CHEM-120 CHAMBERLAIN FINAL EXAM| 526 QUESTIONS| WITH COMPLETE SOLUTIONS

Chemistry correct answer: The study of the properties of matter and how matter changes Basic Unit in Chemistry correct answer: atom Types of Chemistry correct answer: Green Chemistry Sustainable Chemistry green chemistry correct answer: uses materials and processes that are intended to prevent or reduce pollution at its source replacing rare hazardous with more abundant less hazardous Example of green chemistry correct answer: replacement of mercury fluorescent light bulbs with efficient mercury free light bulbs Green Chemistry Solar Fuels correct answer: sunlight is abundant source of energy plants store solar energy as chemical energy via photosynthesis artificial photosynthesis correct answer: can be used to generate hydrogen fuel H fuel can then be reacted with O to produce heat and electricity water----hydrogen + oxygen sustainable chemistry correct answer: designed to meet the needs of the present generation without compromising the needs of future generations Matter correct answer: Anything that has mass and takes up space mass correct answer: A measure of the amount of matter in an object weight correct answer: A measure of the gravitational force exerted on the matter of an object. Classes of Matter correct answer: Solids, Liquids, Gas Solid correct answer: Definite shape and volume vibration ice, brick, wood, liquid correct answer: A state of matter that has no definite shape but has a definite volume. move in irregular pattern petrol, vinegar, paint, water gas correct answer: A state of matter with no definite shape or volume freely move continuously- far apart helium, oxygen, carbon monoxide, hydrogen melting point correct answer: The temperature at which a solid becomes a liquid Vaporation correct answer: Liquid to gas boiling Point correct answer: temp at which liquid escapes and becomes a gas condensation correct answer: Gas to liquid freezing correct answer: liquid to solid occurs at freezing point/same as melting point Sublimation correct answer: A change directly from the solid to the gaseous state without becoming liquid Ex: dry ice 2 categories of matter correct answer: substances and mixtures Substance correct answer: A single kind of matter that is pure and has a specific set of properties. Substance contains correct answer: Elements and Compounds Elements correct answer: A molecule composed of one kind of atom; cannot be broken into simpler units by chemical reactions. represented by chemical groups: Cl, H, Mg Compounds correct answer: 2 or more elements chemically combined many exist as groups of atoms bonded together as molecules