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Chapters 1-2
Stg Questions
Question | Answer |
---|---|
The primary motivation behind Chemistry is to:a. develop new productsb. make moneyc. understand an environmental problemd. gain knowledge | d. gain knowledge |
Applied Chemistry or chemical technology is designed to:a.solve a particular problemb. develop new productsc. gain knowledged. learn for the sake of learning | a. solve a problem |
chemistry is:a. a biological scienceb. a physical sciencec. concerned mostly with living thingsd. the study of electricity | b. physical science |
briefly define the five branches of chemistry | organic-study of carbon substancesinorganic-study of non carbon substamcesphysical- study of the behavior of chemical energy and matteranalytical- composition of substancesbiochemistry- study ofliving organisms |
Physical or chemical change:a ice meltingb paper burningc milk souringd gas under pressuree liquid evaporatingf food digestingg leaves changing color | a.physicalb.chemicalc. physicald. physicale. chemicalf physicalg physical |
mass and matter | mass the amount of matter an object containsmatter any thing that has mass and takes up space |
element and compound | element building block compound combination of two or more elements |
pure substance | matter that has uniform and definite composition |
physical and chemical property | physical can be observed or measured without changing the substance compositionchemical substance undergos a chemical reaction and to form a new substance |
homo and heter mixtures | homo can only see one hetero can see both or all |
extensive | depends on the amoutn of matter that is present volume mass energy |
intensive | does not depend on the amoutn of matter that is present melting point boiling point density |