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Which of the following is a pure substance? Pure gold, pure milk, pure water, pure seawater, pure sand. And how do you know?
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Burningitdown
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Well, rule some out. Which ones do you know aren't? That is, if you do know any of them aren't.
Burningitdown
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Hello?
need_help!
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Well sand is obviously not..right?
need_help!
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Sorry..
Burningitdown
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It's fine, and no it isn't. Anything else?
need_help!
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What do they mean by pure substance here?
need_help!
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I mean like how can I know?
Burningitdown
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What they mean by Pure substance, is something that can't be split into different things.
An example is..|dw:1350413254215:dw| The tree, it has leafs, wood, and so on.
need_help!
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Oh wait! I read something about pure substance that it may be compound or element
Burningitdown
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Mhmm.
need_help!
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This is confusing >.<
Burningitdown
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Well.. Let me think of how to put it.
need_help!
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They're all pure except one?
Burningitdown
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Lets say, you have milk, alright? If you add cereal to it, it's no longer just milk. You're turning adding onto it. A pure substance is something that is only of one thing. Like..Say you have oxygen. Oxygen isn't a mixture of gasses, it's simply Oxygen. Nothing else but. That's a pure substance.
Burningitdown
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No, No. All of them aren't pure, besides one.
need_help!
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Gold isn't pure?
need_help!
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water isn't pure?
need_help!
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sand isn't pure?
Burningitdown
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Well.
need_help!
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Okay lets take your example you can add hydrogen to oxygen and it's no longer just oxygen.. right?
Burningitdown
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Water isn't pure, it has other things in it such as sand and chlorine. Minerals, all in all.
Burningitdown
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And, yes.
Burningitdown
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But, what is gold?
need_help!
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Ahhh! I get it! -I think- So pure means that it's only like one thing or element that can't be broken down more
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Gold is an element.. so it's pure?
Burningitdown
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Yes. ^^"
Burningitdown
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Gold is only gold.
need_help!
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Yay! Thanksss LOOAADSSSSSSS :D
Burningitdown
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Course. ^^"