Early wheels were simple wooden disks with a hole for the axle. In the early Roman empire, most horse-carts used a design featuring two chords across the wheel. The spoked wheel was invented much more recently, and allowed the construction of lighter and swifter vehicles.
Chromium(III) sulfide. Chromium(III) Sulfide is the inorganic compound with the formula Cr2S3. It is a brown-black solid. Chromium sulfides are usually nonstoichiometric compounds, with formulas ranging from CrS to Cr0.67S (corresponding to Cr2S3). Preparation.
i need to know the chemical names of [Cr(H2O)6]Br2 and [CoCl(NH3)5]SO4 and the chemical formula for tris(1,3-diaminopropane)chromium(III) chloride also if you know the structures of the complex [Ru(NH3)3Cl3 or [Co(en)2(NO2)2]+ any of these answers would help out a great deal. Follow. 2 answers 2.