General, Organic, and Biological Chemistry (3rd Edition)
3rd Edition
ISBN: 9780134042428
Author: Laura D. Frost, S. Todd Deal
Publisher: PEARSON
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Chapter 1, Problem 1.99AP
A student is weighing a standard 5.00 g weight four times on two different balances to check them for accuracy and precision. The following shows the data:
| Trial | Balance A | Balance B |
| 1 | 4.2 g | 5.1 g |
| 2 | 4.1 g | 4.9 g |
| 3 | 4.3 g | 4.7 g |
| 4 | 4.2 g | 5.2 g |
Which of the balances is more accurate? Which is more precise?
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You are given four values (1.033, 4.157, 1.05, and 4.6) and asked to conduct calculations on them. You perform a series of mathematical operations using the values and make a table that includes the calculated value as displayed on your
calculator:
Mathematical operation
Value displayed by calculator
1.033 +4.157 +1.05+4.6
10.8400
1.033 x 1.05
1.08465
4.157 - 1.05
3.10700
4.157/31.0341
0.133949
4.6/31.0341
0.148224
Round each of the values displayed by the calculator to the correct number of significant figures, and place the value in the bin that correctly indicates the number of significant digits you rounded to.
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10.8400
1.08465
3.10700
0.133949
0.148224
1 significant figure
2 significant figures
3 significant figures
4 significant figures
A student pipetted 10 mL of a sample solution into a 250 mL volumetric flask and diluted it to the mark with distilled water. The student then, pipetted 10 mL of this new solution into a 50.00 mL volumetric flask and diluted it to the mark with water. What is the dilution factor of the final solution?
25X
100X
125X
5X
50X
A student decided to undertake a balance calibration exercise during a lab session involving burette calibration. He found the apparent weight of calcium carbonate in air to be 100 grams and density to be 1.33g/mL. Assume that the standard steel weight used in the calibration has a density of 8.0g/mL and air has a density of 0.0012g/mL. What would be the true mass of the calcium carbonate sample?
Chapter 1 Solutions
General, Organic, and Biological Chemistry (3rd Edition)
Ch. 1 - Classify each of the following mixtures as...Ch. 1 - Classify each of the following mixtures as...Ch. 1 - Classify each of the following substances as a...Ch. 1 - Classify each of file following substances as a...Ch. 1 - Classify each of die following as an element or...Ch. 1 - Classify each of the following as an element or a...Ch. 1 - Use the periodic table to supply the missing...Ch. 1 - Use the periodic table to supply the missing...Ch. 1 - Identify and give the number of each element in...Ch. 1 - Identify and give the number of each element in...
Ch. 1 - Give the number of significant figures in each of...Ch. 1 - Give die number of significant figures in each of...Ch. 1 - Complete each of the following calculations and...Ch. 1 - Complete each of the following calculations and...Ch. 1 - A typical aspirin tablet contains 325 mg of the...Ch. 1 - On average, an adults lung volume is 5 L. Convert...Ch. 1 - Prob. 1.17PPCh. 1 - Write scientific notation for the following...Ch. 1 - Express the following numbers in a decimal form:...Ch. 1 - Express the following numbers in a decimal form:...Ch. 1 - Express the following numbers as a percent. Report...Ch. 1 - Express the following numbers as a percent. 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Professor F has a class with 50...Ch. 1 - Prob. 1.83APCh. 1 - An adult human femur weighs about 225 g and has a...Ch. 1 - The specific gravity of olive oil is 0.703. How...Ch. 1 - Prob. 1.86APCh. 1 - To keep a room comfortable, the air is heated or...Ch. 1 - On the Kelvin scale, the lower limit of the...Ch. 1 - Prob. 1.89APCh. 1 - Prob. 1.90APCh. 1 - A cup of yogurt contains 130 Calories. Calculate...Ch. 1 - Prob. 1.92APCh. 1 - Prob. 1.93APCh. 1 - Prob. 1.94APCh. 1 - Prob. 1.95APCh. 1 - Prob. 1.96APCh. 1 - Prob. 1.97APCh. 1 - Prob. 1.98APCh. 1 - A student is weighing a standard 5.00 g weight...Ch. 1 - Prob. 1.100APCh. 1 - A mother calls you to ask about a proper dosage of...Ch. 1 - A prescription for amoxicillin comes in an oral...Ch. 1 - A patient needs exactly 1000 mL of a fluid over a...Ch. 1 - Prob. 1.104APCh. 1 - How does the arrangement of particles in a liquid...Ch. 1 - Prob. 1.106APCh. 1 - Identify each of the following as a physical...Ch. 1 - Prob. 1.108APCh. 1 - Add coefficients to balance the chemical equations...Ch. 1 - Prob. 1.110APCh. 1 - If red spheres represent oxygen atoms and blue...Ch. 1 - Prob. 1.112APCh. 1 - To donate blood, your blood must have a density...Ch. 1 - Prob. 1.114CPCh. 1 - A physician orders a Heparin drip at 8.0 units per...Ch. 1 - The following equation shows the reaction of...Ch. 1 - Table sugar (C12H22O12) is completely dissolved in...Ch. 1 - We know high density lipoprotein (HDL) and low...Ch. 1 - Prob. 1IA.1QCh. 1 - Can an element be a pure substance? 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