For instance, breathable oxygen gas O2 is an example of a molecule (but, not a compound), while carbon dioxide CO2, the gas we exhale, is an example of a molecule that is a compound.Answer and Explanation: A substance is a material that has constant or uniform chemical and physical comp...
Chemistry is the study of physical matter, which may be classified in many different ways, such as state of matter (gas, liquid or solid), chemical form (element, mixture or compound), chemical structure (atoms or molecules, etc.) and so on. ...
What is the molecular formula of acetone? What is solubility in physical chemistry? What is a pure substance in chemistry? The greatest solvent in the world is What is a compound in chemistry? What is dissolution in chemistry? What property of water allows water to work as a universal solven...
What Is This Substance? What Makes It Different? Mapping Progression in Students' Assumptions about Chemical Identity. Int. J. Sci. Educ. 2014, 36Ngai, C., Sevian, H., and Talanquer, V., What is this Sub stance? What Makes it Different? Mapping Progression in Students' Assumptions ...
Sublimation in chemistry refers to the phase transition in which matter changes state from a solid immediately into a gas, without passing through an intermediate liquid phase. Sublimation occurs when atmospheric pressure is too low for a substance to ex
Every substance in the world is made of“chemicals”, either in the form of chemical compounds in which atoms are linked by chemical bonds or, in a few cases such as helium gas, as unlinked atoms. No substances can be called“chemical-free”. Indeed,“natural”chemicals do not always ...
One millimolar (1 mM) is equal to one-thousandth of a mole per liter (1/1000 mol/L). If a solution has a 5 millimolar (5 mM) concentration for a particular substance, it means that there are 5 millimoles of that substance dissolved in one liter of the solution. Popular Questions ...
Chemistry is the branch which deals with the detailed study of matter, its properties, how and why atoms/substanced combine or separate to form other substances. Understand all the basic concepts of Organic, Inorganic, and Physical Chemistry with detaile
substance P which is very hard is used in the construction of many buildings epiecialy flooring When substance P is heated strongly, it decompose to from another soolid Q and a gas R is given our Solid Q reacts with water with the releade of a lot of heat to from a substance S. ...
Practitioners, called alchemists, thought that all matter was composed of different proportions of the four basic elements—fire, water, earth, and air—and believed that if you changed the relative proportions of these elements in a substance, you could change the substance. The long-standing ...