줌달의 일반화학 해답 솔루션
줌달의 일반화학 해답 솔루션
줌달의 일반화학 해답
줌달의 일반화학 해답
1047810_ans_A41-A71.qxd
9/8/08
4:21 PM
Page A41
Answers to Selected Exercises
The answers listed here are from the Complete Solutions Guide, in which rounding is carried out at each intermediate step in a calculation in order to show the correct number of signicant gures for that step. Therefore, an answer given here may differ in the last digit from the result obtained by carrying extra digits throughout the entire calculation and rounding at the end (the procedure you should follow).
Chapter 1
19. A law summarizes what happens, e.g., law of conservation of mass in a chemical reaction or the ideal gas law, PV nRT. A theory (model) is an attempt to explain why something happens. Dalton’s atomic theory explains why mass is conserved in a chemical reaction. The kinetic molecular theory explains why pressure and volume are inversely related at constant temperature and moles of gas. 21. The fundamental steps are (1) making observations; (2) formulating hypotheses; (3) performing experiments to test the hypotheses. The key to the scientic method is performing experiments to test hypotheses. If after the test of time, the hypotheses seem to account satisfactorily for some aspect of natural behavior, then the set of tested hypotheses turns into a theory (model). However, scientists continue to perform experiments to rene or replace existing theories. 23. A qualitative observation expresses what makes something what it is; it does not involve a number; e.g., the air we breathe is a mixture of gases, ice is less dense than water, rotten milk stinks. The SI units are mass in grams, length in meters, and volume in the derived units of m3. The assumed uncertainty in a number is 1 in the last signicant gure of the number. The precision of an instrument is related to the number of signicant gures associated with an experimental reading on that instrument. Different instruments for measuring mass, length, or volume have varying degrees of precision. Some instruments only give a few signicant gures for a measurement while others will give more signicant gures. 25. Signicant gures are the digits we associate with a number. They contain all of the certain digits and the rst uncertain digit (the rst estimated digit). What follows is one thousand indicated to varying numbers of signicant gures: 1000 or 1 103 (1 S.F.); 1.0 103 (2 S.F.); 1.00 103 (3 S.F.); 1000. or 1.000 103 (4 S.F.). To perform the calculation, the addition/subtraction signicant rule is applied to 1.5 1.0. The result of this is the one signicant gure answer of 0.5. Next, the multiplication/division rule is applied to 0.5/0.50. A one signicant number divided by a two signicant number yields an answer with one signicant gure (answer 1). 27. The slope of the TF vs. TC plot is 1.8 ( 9/5) and the y-intercept is 32 F. The slope of TC vs. TK plot is 1 and the y-intercept is 273 C. 29. a. exact; b. inexact; c. exact; d. inexact 31. a. 3; b. 4; c. 4; d. 1; e. 7; f. 1; g. 3; h. 3 33. a. 3.42 1
자료출처 : http://www.ALLReport.co.kr/search/Detail.asp?pk=17041097&sid=knp868group1&key=
[문서정보]
문서분량 : 31 Page
파일종류 : PDF 파일
자료제목 : 줌달의 일반화학 해답
파일이름 : 줌달의 일반화학 해답(2).pdf
키워드 : 줌달,일반화학,해답,줌달의
자료No(pk) : 17041097
줌달의 일반화학 해답
줌달의 일반화학 해답
1047810_ans_A41-A71.qxd
9/8/08
4:21 PM
Page A41
Answers to Selected Exercises
The answers listed here are from the Complete Solutions Guide, in which rounding is carried out at each intermediate step in a calculation in order to show the correct number of signicant gures for that step. Therefore, an answer given here may differ in the last digit from the result obtained by carrying extra digits throughout the entire calculation and rounding at the end (the procedure you should follow).
Chapter 1
19. A law summarizes what happens, e.g., law of conservation of mass in a chemical reaction or the ideal gas law, PV nRT. A theory (model) is an attempt to explain why something happens. Dalton’s atomic theory explains why mass is conserved in a chemical reaction. The kinetic molecular theory explains why pressure and volume are inversely related at constant temperature and moles of gas. 21. The fundamental steps are (1) making observations; (2) formulating hypotheses; (3) performing experiments to test the hypotheses. The key to the scientic method is performing experiments to test hypotheses. If after the test of time, the hypotheses seem to account satisfactorily for some aspect of natural behavior, then the set of tested hypotheses turns into a theory (model). However, scientists continue to perform experiments to rene or replace existing theories. 23. A qualitative observation expresses what makes something what it is; it does not involve a number; e.g., the air we breathe is a mixture of gases, ice is less dense than water, rotten milk stinks. The SI units are mass in grams, length in meters, and volume in the derived units of m3. The assumed uncertainty in a number is 1 in the last signicant gure of the number. The precision of an instrument is related to the number of signicant gures associated with an experimental reading on that instrument. Different instruments for measuring mass, length, or volume have varying degrees of precision. Some instruments only give a few signicant gures for a measurement while others will give more signicant gures. 25. Signicant gures are the digits we associate with a number. They contain all of the certain digits and the rst uncertain digit (the rst estimated digit). What follows is one thousand indicated to varying numbers of signicant gures: 1000 or 1 103 (1 S.F.); 1.0 103 (2 S.F.); 1.00 103 (3 S.F.); 1000. or 1.000 103 (4 S.F.). To perform the calculation, the addition/subtraction signicant rule is applied to 1.5 1.0. The result of this is the one signicant gure answer of 0.5. Next, the multiplication/division rule is applied to 0.5/0.50. A one signicant number divided by a two signicant number yields an answer with one signicant gure (answer 1). 27. The slope of the TF vs. TC plot is 1.8 ( 9/5) and the y-intercept is 32 F. The slope of TC vs. TK plot is 1 and the y-intercept is 273 C. 29. a. exact; b. inexact; c. exact; d. inexact 31. a. 3; b. 4; c. 4; d. 1; e. 7; f. 1; g. 3; h. 3 33. a. 3.42 1
자료출처 : http://www.ALLReport.co.kr/search/Detail.asp?pk=17041097&sid=knp868group1&key=
[문서정보]
문서분량 : 31 Page
파일종류 : PDF 파일
자료제목 : 줌달의 일반화학 해답
파일이름 : 줌달의 일반화학 해답(2).pdf
키워드 : 줌달,일반화학,해답,줌달의
자료No(pk) : 17041097
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