Biology

Biology, 30.06.2019 19:20, dontcareanyonemo

Whats a pure substance that cant be broken down into simpler substances by chemical or physical means

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Chemistry, 11.07.2019 14:00, eva4548

There are four substances, a, b c and d. a and c are pure substances. they cannot be broken down into anything simpler by chemical methods. b consists of a and d, which are not chemically bonded together. d is a pure substance. we can decompose d into a and c using chemical methods. how would we classify substance a, c, and d? substances abcd question 14 options: substances a and c are compounds, because they are pure substances that bond together to make substance d and cannot be broken using chemical processes . substance d is a mixture, because it is a pure substance made up of a and c. substances a and c are elements, because they are pure substances that bond together to make substance d and cannot be broken using chemical processes. substance d is a compound, because it is a pure substance made up of a and c. substances a and c are elements, because they are pure substances that bond together to make substance d and cannot be broken using chemical processes . substance d is a mixture, because it is a pure substance made up of a and c. substances a, c, and d, are elements. all pure substances are elements.

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Chemistry, 11.07.2019 14:00, shavonfriend27

There are four substances, a, b c and d. a and c are pure substances. they cannot be broken down into anything simpler by chemical methods. b consists of a and d, which are not chemically bonded together. d is a pure substance. we can decompose d into a and c using chemical methods. how would we classify substance a, c, and d? a: substances a and c are elements, because they are pure substances that bond together to make substance d and cannot be broken using chemical processes . substance d is a mixture, because it is a pure substance made up of a and c. b: substances a and c are compounds, because they are pure substances that bond together to make substance d and cannot be broken using chemical processes . substance d is a mixture, because it is a pure substance made up of a and c. c: substances a and c are elements, because they are pure substances that bond together to make substance d and cannot be broken using chemical processes. substance d is a compound, because it is a pure substance made up of a and c. d: substances a, c, and d, are elements. all pure substances are elements.

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Chemistry, 11.09.2019 00:30, 506132

Based on the information given, classify each of the pure substances as elements or compounds, or indicate that no such classification is possible because of insufficient information. analysis with an elaborate instrument indicates that substance a contains two elements. substance b and substance c react to give a new substance d. substance e decomposes upon heating to give substance f and substance g. heating substance h to 1000 ∘c causes no change. substance i cannot be broken down into simpler substances by chemical means. substance j cannot be broken down into simpler substances by physical means. heating substance k to 500 ∘c causes it to change from a solid to a liquid.

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