17th century Roman doctors believed that urine whitened teeth and also kept them firmly in place. As gross as that sounds, it most have worked because it was used as an active ingredient in toothpaste and mouthwash well into the 18th century. Would you believe it’s still used today? Thankfully, not in its original form! The formula for ammonia is NH3. a) How many mols are in 0.75 g of ammonia?

b) How many molecules of ammonia is this?

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next