(a)
Interpretation:
Number of significant digits in
Concept introduction:
An exact number is a completely certain number, that is, which can be counted. For example, 1 kilometer has exactly 1000 meters or 1 dozen has 12 number of items, which is also an exact number.
Exact numbers have infinite significant figures and zero error or uncertainty. Example 12 has infinite significant figures but 12.00 has 4 significant figures. To exactly determine the uncertainty in the final answer of measurement, significant figures are calculated.
The rules for counting significant figures will be as follows:
- Numbers that are non-zero are significant figures.
- The zeros preceding numbers that are non-zero are non-significant as they only define the place of decimal.
- The zeros in between numbers that are non-zero are also significant.
- The zeros after numbers that are non-zero are significant only if the decimal is present in the number.
(b)
Interpretation:
Number of significant digits in
Concept introduction:
An exact number is a completely certain number, that is, which can be counted. For example, 1 kilometer has exactly 1000 meters or 1 dozen has 12 number of items, which is also an exact number.
Exact numbers have infinite significant figures and zero error or uncertainty. Example 12 has infinite significant figures but 12.00 has 4 significant figures. To exactly determine the uncertainty in the final answer of measurement, significant figures are calculated.
The rules for counting significant figures will be as follows:
- Numbers that are non-zero are significant figures.
- The zeros preceding numbers that are non-zero are non-significant as they only define the place of decimal.
- The zeros in between numbers that are non-zero are also significant.
- The zeros after numbers that are non-zero are significant only if the decimal is present in the number.
(c)
Interpretation:
Number of significant digits in
Concept introduction:
An exact number is a completely certain number, that is, which can be counted. For example, 1 kilometer has exactly 1000 meters or 1 dozen has 12 number of items, which is also an exact number.
Exact numbers have infinite significant figures and zero error or uncertainty. Example 12 has infinite significant figures but 12.00 has 4 significant figures. To exactly determine the uncertainty in the final answer of measurement, significant figures are calculated.
The rules for counting significant figures will be as follows:
- Numbers that are non-zero are significant figures.
- The zeros preceding numbers that are non-zero are non-significant as they only define the place of decimal.
- The zeros in between numbers that are non-zero are also significant.
- The zeros after numbers that are non-zero are significant only if the decimal is present in the number.
d)
Interpretation:
Number of significant digits in
Concept introduction:
An exact number is a completely certain number, that is, which can be counted. For example, 1 kilometer has exactly 1000 meters or 1 dozen has 12 number of items, which is also an exact number.
Exact numbers have infinite significant figures and zero error or uncertainty. Example 12 has infinite significant figures but 12.00 has 4 significant figures. To exactly determine the uncertainty in the final answer of measurement, significant figures are calculated.
The rules for counting significant figures will be as follows:
- Numbers that are non-zero are significant figures.
- The zeros preceding numbers that are non-zero are non-significant as they only define the place of decimal.
- The zeros in between numbers that are non-zero are also significant.
- The zeros after numbers that are non-zero are significant only if the decimal is present in the number.
(e)
Interpretation:
Number of significant digits in
Concept introduction:
An exact number is a completely certain number, that is, which can be counted. For example, 1 kilometer has exactly 1000 meters or 1 dozen has 12 number of items, which is also an exact number.
Exact numbers have infinite significant figures and zero error or uncertainty. Example 12 has infinite significant figures but 12.00 has 4 significant figures. To exactly determine the uncertainty in the final answer of measurement, significant figures are calculated.
The rules for counting significant figures will be as follows:
- Numbers that are non-zero are significant figures.
- The zeros preceding numbers that are non-zero are non-significant as they only define the place of decimal.
- The zeros in between numbers that are non-zero are also significant.
- The zeros after numbers that are non-zero are significant only if the decimal is present in the number.
(f)
Interpretation:
Number of significant digits in
Concept introduction:
An exact number is a completely certain number, that is, which can be counted. For example, 1 kilometer has exactly 1000 meters or 1 dozen has 12 number of items, which is also an exact number.
Exact numbers have infinite significant figures and zero error or uncertainty. Example 12 has infinite significant figures but 12.00 has 4 significant figures. To exactly determine the uncertainty in the final answer of measurement, significant figures are calculated.
The rules for counting significant figures will be as follows:
- Numbers that are non-zero are significant figures.
- The zeros preceding numbers that are non-zero are non-significant as they only define the place of decimal.
- The zeros in between numbers that are non-zero are also significant.
- The zeros after numbers that are non-zero are significant only if the decimal is present in the number.

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Chapter 1 Solutions
LCPO CHEMISTRY W/MODIFIED MASTERING
- > You are trying to decide if there is a single reagent you can add that will make the following synthesis possible without any other major side products: 1. ☑ CI 2. H3O+ O Draw the missing reagent X you think will make this synthesis work in the drawing area below. If there is no reagent that will make your desired product in good yield or without complications, just check the box under the drawing area and leave it blank. Click and drag to start drawing a structure. Explanation Check ? DO 18 Ar B © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibilityarrow_forwardDon't use ai to answer I will report you answerarrow_forwardConsider a solution of 0.00304 moles of 4-nitrobenzoic acid (pKa = 3.442) dissolved in 25 mL water and titrated with 0.0991 M NaOH. Calculate the pH at the equivalence pointarrow_forward
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