A gas mixture contains 88 grams of oxygen gas, 88 grams of nitrogen gas, and 12 grams of nitrogen dioxide gas. What is the mole fraction of nitrogen dioxide in this mixture? 0.04

0.12

0.45

0.51

The answer is b on plato.

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.

Idon't know hope someone you

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.