CHEM 104 Final Exam With Correctly Solved Solutions 2024

CHEM 104 Final Exam With Correctly Solved Solutions 2024 Mixture - correct answer.a physical combination of two or more substances present in variable amounts Composition of Air - correct answer.78% Nitrogen, 21% Oxygen, 1% Argon and CO2 Air Particles unchanged by respiration? - correct answer.Nitrogen and Arg on Air Particles changed by respiration? - correct answer.Oxygen and CO2 Name 5 kinds of Air Pollutants - correct answer.Carbon Monoxide, Ozone, Sulfur Dioxide, Nitrogen Dioxide, Particulate Matter (dust, sand) Ozone Molecule - correct answer.O3 Ozone Pollutant - correct answer.Smelly gas that can cause breathing problems Air Quality Index - correct answer.Scale that ranks levels of ozone and other air pollutants (0 -500) 500=high Air Quality index for Healthy -Moderate Air - correct answer.0 -100 Atom - correct answer.Smallest particle of an element Molecule - correct answer.A group of atoms bonded together Classification of pure substances - correct answer.Elements and Compounds Compounds - correct answer.2 or more elements chemically combined; Comp letely the same chemical combination throughout Elements - correct answer.A molecule composed of one kind of atom; cannot be broken into simpler units by chemical reactions Inventor of Periodic Table - correct answer.Mendeleev What does an element's group tell us? - correct answer.Group is the vertical column. Tells us how many valence electrons are in the outer shell; tells us how reactive the element is Hydrocarbons - correct answer.Organic molecules consisting of only carbon and hydrogen. Have different prefixes than other molecules used for fuels Pneumonic for Hydrocarbon prefixed - correct answer.Mother Eats Peanut Butter Methane, Ethane, Propane, Cyclopropane Combustion - correct answer.Rapid reaction between oxygen and fuel that results in heat and light PPH to PPM conversion - correct answer.Move decimal four places to the right Types of Mixtures - correct answer.Heterogenous and Homogenous Heterogenous Mixture - correct answer.Mixture with uneven distribution of di fferent substances; not the same throughout Homogenous Mixture - correct answer.Mixture in which the composition is uniform throughout What do periods mean on the Periodic Table? - correct answer.How many valence shells there are Protons - correct answe r.Positively charged particles inside nucleus Neutrons - correct answer.Neutrally charged particles inside nucleus Electrons - correct answer.Negatively charged particles outside nucleus To be electronically stable, an atom must have an equal number of ___ and ___ - correct answer.Protons and Neutrons What does the Atomic number tell you? - correct answer.Number of protons in the nucleus. Always equal to the number of electrons (if stable) Alkali Metals Properties - correct answer.Highly reactive metals Halogens Properties - correct answer.Reactive non -metals Noble Gases Properties - correct answer.Un -reactive nonmetals Isotope - correct answer.Atoms of the same element that have differen t numbers of neutrons Mass Number - correct answer.Sum of the number of neutrons and protons in an atomic nucleus; tells you the isotopes How to get number of neutrons using the Periodic Table? - correct answer.Subtract atomic number from the mass number Valence Electrons - correct answer.The electrons in the outermost shell of an atom; these are the electrons involved in forming bonds Covalent Bond - correct answer.sharing a pair of electrons between atoms Ionic Bond - correct answer.Gaining/Losing an electron to another atom Which is stronger? Covalent or Ionic Bonds? - correct answer.Ionic AMU - correct answer.Atomic Mass per Unit; get from Mass Number on Periodic Table Covalent Bonds are only formed by ___ + ___ - correct answer.Two nonmetals Ionic Bonds are only formed by ___+___ - correct answer.One non -metal and one metal Wavelength - correct answer.Distance between successful peaks; Expressed in nanometers (nm) Frequency - correct answer.How many wave peaks pass a certain point per given time Fast/Shorter waves means... - correct answer.Higher frequency Long/Spread out waves means... - correct answer.Low Frequency Frequency is inversely related to...___ - correct answer.Wavelength Electromagnetic Spectrum - correct answer.The arrangement of waves of radiant energy in order of wavelength and frequency Types of light waves on the Electromagnetic Spectrum (From smallest to largest) - correct answer.(From smalles t to largest) Gamma, x -ray, UV, Visible, IR, Microwave, Radio (Smallest=Higher frequency, shortest wavelengths) Radiant Energy - correct answer.The entire collection of different wavelengths, each with own energy