Kerosene is the fuel used at Space X that combusts with oxygen to produce the thrust needed to propel the rockets into space. Elon Musk is trying to figure out how much kerosene he needs to get to Mars. He already knows the total amount of energy he needs to get the spaceship to Mars based on its mass and he knows the standard heat of formations of the reactants and products. Describe how he can figure out how many moles of kerosene he needs before the rocket leaves earth.

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.

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.