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For the following scales (no units), determine the size of the increment, and then estimate the readings at the lines given to the appropriate number of digits. 1) 2) X 70 a) Increment: 60 b) Reading at X: c) Reading at Y: Answers to the Practice problems: 1) Increment: 2) X getugle Increment: 0.1 a) Increment: b) Reading at X: c) Reading at Y:

For the following scales (no units), determine the size of the increment, and then estimate the readings at the lines given to the appropriate number of digits. 1) 2) X 70 a) Increment: 60 b) Reading at X: c) Reading at Y: Answers to the Practice problems: 1) Increment: 2) X getugle Increment: 0.1 a) Increment: b) Reading at X: c) Reading at Y:

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Balances: We use top loader digital balances in this lab, and there are some important rules to follow so as to not damage them. Unless instructed otherwise, report all of the numbers displayed in the digital readout. a) Never move a balance or turn them off. b) Never put chemicals directly on a balance (use weighing paper or a container). c) Clean up any spilled chemicals immediately! Practice Problems: For the following scales (no units), determine the size of the increment, and then estimate the readings at the lines given to the appropriate number of digits. 1) 2) X 70 a) Increment: 60 b) Reading at X: c) Reading at Y: Answers to the Practice problems: 1) Increment: 1 Reading at X: 67.4 Reading at Y: 61.0 X D = M V 0.1 2) Increment: Reading at X: 7.74 Reading at Y: 7.10 8 7 a) Increment: b) Reading at X: c) Reading at Y: Density Introduction: Matter is anything that has a mass associated with it, as well as encompassing a particular volume. The more matter there is in a certain volume (i.e.: the more mass within that volume), the denser that matter is. So, the density of matter, D, is the mass of that matter, M, divided by its volume, V. Solids normally have densities recorded in units of g/cm³ whereas liquids are g/mL. Gases are much less dense than liquids or solids and so typically have densities given in units of g/L. Density is constant for a particular species, unless the temperature changes. Under thermal expansion, the volume of a species increases when it is heated or contracts when cooled. If the mass remains constant while the volume changes upon heating, then the density changes based on the equation above. In this experiment, the densities of various solids and liquids will be measured with the particular techniques used explained in each individual section (i.e.: regularly shaped vs. irregularly shaped solids vs. liquids). You will also be given an unknown liquid and are to determine its density as accurately as possible.
Transcribed Image Text:Balances: We use top loader digital balances in this lab, and there are some important rules to follow so as to not damage them. Unless instructed otherwise, report all of the numbers displayed in the digital readout. a) Never move a balance or turn them off. b) Never put chemicals directly on a balance (use weighing paper or a container). c) Clean up any spilled chemicals immediately! Practice Problems: For the following scales (no units), determine the size of the increment, and then estimate the readings at the lines given to the appropriate number of digits. 1) 2) X 70 a) Increment: 60 b) Reading at X: c) Reading at Y: Answers to the Practice problems: 1) Increment: 1 Reading at X: 67.4 Reading at Y: 61.0 X D = M V 0.1 2) Increment: Reading at X: 7.74 Reading at Y: 7.10 8 7 a) Increment: b) Reading at X: c) Reading at Y: Density Introduction: Matter is anything that has a mass associated with it, as well as encompassing a particular volume. The more matter there is in a certain volume (i.e.: the more mass within that volume), the denser that matter is. So, the density of matter, D, is the mass of that matter, M, divided by its volume, V. Solids normally have densities recorded in units of g/cm³ whereas liquids are g/mL. Gases are much less dense than liquids or solids and so typically have densities given in units of g/L. Density is constant for a particular species, unless the temperature changes. Under thermal expansion, the volume of a species increases when it is heated or contracts when cooled. If the mass remains constant while the volume changes upon heating, then the density changes based on the equation above. In this experiment, the densities of various solids and liquids will be measured with the particular techniques used explained in each individual section (i.e.: regularly shaped vs. irregularly shaped solids vs. liquids). You will also be given an unknown liquid and are to determine its density as accurately as possible.
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