Pure platinum is too soft to be used in jewelry because it scratches easily. To increase the hardness so that it can be used injewelry, platinum is combined with other metals to form an alloy. To determine the amount of platinum in an alloy, a 7.116 gsample of an alloy containing only platinum and cobalt is reacted with excess nitric acid to form 1.89 g of cobalt(II) nitrate.Calculate the mass percent of platinum in the alloy.mass percent:% Pt

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sample of an alloy containing only platinum and cobalt is reac Calculate the mass percent of platinum in the alloy.

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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Question

Pure platinum is too soft to be used in jewelry because it scratches easily. To increase the hardness so that it can be used in
jewelry, platinum is combined with other metals to form an alloy. To determine the amount of platinum in an alloy, a 7.116 g
sample of an alloy containing only platinum and cobalt is reacted with excess nitric acid to form 1.89 g of cobalt(II) nitrate.
Calculate the mass percent of platinum in the alloy.
mass percent:
% Pt

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