Na
# of Atoms
Element:
# of Atoms
Elemento
# of Atoms
v
gram formula weight (g)

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

Phosphorous can form an ion called phosphide, which has the formula p3−. this ion can form an ion called phosphide, which has the formula p3−. this ion properties very similar to those of pforms when a phosphorus atom loses three protonsis called a cationcontains 18 electrons