Concept map of MATTER - can be a substance- can be a

Substance - Elements and Compounds

Example of element is oxygen and that of compound is water.

Matter can be classified into mixture.

It can be heterogeneous and homogenous.

Example of heterogeneous mixture is milk.

Example of homogeneous mixture is air.

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2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

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