Cem 141 msu exam - Study guides, Class notes & Summaries

CEM 141 MSU Exam 1 Questions & Answers 2024/2025 The statement "If I add cold milk to hot coffee the temperature will decrease," is a? - ANSWERSClaim, always include an explanation and reasoning to the claim. Scientific Model - ANSWERSModels are used to make testable predictions How much is a picometer? - ANSWERS0.1 x 10^-12 meters Atomic Force Microscopy/ Scanning Tunneling Microscopy - ANSWERSMicroscopes that now allows us to view atoms. Leaves are green in the summer becaus...

CEM 141 MSU Exam 1 Quizzes & Ans!!

CEM 141 MSU Exam 3 UPDATED Exam Questions and CORRECT Answers T/F: Covalent bonds are present only when atomic orbitals interact constructively. - Correct ANSWER- True. Binding in Diamond - Correct ANSWER- Each carbon forms 4 bonds to 4 identical carbons; tetrahedral; sp3 Valence Bond Theory - Correct ANSWER- The idea that covalent bonds are formed when orbitals of different atoms overlap. T/F: Electrons are localized in molecular orbital. - Correct ANSWER- False

CEM 141 MSU Exam 1 Questions With 100% Correct Answers.

Which reaction requires the most energy? A. N(g) → N+(g) + e - B. N+(g) → N2+(g) + e - C. F(g) → F+(g) + e - D. F+(g) → F2+(g) + e - - Answer-D. F+(g) → F2+(g) + e - Fluorine has a higher effective nuclear charge than Nitrogen - so it is harder to remove an electron (takes more energy because the electron is more strongly attracted by the nucleus). Effective nuclear charge is the same for F and F+ because the number of protons and core electrons are not changed. However, when t...

CEM 141 MSU Exam 3

CEM 141 MSU Exam 1 UPDATED Exam Questions and CORRECT Answers The statement "If I add cold milk to hot coffee the temperature will decrease," is a? - Correct ANSWER- Claim, always include an explanation and reasoning to the claim. Scientific Model - Correct ANSWER- Models are used to make testable predictions How much is a picometer? - Correct ANSWER- 0.1 x 10^-12 meters Atomic Force Microscopy/ Scanning Tunneling Microscopy - Correct ANSWER- Microscopes that now allows us to view at...

The statement "If I add cold milk to hot coffee the temperature will decrease," is a? - Answer-Claim, always include an explanation and reasoning to the claim. Scientific Model - Answer-Models are used to make testable predictions How much is a picometer? - Answer-0.1 x 10^-12 meters Atomic Force Microscopy/ Scanning Tunneling Microscopy - Answer-Microscopes that now allows us to view atoms. Leaves are green in the summer because? - Answer-A plant's leaves are green in the summer becaus...

Ionization Energy - Answer-energy required to remove an electron from an atom in the gas phase Left Side Electrons - Answer-have weaker attractions to remove electrons *easier to remove electrons from the left side of the table than the right side* Does it take MORE or LESS energy to remove an electron from Li than from Na? - Answer-MORE Why? Because as we move down a group, the orbitals become larger and weaker. While going across the effective nuclear charge increases. (holds onto the ele...

CEM 141 MSU Exam 3 PASSED Exam Questions and CORRECT Answers Ionization Energy - Correct ANSWER- energy required to remove an electron from an atom in the gas phase Left Side Electrons - Correct ANSWER- have weaker attractions to remove electrons *easier to remove electrons from the left side of the table than the right side* Does it take MORE or LESS energy to remove an electron from Li than from Na? - Correct ANSWER- MORE Why? Because as we move down a group, the orbitals become la...