Concept explainers
(a)
Interpretation:
The given quantity is to be expressed in exponential notation. Also significant zeroes and digits are to be determined.
Concept introduction:
Significant figures of a number are the digits which carry meaningful contribution to its measurement resolution. The rightmost digit of the quantity is the most uncertain digit.
The number of certain and uncertain digit in a quantity is considered as significant figures. The digit with a higher number of significant figures has a higher certainty of measurement.
To determine the number of significant figures in a quantity following steps are followed.
1. The quantity must has a decimal point.
2. Start counting from the left and proceed towards the right until the first nonzero digit is encountered. All nonzero digit and the zeroes between two nonzero digits are considered as significant figures. For example, 0.0000765 has three significant figures and 7009 has four significant figures.
3. Zeroes after a decimal point are significant figures. For example, 42.0 have three significant figures.
4. Trailing zeroes that do nothing but are used to set a decimal point are non-significant figures. However, exponential notation can be used to avoid confusion. For example, 4300 has 3 significant figures. It can be expressed in scientific notation as
5. Zeroes present before a trailing decimal point are significant figures. For example, 3200 has only two significant figures but 3200. has 4 significant figures.
(b)
Interpretation:
The given quantity is to be expressed in exponential notation. Also significant zeroes and digits are to be determined.
Concept introduction:
Significant figures of a number are the digits which carry meaningful contribution to its measurement resolution. The rightmost digit of the quantity is the most uncertain digit.
The number of certain and uncertain digit in a quantity is considered as significant figures. The digit with a higher number of significant figures has a higher certainty of measurement.
To determine the number of significant figures in a quantity following steps are followed.
1. The quantity must has a decimal point.
2. Start counting from the left and proceed towards the right until the first nonzero digit is encountered. All nonzero digit and the zeroes between two nonzero digits are considered as significant figures. For example, 0.0000765 has three significant figures and 7009 has four significant figures.
3. Zeroes after a decimal point are significant figures. For example, 42.0 have three significant figures.
4. Trailing zeroes that do nothing but are used to set a decimal point are non-significant figures. However, exponential notation can be used to avoid confusion. For example, 4300 has 3 significant figures. It can be expressed in scientific notation as
5. Zeroes present before a trailing decimal point are significant figures. For example, 3200 has only two significant figures but 3200. has 4 significant figures.
(c)
Interpretation:
The given quantity is to be expressed in exponential notation. Also significant zeroes and digits are to be determined.
Concept introduction:
Significant figures of a number are the digits which carry meaningful contribution to its measurement resolution. The rightmost digit of the quantity is the most uncertain digit.
The number of certain and uncertain digit in a quantity is considered as significant figures. The digit with a higher number of significant figures has a higher certainty of measurement.
To determine the number of significant figures in a quantity following steps are followed.
1. The quantity must has a decimal point.
2. Start counting from the left and proceed towards the right until the first nonzero digit is encountered. All nonzero digit and the zeroes between two nonzero digits are considered as significant figures. For example, 0.0000765 has three significant figures and 7009 has four significant figures.
3. Zeroes after a decimal point are significant figures. For example, 42.0 have three significant figures.
4. Trailing zeroes that do nothing but are used to set a decimal point are non-significant figures. However, exponential notation can be used to avoid confusion. For example, 4300 has 3 significant figures. It can be expressed in scientific notation as
5. Zeroes present before a trailing decimal point are significant figures. For example, 3200 has only two significant figures but 3200. has 4 significant figures.
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Chapter 1 Solutions
CHEMISTRY: MOLECULAR NATURE ALEKS ACCESS
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- Stereochemistry Identifying the enantiomer of a simple organic molecule 1/5 Check the box under each structure in the table that is an enantiomer of the molecule shown below. If none of them are, check the none of t above box under the table. Br ま HO H 0 Molecule 1 Molecule 2 Molecule 3 OH H Br H H" Br OH Br Molecule 4 Br H OH + + OH Molecule 5 Br H OH none of the above Molecule 6 Br H... OHarrow_forwardPlease answer the questions and provide detailed explanations.arrow_forwardQuestion 16 0/1 pts Choose the correct option for the following cycloaddition reaction. C CF3 CF3 CF3 CF3 The reaction is suprafacial/surafacial and forbidden The reaction is antarafacial/antarafacial and forbidden The reaction is antarafacial/antarafacial and allowed The reaction is suprafacial/surafacial and allowedarrow_forward
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- Provide the proper IUPAC or common name for the following compound. Dashes, commas, and spaces must be used correctly. Br ......Im OHarrow_forwardCan you please help me solve this problems. The top one is just drawing out the skeletal correct and then the bottom one is just very confusing to me and its quite small in the images. Can you enlarge it and explain it to me please. Thank You much (ME EX1) Prblm #33arrow_forwardI'm trying to memorize VESPR Shapes to solve problems like those. I need help making circles like the second image in blue or using an x- and y-axis plane to memorize these and solve those types of problems, especially the ones given in the top/first image (180, 120, 109.5). Can you help me with this? or is their any other efficient method do soarrow_forward
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