The significant figures in the given number 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 a 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 have 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, the exponential notation can be used to avoid confusion. For example, in 4300 has 3 significant figures. It can be expressed in scientific notation as 4.30 × 10 3 or 4.300 × 10 3 . The number of significant figures in 4.30 × 10 3 and 4.300 × 10 3 is 3 and 4 respectively. 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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Answer 1

Question

Chapter 1, Problem 1.47P

(a)

Interpretation Introduction

Interpretation:

The significant figures in the given number 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 a 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 have 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, the exponential notation can be used to avoid confusion. For example, in 4300 has 3 significant figures. It can be expressed in scientific notation as 4.30×103 or

4.300×103. The number of significant figures in 4.30×103 and 4.300×103 is 3 and 4 respectively.

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 Introduction

Interpretation:

Whether the actual number of people were counted or not is 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 a 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.

A number with no uncertainty and that has a certain value is called an exact number. It has an infinite number of significant figures and does not limit or affect the number of significant figures in the final answer to the calculation.

(c)

Interpretation Introduction

Interpretation:

The actual number of people that could have been present at the game is 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 a 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 have 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, the exponential notation can be used to avoid confusion. For example, in 4300 has 3 significant figures. It can be expressed in scientific notation as 4.30×103 or

4.300×103. The number of significant figures in 4.30×103 and 4.300×103 is 3 and 4 respectively.

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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Part I. Problem solving. Include all necessary calculations 13 provide plots and graphs. Complexation wl diphenyl carbazide (OPC) in acidic media is another type of sensitive photometric method used for the analysis of aqueous. hexavalent chromium. At 540nm the cherry-red complex as a result of DPC reaction w/ chromium can be photometrically measured. at this wavelength. - a 25mL The UV-vis analysis for the determination of nexavalent chromium in ground water sample is given below. The experiment was based on external calibration method w/ each measurement sample prepared are as follows lab sample analysis contained the standard 100 ppb croy cor groundwater sample, volumes used as indicated below), 12.50 mL of 0.02 M H2Soy and 5.50 ml of 100 ppm DPC (wi water to adjust final volume to 25-ml). The main stripping method was square wave voltammetry, following the conditions set in the main ASV experiment. Standard 100 Volumetric Groundwater H2SO4 0.20 M, flask Sample, mL ppb CrO4*, 100…

Answer 2

Question

Chapter 1, Problem 1.47P

(a)

Interpretation Introduction

Interpretation:

The significant figures in the given number 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 a 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 have 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, the exponential notation can be used to avoid confusion. For example, in 4300 has 3 significant figures. It can be expressed in scientific notation as 4.30×103 or

4.300×103. The number of significant figures in 4.30×103 and 4.300×103 is 3 and 4 respectively.

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 Introduction

Interpretation:

Whether the actual number of people were counted or not is 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 a 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.

A number with no uncertainty and that has a certain value is called an exact number. It has an infinite number of significant figures and does not limit or affect the number of significant figures in the final answer to the calculation.

(c)

Interpretation Introduction

Interpretation:

The actual number of people that could have been present at the game is 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 a 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 have 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, the exponential notation can be used to avoid confusion. For example, in 4300 has 3 significant figures. It can be expressed in scientific notation as 4.30×103 or

4.300×103. The number of significant figures in 4.30×103 and 4.300×103 is 3 and 4 respectively.

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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Answer 3

Question

Chapter 1, Problem 1.47P

(a)

Interpretation Introduction

Interpretation:

The significant figures in the given number 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 a 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 have 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, the exponential notation can be used to avoid confusion. For example, in 4300 has 3 significant figures. It can be expressed in scientific notation as 4.30×103 or

4.300×103. The number of significant figures in 4.30×103 and 4.300×103 is 3 and 4 respectively.

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 Introduction

Interpretation:

Whether the actual number of people were counted or not is 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 a 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.

A number with no uncertainty and that has a certain value is called an exact number. It has an infinite number of significant figures and does not limit or affect the number of significant figures in the final answer to the calculation.

(c)

Interpretation Introduction

Interpretation:

The actual number of people that could have been present at the game is 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 a 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 have 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, the exponential notation can be used to avoid confusion. For example, in 4300 has 3 significant figures. It can be expressed in scientific notation as 4.30×103 or

4.300×103. The number of significant figures in 4.30×103 and 4.300×103 is 3 and 4 respectively.

