Unfortunately, the student may have made some mistakes. Examine his results carefully and tick the box next to the incorrect quantity in each row, if any. Note: If there is a mistake in a row, only one of the three quantities listed is wrong. Also, you may assume the number of significant digits in each quantity is correct.

Unfortunately, the student may have made some mistakes. Examine his results carefully and tick the box next to the incorrect quantity in each row, if any. Note: If there is a mistake in a row, only one of the three quantities listed is wrong. Also, you may assume the number of significant digits in each quantity is correct.

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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2. Do the following calculations and use the correct number of significant figures in your answers. Assume all numbers are the results of measurements. a. 0.208 + 4.9 + 1.11 b. 228 + 0.999 + 1.02 c. 8.543 − 7.954 d.(3.2 × 10−2) + (5.5 × 10−1) (hint: Write in the decimal form first, then add.) e. 336.86 − 309.11 f. 21.66 − 0.02387
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A brick of a certain metal has area on top of 3.54 cm x 6.93 cm. It has mass 921 g. How high is the brick in cm? The metal has density of 10.6 g/cm3 2.54 cm 1 inch Ixhxw V V= m/d You need to combine the above equations; this is a typical math skill you need in chemistry. You need to write your answer in the box with one number past the decimal. Please don't worry about the sig figs in this case--in these formula problems, the Canvas software will give a variety of questions and each student gets their data with different sig figs. So l just have to choose and sometimes it might seem that one past the decimal is not the correct sig figs. Nonetheless, you have to follow that direction. For the same reason, your brick may seem to be odd shaped-- please don't worry about t.
References Use the References to access important values if needed for this question. When 52.7 and 84.3 are multiplied, the answer should be reported to significant digit(s). The product reported to the correct number of significant digits is Use scientific notation to express your answer. The sum of 52.7 and 84.3 should be reported with the decimal point. The sum reported to the correct number of decimal places is Submit Answer digit(s) after
A solution is prepared by dissolving 7.871 mL of ethanol in 76.454 mL of water. What volume (in mL) of ethanol is present in 145.692 mL of this solution? Provide your response to two digits after the decimal.
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A Chemistry 20 student uses a thermometer and a hot plate and measures the boiling point of ethyl alcohol to be 71.1 °C. Then, she looks in a reference book and finds that the actual boiling point of ethyl alcohol is 78.4 °C. What is her percent error? Do not show your work in the space provided. Record only your final answer with the correct number of significant digits and the proper units.
Since density depends on the mass and volume of an object, we need both of these values combined in the correct way to solve for density. Keep in mind that we may not be given the mass and volume directly, or the values may not be given in the units we want and we need to convert to the correct units before solving for density. When converting between metric units, use the prefixes to help you determine the magnitude of a value. The prefix k indicates kilo, 1000. Therefore 1000 g = 1 kg. A 17.0 kg iron weightlifting plate has a volume of 2160 cm³ . What is the density of the iron plate in g/cm³? Express your answer in grams per cubic centimeter to three significant figures. • View Available Hint(s) Hνα ΑΣφ ? density of iron plate = g/cm3
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I don't understand the wording. The least significant digit means the last digit? 7.700 X 2.1 = 16.17 would the uncertainty be 0.01 ? 2.132 + 17 + 4.04 = 23.172 would the uncertainty be 0.001 ?