大学化学智慧树知到答案章节测试2023年山东师范大学.docxVIP

大学化学智慧树知到答案章节测试2023年山东师范大学.docx

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实用文档 第一章测试 Mixtures and pure substances can be separated by physical.( ) A:对 B:错 答案:A Celsius is the unit of the temperature.( ) A:对 B:错 答案:A Systematic errors caused by limitations in an experimenter’s skill or ability to read a scientific instrument. ( ) A:对 B:错 答案:B In physical change, some of the physical properties of the sample may change, and its composition changed.( ) A:错 B:对 答案:B There is a temperature at which °C and °F have the same value.( ) A:对 B:错 答案:A 第二章测试 Cathode rays are deflected (偏转) in an electric field( ) A:对 B:错 答案:A STP usually refers to the temperature of 0℃ and the pressure of 101.325 kPa( ) A:错 B:对 答案:B Alkali metals are all first period elements( ) A:对 B:错 答案:B There are as many electrons outside the nucleus as there are units of positive charge on the nucleus. The atom as a whole is electrically neutral( ) A:对 B:错 答案:A X-rays are harmless to the human body( ) A:对 B:错 答案:B 第三章测试 The oxidation state of the underlined element KO2 is -1/2.( ) A:对 B:错 答案:A The mass percent O in the mineral malachite, Cu2(OH)2CO3 (Cu=64) is 33.04%.( ) A:错 B:对 答案:B The empirical formula of Pentane is CH.( ) A:对 B:错 答案:A C6H10O2 has the same empirical formula as aspidinol, C12H16O4 , a drug used to kill parasitic worms.( ) A:对 B:错 答案:A CH3CH(CH2CH3)CH2OH and CH3CH2CH2CH2CH2OH are isomers.( ) A:错 B:对 答案:B 第四章测试 Dry ice is pure.( ) A:错 B:对 答案:B 0873 has four significant numbers. ( ) A:错 B:对 答案:A 876 has four significant numbers.( ) A:错 B:对 答案:B Ferric oxide is FeO.( ) A:对 B:错 答案:B Mercury is a metallic element.( ) A:对 B:错 答案:A 第五章测试 Acetic acid cannot disassociates completely.( ) A:错 B:对 答案:B The reducing agent gains electrons in the reaction. ( ) A:对 B:错 答案:B The oxidizing agent causes another substance to be reduced.( ) A:错 B:对 答案:A Sulfuric acid cannot disassociates completely.( ) A:错 B:对 答案:A 1M HCl is more acidic than 0.1M H2SO4.( ) A:错 B:对 答案:A 第六章测试 Gases have much lower densities than liquids and solids.( ) A:对 B:错 答案:A There is a certain amount of gas i

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