(a) Interpretation: The given mass of 2.35 kg needs to be expressed in g. Concept introduction: A ‘unit of measurement’ is a standard that is used to express the quantity being measured. For example, the SI unit for measuring distance or length is meters (m). Mass is measured in terms of kilograms (kg). Conversion factors are numbers that convert one unit of measurement to the other without changing the actual value.
(a) Interpretation: The given mass of 2.35 kg needs to be expressed in g. Concept introduction: A ‘unit of measurement’ is a standard that is used to express the quantity being measured. For example, the SI unit for measuring distance or length is meters (m). Mass is measured in terms of kilograms (kg). Conversion factors are numbers that convert one unit of measurement to the other without changing the actual value.
Solution Summary: The author explains the concept of a ‘unit of measurement’, which is used to express the quantity being measured.
The given mass of 2.35 kg needs to be expressed in g.
Concept introduction:
A ‘unit of measurement’ is a standard that is used to express the quantity being measured.
For example, the SI unit for measuring distance or length is meters (m).
Mass is measured in terms of kilograms (kg).
Conversion factors are numbers that convert one unit of measurement to the other without changing the actual value.
Interpretation Introduction
(b)
Interpretation:
The given mass of 792 g needs to be expressed in kg.
Concept introduction:
A ‘unit of measurement’ is a standard that is used to express the quantity being measured. For example: The SI unit for measuring distance or length is meters (m).
Mass is measured in terms of kilograms (kg).
Conversion factors are numbers that convert one unit of measurement to the other without changing the actual value.
Interpretation Introduction
(c)
Interpretation:
The given distance of 3869 mm needs to be expressed in cm.
Concept introduction:
A ‘unit of measurement’ is a standard that is used to express the quantity being measured. For example: The SI unit for measuring distance or length is meters (m).
Mass is measured in terms of kilograms (kg).
Conversion factors are numbers that convert one unit of measurement to the other without changing the actual value.
Interpretation Introduction
(d)
Interpretation:
The given distance of 0.043 cm needs to be expressed in m.
Concept introduction:
A ‘unit of measurement’ is a standard that is used to express the quantity being measured. For example: The SI unit for measuring distance or length is meters (m).
Mass is measured in terms of kilograms (kg).
Conversion factors are numbers that convert one unit of measurement to the other without changing the actual value.
Propagation of uncertainty. You have a stock solution certified by the manufacturer to contain 150.0±0.03 µg SO42-/mL. You would like to dilute it by a factor of 100 to obtain 1.500 µg/mL. Calculate the uncertainty in the two methods of dilution below. Use the following uncertainty values for glassware:
Glassware
Uncertainty
(assume glassware has been calibrated and treat the values below as random error)
1.00 mL volumetric pipet
0.01 mL
10.00 mL volumetric pipet
0.02 mL
100.00 mL volumetric flask
0.08 mL
Transfer 10.00 mL with a volumetric pipet and dilute it to 100 mL with a volumetric flask. Then take 10.00 mL of the resulting solution and dilute it a second time with a 100 mL flask.
2. Transfer 1.00 mL with a volumetric pipet and dilute it to 100 mL with a volumetric flask.
Draw all resonance structures for the following ion:
CH₂
Draw all resonance structures on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars, including
charges where needed. The single bond is active by default.
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What is the average mass of the 10 pennies? Report your value with correct significant figures.
What is the error (uncertainty) associated with each mass measurement due to the equipment?
What is the uncertainty associated with the average value? Note that the uncertainty of the balance will propagate throughout the calculation.
What is the standard deviation of the 10 mass measurements?
Explain the difference between the propagated uncertainty and the standard deviation. Which number would you use to describe the uncertainty in the measurement?
Calculate the total mass of the pennies with associated uncertainty.
Calculate the average density of a penny based on these data. Propagate the uncertainty values for both mass and volume in your calculations.
Chapter 1 Solutions
General Chemistry: Principles And Modern Applications Plus Mastering Chemistry With Pearson Etext -- Access Card Package (11th Edition)
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