Homogenous mixtures - Study guides, Class notes & Summaries

Chemistry definition correct answers Study of structure, properties, transformations of matter Matter correct answers Anything that has mass + takes up space Phases: solid, liquid, gas Condensed phases = solids + liquids Intermolecular Forces (IMF) correct answers = Interactions between molecules/atoms/ions Solution correct answers = Homogenous mixtures of 2+ pure substances In a solution, the solute is dispersed uniformly throughout the solvent - Solute = compound(s) in lesse...

CHMM EXAM WITH 100% CORRECT ANSWERS Bioaccumulation - correct answerImplies the accumulation of a toxic chemical in tissue, like DDT and PCBs that are stored in fatty tissues or mercury building up in fish Biomagnification - correct answerthe increase of of the chemicals in the natural food chain as contaminated food species are eaten, like fish consumers that have high bloodstream from seafood sources Bioconcentration - correct answerused in the field of aquatic toxicology and is t...

How many steps are there in the scientific method? - ANSWER-5 What are the 5 steps to scientific method? - ANSWER-1. make an observation 2. ask a question 3. form a hypothesis 4. conduct an experiment 5. analyze the data and draw a conclusion What is a physical change? - ANSWER-A change in the size and shape of an object and no new substance is formed. What is a chemical change? - ANSWER-Any change that forms a new substance. What are the 3 phase changes? - ANSWER-boiling, conden...

How can matter be classified? Matter: Purity: 1. Pure Substances A. Elements B. Compounds 2. Mixtures A. Homogenous Solutions B. Heterogenous Solutions

Mixtures - Variable Composition Pure Substances - Constant Composition Homogenous Mixture - A mixture in which the composition is uniform throughout Heterogenous Mixture - A mixture with uneven distribution of different substances, solids, liquids, gases. Elements - A molecule composed of one kind of atom; cannot be broken into simpler units by chemical reactions. Compunds - A pure substance that contains two or more different elements in a fix porportion

Of the following only,_________ is an extensive property. -Temperature -Boiling point -Freezing point -Density -Volume correct answer: Volume In the following list, only __________ is not an example of a chemical reaction. -the production of hydrogen gas from water -chopping a log into sawdust -the tarnishing of a copper penny -burning a plastic water bottle -charging a cellular phone correct answer: chopping a log into sawdust In which of the following numbers ar...

Create a line graph, a bar graph & circle graph. Tell when it is best to use each one. - correct answer ... Line- changes over time - correct answer Bar- Comparing Quantities - correct answer Circle- Parts of a whole (%) - correct answer Identify the axis that the independent & dependent variab...

us knowledge. To be termed scientific, a method of inquiry is commonly based on empirical or measurable evidence subject to specific principles of reasoning Experiments - answera procedure carried out to refute or validate a hypothesis. They help students understand the cause- and - effect relationship by demonstrating what outcomes occur when a particular factor is manipulated independent variable - answerelement manipulated in the experiment dependent variable - answerwhat the scientist...

Chem 161 Lecture 2 Answers 2023 UPDATE RATED A+ How can matter be classified? Matter: Purity: 1. Pure Substances A. Elements B. Compounds 2. Mixtures A. Homogenous Solutions B. Heterogenous Solutions What are the differences between compounds and mixtures? Compounds: 1) Definite Composition (with exact chemical formula) 2) Have different properties than the elements making up the compound (H20 is liquid compared to H2 and O as gases) 3) Can be separated into its elements only by chemic...

chemical property correct answer: the way substances may change/react to become another substance physical property correct answer: can be observed without any change to identification and/or composition matter correct answer: anything that has mass and occupies space reactivity, stability, flammability, toxicity, fermentation correct answer: examples of chemical properties malleability, ductility, conductivity, viscosity, boiling/melting point correct answer: examples of physic...