incurred in producing goods.
5. It is a material that allows molecules of one kind to pass through it but
prevents the passage of other kinds of molecules.
6. It refers
the homogenous mixture of substances with variable
composition.
to
5. It is a material that allows molecules of one kind to pass through it but
prevents the passage of other kinds of molecules.
6. It refers
the homogenous mixture of substances with variable
composition.
to
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5.semi-permeable membranes
6. homogeneous mixtures and solutions