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Chapter 1 Solutions
Principles of Modern Chemistry
- The density of aluminum is 2.7 g/cm3; that of silicon is 2.3 g/cm3. Explain why Si has the lower density even though it has heavier atoms.arrow_forward13arrow_forwardデジタル形式で段階的に解決 ありがとう!! SOLVE STEP BY STEP IN DIGITAL FORMAT Structure of Metal Materials: 8. A colleague calculated the density of iron with BCC structure using the following data of atomic radius equal to 1.24 Angstrom and atomic weight of 55.85 as follows: p = [(4 atoms / C. U.) x (55.85 g/atomic weight)/(atoms/atomic weight) / [2(1.24x108 cm)/√2]³ p = 68.8 g/cm³ Is the result obtained logical? Explain and justify your answer.arrow_forward
- Gold has 79 electrons per atom and an atomic mass of 197 u. Part A What is the total charge of all the electrons in 3.1-kg bar of gold? Express your answer to two significant figures and include the appropriate units. µA a xa х.10п b Qtotal = Value Units Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Check your signs. Part B What is the net charge of the bar? Express your answer with the appropriate units. Qnet = Value Units Submit Request Answerarrow_forwardFor I = 3, which is not a possible value of L₂? 00 O None of the given choices. ○ 3ħ oħi ○ 2ħarrow_forwardAn average human weighs about 650 N For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Force between two point charges. ▼ Part A If two such generic humans each carried 1.5 C coulomb of excess charge, one positive and one negative, how far apart would they have to be for the electric attraction between them to equal their 650 N weight? Express your answer in kilometers. ΠΡΑΣΦ T= Submit Request Answer Constants kmarrow_forward
- A friend tells you that the “neon” in neon signs is a compound of neon and aluminum. Can your friend be correct? Explain.arrow_forwardPlease help me with this question! What would be the correct answers?arrow_forward2. THE FORCE BETWEEN TWO CHARGES IS 1000 N. ONE HAS A CHARGE OF 2X 10-5 C, AND THE OTHER HAS A CHARGE OF 5 X 10 C. WHAT IS THE DISTANCE BETWEEN THEM?arrow_forward
- Please, give simple words explenation. Additional examples very helpful. Please, write the answer clear or typed. Thank you Ionic radii Why is there an overall contraction in ionic radii? Why is radius of Ti^ 2+ less than theoretical value? Why is the radius of Cr^ 2+ larger than that of V^ 2+.arrow_forwardFor a Hydrogen Atom these energies can be calculated by the following equation: 1 Latulan he - - ATelacirun- R n Ru-2.179 x 10-18J (Hydrogen atom) The Helium Ion, Het, has energy levels similar to those of the hydrogen atom. The helium ion, like the hydrogen atom, has only one electron. This eliminates electron-electron interactions, and allows us to calculate the energies of the electron in each of the energy levels (n = 1, 2, 3 .) of the helium ion: 8.7149 x 10-18J Eçloetron - RH - 8.7149 x 1018J n (Helium Iou) The energy released as a photon (Ephoton), when the electron in the helium ion (He*) transitions from higher energy levels to lower energy levels in the ion, can be calculated by the equation: 1 + Ephoton - hc -- AEelectron - RHet ----- n? (Helitun Ion) 1 8.7149 x 1018J. n ni) (Helium Ion) Calculate the electron energies (Eelectron) of the first 4 energy levels in the helium ion (He*): n = [ Select ] x 10-18 J n2 = [ Select] v x 10-18 J n3 = [ Select] v x 1018 J n4 = [ Select)…arrow_forwardSuppose a system of two particles, represented by circles, have the possibility of occupying energy states with 0, 10, or 20 J. Collectively, the particles must have 20 J of total energy. One way the two particles can distribute themselves is: 20 J 10 J 00 0 J Are there any other energetically equivalent configurations? Give your answer in the form (x;y) in Joules without the units. If there is more than one answer, separate them by commas. If there is no answer, enter none. (0:20).(20;0) Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remainingarrow_forward
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- Chemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStax