Ch.1 - Introduction: Matter, Energy, and Measurement

Brown - Chemistry: The Central Science 15th Edition

Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970당신이 사용하는 게 아니라요?교과서 변경

Brown 15th Edition

Ch.1 - Introduction: Matter, Energy, and Measurement

문제 97c

1장, 문제 97c

Judge the following statements as true or false. If you believe a statement to be false, provide a corrected version. (c) Compounds can be decomposed into two or more other substances; elements cannot.

검증된 단계별 안내

Understand the definition of a compound: A compound is a substance formed when two or more chemical elements are chemically bonded together.

Understand the definition of an element: An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Evaluate the statement: Compounds can indeed be decomposed into two or more other substances through chemical reactions, such as decomposition reactions.

Evaluate the statement: Elements cannot be decomposed into simpler substances by chemical means, which is true.

Conclude that the statement is true as it correctly describes the nature of compounds and elements.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Compounds vs. Elements

Compounds are substances formed from two or more elements that are chemically bonded together, while elements are pure substances that cannot be broken down into simpler substances by chemical means. For example, water (H2O) is a compound made of hydrogen and oxygen, whereas hydrogen (H) and oxygen (O) are elements.

Decomposition Reactions

Decomposition reactions involve breaking down a compound into its constituent elements or simpler compounds. This process can occur through various means, such as heating or electrolysis. For instance, when water is electrolyzed, it decomposes into hydrogen and oxygen gases.

Chemical Stability of Elements

Elements are considered the most basic form of matter and cannot be decomposed into simpler substances through chemical reactions. Each element is defined by its number of protons, and while they can combine to form compounds, they retain their identity and cannot be broken down further chemically.

관련 실천

교과서 질문

Judge the following statements as true or false. If you believe a statement to be false, provide a corrected version. (g) The number 0.0033 has more significant figures than 0.033.

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교과서 질문

Judge the following statements as true or false. If you believe a statement to be false, provide a corrected version. (b) All mixtures contain at least one element and one compound.

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교과서 질문

Judge the following statements as true or false. If you believe a statement to be false, provide a corrected version. (a) Air and water are both elements.

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교과서 질문

Judge the following statements as true or false. If you believe a statement to be false, provide a corrected version. (d) Elements can exist in any of the three states of matter.

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교과서 질문

Judge the following statements as true or false. If you believe a statement to be false, provide a corrected version. (f) A hypothesis is more weakly supported by experimental evidence than a theory.

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교과서 질문

Gold is alloyed (mixed) with other metals to increase its hardness in making jewelry. (a) Consider a piece of gold jewelry that weighs 9.85 g and has a volume of 0.675 cm3. The jewelry contains only gold and silver, which have densities of 19.3 and 10.5 g/cm³, respectively. If the total volume of the jewelry is the sum of the volumes of the gold and silver that it contains, calculate the percentage of gold (by mass) in the jewelry. (b) The relative amount of gold in an alloy is commonly expressed in units of carats. Pure gold is 24 carat, and the percentage of gold in an alloy is given as a percentage of this value. For example, an alloy that is 50% gold is 12 carat. State the purity of the gold jewelry in carats.

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