Depends on the chemicals, you get a different reaction from different ones.
The mass of the two chemicals are just combined, and are never changed. They may change forms, like from a solid to a gas, but the mass is always the same.
These chemicals are called reactants.
When ammonia and bleach are combined, they create a toxic gas called chloramine, which can cause respiratory issues and other health problems. It is important to never mix these two chemicals together.
A combination of chemicals is known as a reaction. When two chemicals, which are referred to as reactants, are combined, they for a chemical compound.
When a chemical base is combined with an acid, a neutralization reaction occurs. The base accepts hydrogen ions (H+) donated by the acid, which results in the formation of water and a salt. The pH of the solution changes towards neutrality.
Yes
Chemicals yes, elements however, no. Elements are themselves chemicals, Burn hydrogen in oxygen and you'll end up with water, another chemical.
you die
A mixture contains 2 or more chemicals that are not chemically combined, meaning they can be physically separated. Examples include saltwater and air.
A mixture.
water, hydrogen peroxide
Hydrogen peroxide and a phenyl oxalate ester are combined inside a glow stick. When these two chemicals mix, they undergo a chemical reaction that produces light.