University of New England (UNE )

This document contains a detailed set of Actual questions and verified answers for the University of New England CHEM 1011 midterm exam. It covers key topics such as intermolecular forces, thermodynamics, solutions, kinetics, equilibrium, and reaction mechanisms. The material is organized by weekly topics, making it useful for structured revision and concept reinforcement. It closely follows course quizzes and includes explanations that help clarify core chemistry principles.

Name the weakest to strongest dipole interactions - Answer induced dipole-induced dipole, dipole-induced dipole, dipole dipole Describe the characteristics of an endothermic reaction - Answer 1. reactions in which there is a net absorption of energy 2. positive sign 3. potential energy of the product is larger than the reactant Describe the characteristics of an exothermic reaction - Answer 1. reactions in which there is a net release of energy 2. negative sign 3. pot...

density - Answer mass/volume Heterogenous mixture - Answer composition is not uniform throughout (ex. mixed nuts) homogeneous mixture - Answer A mixture in which substances are evenly distributed throughout the mixture (ex. chocolate milk) Solvent - Answer the substance in which the solute dissolves Solute - Answer A substance that is dissolved in a solution. missible - Answer liquids that dissolve freely in one another in any proportion (solubl...

Molecule - Answer A unit of matter that results when 2 or more atoms are joined by covalent bonds (share electrons). Ionic Bond - Answer A bond resulting from a complete transfer of one of more electrons from one atom to another, resulting in the formation of 2 charged particles (ions). The electrostatic attraction of a cation (loses electrons, + charge, roman numerals) for an anion (gains electron, - charge). Nonpolar Covalent Bond - Answer Simple Answer: 2 atoms evenly ...

Cation - Answer positive ion Anion - Answer negative ion Ionic compound - Answer A compound that consists of positive and negative ions ionic bond - Answer A chemical bond resulting from the attraction between oppositely charged ions. Isotropic - Answer The same in all directions binary ionic compound - Answer a compound composed of the ions of one metal element and ions of on non-metal element, joined by ionic bonds NH4+ - Answer Ammon...

periodic table of the elements - Answer conversion factors - Answer 2.54 cm = 1 in 1 ml = 1cm(cubed) 1 cal = 4.184 J/g (degree) C Fahrenheit and K conversion - Answer 9/5 = 1.8 some metals that form more than one positive ion - Answer look at phone one of the most important parts of the scientific method is to identify "holes" in current models, and then working to improve the model. - Answer TRUE Some scientific models are the same as realit...

Which of the following represents a physical change in matter? a. a substance changes color when exposed to air b. a substance produces a gas and a solid when heated c. a substance burns when heated d. a substance solidifies at 443 K - Answer d. a substance solidifies at 443 K Which of the following terms correctly applies to a molecule of CO2? a. diatomic, heteroatomic b. polyatomic, diatomic c. triatomic, homoatomic d. triatomic, heteroatomic - Answer d. triatomi...

What is reduction? - Answer The gain of electrons If I have a diagram and the light molecule becomes negative and the dark molecule becomes positive which atom is being oxidized - Answer only the darker one because it becomes more positive as it loses electrons In the following half reaction, 2NA ---- 2NA+, how many electrons are gained or lost? - Answer 2 electrons are lost because the NA became more positive therefore it lost electrons Which materials is most likely ...

Which of the following is true about the scientific process? - Answer Science is the process of gathering knowledge about the natural world. After testing and refining many ideas, scientists often develop a comprehensive model that explains why things behave as they do. This type of model is best referred to as a(n): - Answer theory Scientific thinking began when: - Answer people became skeptical of their explanations and turned to experimentation Which of the followin...

Compounds - Answer a pure substance that is made up of two or more different types of atoms in a fixed, characteristic, chemical combination. Elements - Answer is composed of many atoms of the same type. Mixtures - Answer a mixture is a material made up of two or more different substances which are physically combined Periodic Table - Groups vs Periods - Answer A period is a horizontal row of the periodic table. There are a total of 7 periods. A group is a verti...