These are homework exercises to accompany the Textmap created for Chemistry: A Molecular Approach by Nivaldo Tro. Complementary General Chemistry question banks can be found for other Textmaps and can be accessed here. In addition to these publicly available questions, access to private problems bank for use in exams and homework is available to faculty only on an individual basis; please contact Delmar Larsen for an account with access permission.
1. How many protons, neutrons and electrons are present in one atom of the following:
2. What is the Atomic Weight of chlorine given that: a. The exact mass of 35Cl is 34.9689 and the relative abundance is 75.53% b. The exact mass of 37Cl is 36.9659 and the relative abundance is 24.47% c. Is this the answer that you expected?
3. What is the Atomic Weight of ruthenium given the following information from WebElements, www.webelements.com. Is this the answer that you expected? Isotope Abundance Exact Mass 96Ru 5.54% 95.907599 98Ru 1.87% 97.905287 99Ru 12.76% 98.9059389 100Ru 12.60% 99.9042192 101Ru 17.06% 100.9055819 102Ru 31.55% 101.9043485 104Ru 18.62% 103.905424
4. Use the mass spectrum for chromium given below to determine the