Ibuprofen, a common pain remedy, has an empirical formula of c7h9o and a molar mass of approximately 218.078 grams per mole. what is the molecular formula of ibuprofen?

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.

How many energy levels contain electrons in an atom of zirconium (zr)?