Solid potassium superoxide, KO2, is employed in a self-contained breathing apparatus used by emergency personnel as a source of oxygen. The reaction is potassium superoxide reacting with molecular water to produce solid potassium hydroxide and molecular oxygen gas. A self-contained breathing apparatus is charged with 750. g KO2 and then is used to produce 195 g of oxygen. Was all of the KO2 consumed in this reaction? If the KO2 wasn't all consumed, how much is left over and what mass of additional oxygen could be produced?

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.