University Of Houston - Main Campus

CheE: Stiochiometry avagadro's number - 6.02x10(to the power of 23)- the number of atoms or molecules in a mole conversion factor - a ratio of values used to express the same quantity in different units mola mass - the mass in grams of one mole of any pure substance mole - the SI base unit for the amount of a substance mole ratio - in a balanced equation, the ratio between the numbers of moles of any two substances (the coefficient ratio) stoichiometry - the study of quantit...

CheE:Physical Change vs Chemical Change Frying an egg - correct answerchemical hammering a nail into a board - correct answerphysical slicing a banana - correct answerphysical boiling water - correct answerphysical evaporating alcohol or water - correct answerphysical burning toast - correct answerchemical rusting bike - correct answerchemical

CHEM/CheE :What is Matter - Compounds, Molecules and Chemistry Chemistry - correct answer the study of matter and how it changes Compound - correct answer A substance made of two or more elements that are chemically combined in a set ratio Molecule - correct answer A group of 2 or more atoms held together by chemical bonds Chemical Formula - correct answer represents the elements and number of atoms that make up a molecule or compound Chemical Equation - correct answer the ...

CheE Chemical Bonding & Reactions Vocabulary chemical bond - correct answerthe force that holds two atoms together ionic bond - correct answerFormed when one or more electrons are transferred from one atom to another covalent bond - correct answerA chemical bond that involves sharing a pair of electrons between atoms in a molecule Cation - correct answerA positively charged ion Anion - correct answerA negatively charged ion nomenclature - correct answertechnical names or nami...

CheE Chemical Reactions, Types of Chemical Reactions precipitate - correct answer Solid compound produced from 2 liquids during a chemical reaction. Sign of a chemical reaction. bubbles - correct answer Gas given off during a chemical reaction; may or may not have an odour. Sign of a chemical reaction. signs of a chemical reaction - correct answer change in temperature, formation of bubbles, precipitate forms, color change, change in smell, difficult to reverse subscript - co...

Physical property - correct answerA characteristic of a pure substance that can be observed without changing it into another substance melting point - correct answerThe temperature at which a solid becomes a liquid boiling point - correct answerThe temperature at which a liquid boils, changing from a liquid to a gas density - correct answerrelationship between mass and volume of a substance, unchanged by size of matter chemical property - correct answera property of matter that descr...

CheE: TCI Qtr 2 MATTER Vocab Review Periodic table of the elements - correct answerA table that classifies elements by their physical and chemical properties; rows are called periods; columns are called groups; Constraint - correct answer1. A limit to a design process. Constraints may be such things as appearance, funding, space, materials, and human capabilities. 2. A limitation or restriction. element - correct answerfundamental building blocks of matter; A pure substance made of on...

CheE Understanding Chemical Reactions (MGH 12.1) Set 2 chemical symbol - correct answerone or two letters used to represent chemical elements; first is always uppercase subscript - correct answera number in a chemical formula that tells the amount of atoms in a molecule; small number to the bottom right of the chemical symbol coefficient - correct answera number in front of a chemical formula in an equation that indicates how many molecules or atoms of substance are involved in a reac...

CHEE Unit 3: Conservation of Mass endothermic reaction - correct answerA reaction that ABSORBS energy in the form of heat exothermic reaction - correct answera chemical reaction in which heat is released to the surroundings conservation of mass - correct answerthe principle stating that matter is not created or destroyed during a chemical reaction Mass - correct answerthe total number of particles in a system Molecule - correct answerA group of atoms bonded together Coefficie...

CheE Chemical Changes and Chemical Reactions atom - correct answerthe smallest particle of an element element - correct answerthe simplest form of a substance - made of identical atoms, always found on the periodic table molecule - correct answertwo or more atoms bonded together, if atoms are of different elements, it is the smallest particle of a compound compound - correct answera pure substance made from atoms of two or more different elements chemically combined/bonded together...