sentence: People use many different extra chemicals.
sentences_after: These are just the ones that are used the most. Metal oxides are one group of extra chemicals. These make the rocket candy burn faster. Metal oxides work best at levels from 1 to 5 percent. This means between one and five grams of extra chemical for every one hundred grams in the fuel.
concept_name: People
headings: Rocket candy Components Extra chemicals
categories: Fuel Rockets