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so wat's a pure subatance?
pure substance have fixed composition
yes, it is not a mixture: it has its own formula.
it is fixed
but wat abt 22 crt gold??
u kno it has a different form in water say a solution
91.6% gold and remaning cu and ag
then is it a pure substance
22 carat gold is not pure gold. So it is not a pure substance, it is a mixture.
but then too it contain fixed composition!!!
Mixtures are those which dont have fixed composition!!
@Vincent-Lyon.Fr Can u help??
No, because you can have 21.9 or 22.2 carat at your own will. Proportions in pure substances are dictated by the laws of nature, not by your own free will.
Glucose is a compound - it's definitely a pure substance. Ofcourse however, the molecules may be found in a pure state, in in a mixture or a solution - but that's a completely different story.
'22 carats of gold' is just a way of representing the concentration of the element gold in the mixture, i.e. the alloy.
is it a pure ..
i think it is....))
No, milk is a mixture of lots of molecules: water, fats, proteins, sugars