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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Answer 4

Question

Chapter 1, Problem 1.47P

(a)

Interpretation Introduction

Interpretation:

The significant figures in the given number 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 a 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 have 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, the exponential notation can be used to avoid confusion. For example, in 4300 has 3 significant figures. It can be expressed in scientific notation as 4.30×103 or

4.300×103. The number of significant figures in 4.30×103 and 4.300×103 is 3 and 4 respectively.

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 Introduction

Interpretation:

Whether the actual number of people were counted or not is 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 a 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.

A number with no uncertainty and that has a certain value is called an exact number. It has an infinite number of significant figures and does not limit or affect the number of significant figures in the final answer to the calculation.

(c)

Interpretation Introduction

Interpretation:

The actual number of people that could have been present at the game is 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 a 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 have 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, the exponential notation can be used to avoid confusion. For example, in 4300 has 3 significant figures. It can be expressed in scientific notation as 4.30×103 or

4.300×103. The number of significant figures in 4.30×103 and 4.300×103 is 3 and 4 respectively.

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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Answer 5

Chapter 1, Problem 1.47P

(a)

Interpretation Introduction

Interpretation:

The significant figures in the given number 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 a 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 have 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, the exponential notation can be used to avoid confusion. For example, in 4300 has 3 significant figures. It can be expressed in scientific notation as 4.30×103 or

4.300×103. The number of significant figures in 4.30×103 and 4.300×103 is 3 and 4 respectively.

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 Introduction

Interpretation:

Whether the actual number of people were counted or not is 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 a 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.

A number with no uncertainty and that has a certain value is called an exact number. It has an infinite number of significant figures and does not limit or affect the number of significant figures in the final answer to the calculation.

(c)

Interpretation Introduction

Interpretation:

The actual number of people that could have been present at the game is 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 a 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 have 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, the exponential notation can be used to avoid confusion. For example, in 4300 has 3 significant figures. It can be expressed in scientific notation as 4.30×103 or

4.300×103. The number of significant figures in 4.30×103 and 4.300×103 is 3 and 4 respectively.

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.

Answer 6

Chapter 1, Problem 1.47P

(a)

Interpretation Introduction

Interpretation:

The significant figures in the given number 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 a 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 have 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, the exponential notation can be used to avoid confusion. For example, in 4300 has 3 significant figures. It can be expressed in scientific notation as 4.30×103 or

4.300×103. The number of significant figures in 4.30×103 and 4.300×103 is 3 and 4 respectively.

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.

Answer 7

Chapter 1, Problem 1.47P

(a)

Interpretation Introduction

Interpretation:

The significant figures in the given number 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 a 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 have 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, the exponential notation can be used to avoid confusion. For example, in 4300 has 3 significant figures. It can be expressed in scientific notation as 4.30×103 or

4.300×103. The number of significant figures in 4.30×103 and 4.300×103 is 3 and 4 respectively.

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.

Answer 8

(b)

Interpretation Introduction

Interpretation:

Whether the actual number of people were counted or not is 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 a 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.

A number with no uncertainty and that has a certain value is called an exact number. It has an infinite number of significant figures and does not limit or affect the number of significant figures in the final answer to the calculation.

Answer 9

(b)

Interpretation Introduction

Interpretation:

Whether the actual number of people were counted or not is 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 a 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.

A number with no uncertainty and that has a certain value is called an exact number. It has an infinite number of significant figures and does not limit or affect the number of significant figures in the final answer to the calculation.

Answer 10

(c)

Interpretation Introduction

Interpretation:

The actual number of people that could have been present at the game is 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 a 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 have 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, the exponential notation can be used to avoid confusion. For example, in 4300 has 3 significant figures. It can be expressed in scientific notation as 4.30×103 or

4.300×103. The number of significant figures in 4.30×103 and 4.300×103 is 3 and 4 respectively.

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.

Answer 11

(c)

Interpretation Introduction

Interpretation:

The actual number of people that could have been present at the game is 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 a 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 have 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, the exponential notation can be used to avoid confusion. For example, in 4300 has 3 significant figures. It can be expressed in scientific notation as 4.30×103 or

4.300×103. The number of significant figures in 4.30×103 and 4.300×103 is 3 and 4 respectively.

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.

Answer 12

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Answer 13

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Answer 14

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Answer 15

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