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

Brown - Chemistry: The Central Science 14th Edition

Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232당신이 사용하는 게 아니라요?교과서 변경

Brown 14th Edition

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

문제 92g

1장, 문제 92g

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.

검증된 단계별 안내

Identify the number of significant figures in 0.0033. Significant figures are the digits that carry meaning contributing to its precision. Leading zeros are not significant.

Count the significant figures in 0.0033. The digits '33' are significant, so there are 2 significant figures.

Identify the number of significant figures in 0.033. Again, leading zeros are not significant.

Count the significant figures in 0.033. The digits '33' are significant, so there are 2 significant figures.

Compare the number of significant figures in both numbers. Since both 0.0033 and 0.033 have 2 significant figures, the statement is false. A corrected version of the statement is: 'The number 0.0033 has the same number of significant figures as 0.033.'

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.

Significant Figures

Significant figures are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion. Understanding significant figures is crucial for accurately reporting measurements and performing calculations in chemistry.

Leading Zeros

Leading zeros are the zeros that precede all non-zero digits in a number. They are not considered significant because they do not affect the value of the number. For example, in the number 0.0033, the leading zeros do not count towards the significant figures, which are only the '3' and '3'.

Comparing Significant Figures

When comparing the number of significant figures in two numbers, it is essential to identify the significant digits in each. In the case of 0.0033 and 0.033, both have two significant figures, as the leading zeros do not count. Thus, the statement that 0.0033 has more significant figures than 0.033 is false.

관련 실천

교과서 질문

Judge the following statements as true or false. If you believe a statement to be false, provide a corrected version. (i) Compounds always contain at least two different elements.

630

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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.

331

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교과서 질문

You are assigned the task of separating a desired granular material with a density of 3.62 g/cm³ from an undesired granular material that has a density of 2.04 g/cm³. You want to do this by shaking the mixture in a liquid in which the heavier material will fall to the bottom and the lighter material will float. A solid will float on any liquid that is more dense. Using an Internet-based source or a handbook of chemistry, find the densities of the following substances: carbon tetrachloride, hexane, benzene, and diiodomethane. Which of these liquids will serve your purpose, assuming no chemical interaction takes place between the liquid and the solids?

724

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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. (c) Compounds can be decomposed into two or more other substances; elements cannot.

585

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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.

524

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