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.
What is the formula for Chromium (II) phosphide? The formula for Chromium (II) phosphide is Cr3(PO4)2 Cr3(PO4)2. What is the formula for copper (II) phosphide? Cu3(PO4)2 is the chemical formula for copper (II) phosphide. What is the chemical formula for Tin(IV) phosphide? Sn3P4. What is the empirical formula for Nickel (II) phosphide. Nickel(II) sulfate, or just nickel sulfate, usually refers to the inorganic... what is the Chemical formula for lead IV phosphide and iron II phosphate. Wendy, the person asked for Lead (IV) Phosphide and that is Pb3P4