All plants need nitrogen to survive, but it is naturally available to them in only limited supplies. in 1909, engineers developed a process to make nitrogen available to plants by synthetically producing the chemical ammonia. once produced, ammonia could be used as a fertilizer for crops around the world to its nitrogen content.

the process that the engineers developed is still used today. it makes use of the reaction between nitrogen gas and hydrogen gas at very high pressures. nitrogen gas is the most abundant gas in the atmosphere and is widely available. hydrogen gas needs to be made from the methane found in natural gas. natural gas is a fossil fuel that can be extracted from underground reserves.

what natural resources are used to make ammonia fertilizers?

Achemical reaction (also known as a chemical change) produces substances that are chemically different from the starting materials. an example of a chemical reaction is the formation of water from hydrogen and oxygen gas.in a physical change, a substance changes its physical appearance but not its chemical identity. an example of physical change is the formation of liquid water from solid water, a familiar process called melting. physically, liquid water looks very different from solid water (ice) but the chemical identity, water, is the same for both. which of following changes that affect the composition of our atmosphere involve physical changes and which involve chemical reactions? oxygen gas changes to ozone during thunderstorms carbon dioxide is produced by the combustion of gasoline in an automobile engine. when coal, oil, and natural gas are decomposed in landsills they produce methane gas. freezing rain develops when a warm air mass overrides a cold air mass. fog forms from water vapor when the temperature drops below the dew point

In an exothermic reaction the bonding energy of the product is: less than the reactants same as the reactants greater than the reactants dependent upon the presence of a catalyst

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d