< 2:24 STARTING AMOUNT A toy top has a mass of 32.0 g Cu How many atoms Cu are in this spinning top, given that the average atomic mass of copper is 63.55 g/mol Cu? ADD FACTOR X() 3.38 x 10-24 6.022 x 1024 3.03 x 10²4 1.93 x 1025 1 63.55 6.022 x 10²3 3.03 1.22 x 10²7 3.03 x 10²3 Question 6 of 44 3.38 x 10-21 32.0 X = ANSWER g Cu g/mol Cu atoms Cu mol Cu Submit Tap here or pull up for additional resources RESET 3

< 2:24 STARTING AMOUNT A toy top has a mass of 32.0 g Cu How many atoms Cu are in this spinning top, given that the average atomic mass of copper is 63.55 g/mol Cu? ADD FACTOR X() 3.38 x 10-24 6.022 x 1024 3.03 x 10²4 1.93 x 1025 1 63.55 6.022 x 10²3 3.03 1.22 x 10²7 3.03 x 10²3 Question 6 of 44 3.38 x 10-21 32.0 X = ANSWER g Cu g/mol Cu atoms Cu mol Cu Submit Tap here or pull up for additional resources RESET 3

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

Chapter3: Stoichiometry

Section: Chapter Questions

Problem 191IP: With the advent of techniques such as scanning tunneling microscopy, it is now possible to write...

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With the advent of techniques such as scanning tunneling microscopy, it is now possible to write with individual atoms by manipulating and arranging atoms on an atomic surface. a. If an image is prepared by manipulating iron atoms and their total mass is 1.05 1020 g, what number of iron atoms were used? b. If the image is prepared on a platinum surface that is exactly 20 platinum atoms high and 14 platinum atoms wide, what is the mass (grams) of the atomic surface? c. If the atomic surface were changed to ruthenium atoms and the same surface mass as determined in part b is used, what number of ruthenium atoms is needed to construct the surface?
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A reagent occasionally used in chemical synthesis is sodium-potassium alloy. (Alloys are mixtures of metals, and Na-K has the interesting property that it is a liquid.) One formulation of the alloy (the one that melts at the lowest temperature) contains 68 atom percent K; that is, out of every 100 atoms, 68 are K and 32 are Na. What is the mass percent of potassium in sodium-potassium alloy?
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