Introduction to Chemistry

Modern Organic Chemistry I

Lecture 5 Handout Key 1. Proteins have a characterisc peak in UV absorbance around 280 nm due to which amino acids? a. His b. Tyr c. Trp d. a & b e. b & c Trp (W) > Tyr (Y) > Phe (F) 2. The number of amino acid residues in a protein with molecular weight of 66,000 Da is about a. 450 Da b. 600 Da c. 750 Da d. 1000 Da e. none of the above 66,000 Da/ 110 Da = 600 Da 3. At pH=2 what charge

CHEM | 3361 | Modern Organic Chemistry I | study guides | Lecture 5 Handout Key 1. Prote

/Lecture 12 Handout Key 1. What three amino acids make up the catalyc triad of chymotrypsin? a. Ser, Lys, Ala b. Ser, His, Ala c. Ser, His, Asp d. Ser, His, Glu e. Ser, Arg, Asp 2. The bond formed between aspartate and hisdine, during catalysis chymotrypsin is known as a: a. Hydrogen bond b. Covalent bond c. Ionic bond d. Low barrier hydrogen bond 3. Asparc prot

CHEM | 3361 | Modern Organic Chemistry I | study guides | /Lecture 12 Handout Key 1. Wha

9/12/2020 Data Analysis and Graphing 1/5 Question 1 Correct 3.50 points out of 3.50 The metric system is based upon Select one: Multiples of 1 Common Core Standards European System of Measurement Multiples of 10 Question 2 Correct 3.50 points out of 3.50 The number 0.421 has how many signiﬁcant ﬁgures? Select one: 1 2 3 4 (877) 787-8375 HELP CENTER CHEM101L_ Started on Thursday, September 10, 2020, 10:31 AM State Finished Completed on Thursday, September 10, 2020, 10:37 AM Time taken 6 mins 14 secs Grade 31.50 out of 35.00 ( 90 %) The correct answer is: Multiples of 10 The correct answer is: 3 Question 3 Correct 3.50 points out of 3.50 Which of the following terms refers to how close an experimental result comes to the ‘correct’ value? Select one: Precision Accuracy Experimental Error Constant Question 4 Correct 3.50 points out of 3.50 Which option best describes the function of a line graph? Select one: To compare independent results. To display results in a continuous series. To summarize data in rows and columns. To plot data in a coordinate plane. Question 5 Correct 3.50 points out of 3.50 The number 4012 has how many signiﬁcant ﬁgures? Select one: 1 2 3 4 9/12/2020 Data Analysis and Graphing 1/5 The correct answer is: Accuracy The correct answer is: To display results in a continuous series. 9/12/2020 Data Analysis and Graphing 1/5 The correct answer is: 4 Question 6 Correct 3.50 points out of 3.50 The correct way to read the volume of a ﬂuid in a graduated cylinder is at the Select one: Meniscus Minces Mimesis Minuses Question 7 Correct 3.50 points out of 3.50 A physical property that depends on only the type of material and not on how much of that material that you Select one: Inheritable property Intensive property Extensive property Exhausted property Question 8 Incorrect 0.00 points out of 3.50 True or false: If you are changing a larger unit into a smaller unit, like cm into mm, the decimal is moved to Select one: True False 9/12/2020 Data Analysis and Graphing 1/5 The correct answer is: Meniscus The correct answer is: Intensive property 9/12/2020 Data Analysis and Graphing 1/5 The correct answer is: True 9/12/2020 Data Analysis and Graphing 5/5 Question 9 Correct 3.50 points out of 3.50 In the metric system what unit of measurement is used for volume? Select one: Inches Liter Pint Kilometers Question 10 Correct 3.50 points out of 3.50 Which of the following is an example of an intensive property? Select one: Mass Density Volume Length The correct answer is: Liter The correct answer is: Density

CHEM | 101 | Introduction to Chemistry | exam | 9/12/2020 Data Analysis and Gr

Lectures 1 and 2 Handout Key 1. What is the rao of the concentraon of a weak acid to its conjugate base when the pH of a soluon is one pH unit above the pKa of the weak acid? a. 1:2 b. 1:10 c. 10:1 d. 2:1 e. 1:1 pH = pKa + log[A - ]/[HA] 6 = 5 + log[A - ]/[HA] 1 = log[A - ]/[HA] 10 = [A - ]/[HA] 2. Normal blood pH is 7.4. What is its H + concentraon? a. 4.0 x 10 -8 M b. 4.0 x 10 -6 M c. 1.0 x

CHEM | 3361 | Modern Organic Chemistry I | study guides | Lectures 1 and 2 Handout Key 1

Queson 21 Correct 4.60 points out of 4.60 Which polymer is a copolymer of a ﬁve-carbon sugar, four diﬀerent bases (adenine, thymine, guanine, and cytosine), and phosphoric acid? Select one: ATP ADP Kevlar DNA RNA (877) 787-8375 HELP CENTER CHEM101_MH_V4 | Topic 11: Modern Materials Started on Saturday, September 5, 2020, 1:47 AM State Finished Completed on Saturday, September 5, 2020, 2:10 AM Time taken 22 mins 51 secs Grade 78.20 out of 115.00 ( 68 %) The correct answer is: DNA Queson 3 Incorrect 0.00 points out of 4.60 Polyacrylonitrile, characterized by the following repeang unit, is made from which of these monomers? Select one: CH 3 CH 2 CN HOCH 2 CH 2 CH 3 CH 3 CH=CHCN CH 2 =CHCN CH 2 =CNCH 3 The correct answer is: Liquid crystals The correct answer is: CH 2 =CHCN Queson 2 Incorrect 0.00 points out of 4.60 What is the name of the substances that exhibit properes of ﬂow, conform to the shape of the container, and have a regular arrangement of parcles in a lace? Select one: Lace polymers Polymerizaon fronts Biphase polymers Cophase polymers Liquid crystals Queson 5 Incorrect 0.00 points out of 4.60 Which of the following is a natural polymer? Select one: Rubber Polyester Silk Rubber & polyester Rubber & silk The correct answer is: Styrene-butadiene The correct answer is: Rubber & silk Queson 4 Correct 4.60 points out of 4.60 Which one of these materials is a copolymer ? Select one: Styrene-butadiene Polyvinyl chloride Polypropylene Poly- cis -isoprene Polyethylene

All courses in CHEM

Popular Documents