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chemistry
Term | Definition |
---|---|
activation energy | what is needed to start a chemical reaction |
arrow | you reed the arrow as ''yields'' in a chemical equation or formula |
characteristics of a chemical reaction | changes in energy or changes in proprieties |
chemical changes | alter the chemical proprieties of matter new substances with new properties are found |
chemical equations | a shorter easier way to show chemical reactions buy using symbol incited of using words |
coefficient | a number placed in front of a chemical formula in a equation |
conservation of mass | the amount of matter involved in a chemical reaction does not change |
controling rates of rection | temp,concen,sur,cata,enzy,inhibit |
decomposition reaction | a compound breaks down into simpler substances |
endothermic reaction | an observable change in energy that shows in a chemical reaction took place |
physical change | alter only the physical proprieties of matter |
preticipate | a solid that forms from solution during a chemical reaction |
exothermic | an observable change in energy that shows in a chemical reaction took place |
products | the materials you have after a chemical reaction |
reactants | the materials you have before a chemical reaction |
replacement reaction | one part of a compound is displaced by a element |
states of mater | solid ,liqid, gas |
subscript | sow a number of atoms in a molecule |
synthesis reaction | 2 substances combine to form a new compound |