Question: Peptide bonds link the amino acids together to make a primary polypeptide sequence. The bonds are
Question: If a balloon is filled with helium were heated with a blow dryer , the balloon would
Question: You are setting up an experiment to test a pair of experimental headache medications, X & Y . As part of the experiment setup, you take individuals suffering from headaches and divide them into 4 groups and provide each with a different pill. Which of the 4 groups below would you classify as the positive control?
Question: Which of the following is not normally part of the scientific inquiry?
Question: An isotope has a total of 46 neutrons and 22 protons. What would be the atomic symbol of this isotope? Ti (Titanium)
Question: Which of the following is the correct formula for nitride ion?
Question: Select all that would be classified as cations
Question: An isotope of gallium (atomic number 31) has a mass number of 67 . How many neutrons will this isotope have?
Question: Select all of the following that would be classified aspolar covalent compounds:
Question: Select all of the following compounds that would be classified as ionic:
Question: Which of the following would you expect to form when a nickel(I) ion combines with nitrate?
Question: Calcium Phosphate, Ca3(PO4)2 is used to treat calcium deficiency . What is the molar mass of this compound?
Question: Determine the number of oxygen atoms in magnesium hydroxide:
Question: Xenon gas reacts with fluorine gas to form xenon tetrafluoride. Identify which image in the figure represents the reactants and which image represents the products in the correct ratio so that mass is conserved.
Question: Balance the following skeletal equation: Li(s) + H20(l) àLiOH(aq)+H2(g)
Question: Which of the following units can be used to represent the concentration of a solution prepared by dissolving salt in water. Select all that apply :
Question: A solution of ethanol ,C2H5OH is prepared by dissolving 25.0 ml ofethanolinenoughwatertogiveatotalvolumeof250.0ml .What is the percent by volume concentration of ethanol ?
Question: How many liters of 8 M NaCl solution would you need to add to a reaction that requires 2 moles of NaCl ?
Question: Which of the following correctly identifies the peptide bond as indicated by the circled bond ?
Question: Which type of protein structure results from the arrangement of amino acids in space in a local region in the protein chain, often in the form of a pleated sheet or helix?
Question: Identify the two classes of nucleic acids:
Question: A portion of one strand in a DNA molecule has the following sequence of bases :AATAGCAGGCTTA. Identify the sequence of bases in the other strand of the DNA molecule that would hydrogen bond to these bases :
Question: Which of the following is present in DNA but not found inRNA?
Question: Select all carbohydrates designated aspolysaccharides?
Question: Which of the following is electron configuration dot structure for sulfur monoxide ?
Question: Which of the following best describes this molecule CH3CH2CH2CHCHCH2CH2COOH –
Question: You have a triglyceride containing no carbon to carbon double bonds. Determine the type of biomolecule and physical state :
Question: What happens when you heat a sealed metal canister of gas(assumeidealgasproperties)?
Question: When two atoms of the nitrogen combine with eachother, the bond that form is :
Question: What is the name of the following compound,N2F4.Calculate the molar mass ( SHOW WORK)
Question: You have a sample of gas and want to determine the volume, in liters that your 3.5 mol H2S(g) sample will occupy at 70 C and 1.75 atm?
Question: An isotope of an iodine(I) with a mass number of 117 and an atomic number of 53 decays by positron emission. Give the resulting chemical symbol, atomic number, mass number for the resulting atom
Question: At a fixed temperature, a sample of gas is moved entirely from a smaller container to a larger container. You would expect:
Question: You would like to prepare an 8L of a 0.25 M HCl solution. How many liters of a 4.5 M HCl solution would you require? SHOW ALL WORK
Question: Math the condensed structure of the chemical compound to the correct functional group CH3CH2CH2CHCH2-
Question: Match the organic compound to the corresponding use or application
Question: Given the formula of the compound CH3CH2CH2OH, determine the name of the functional group, give the correct carbon chain prefix , and give the name of the organic compound
Question: An isotope of a potassium with an atomic number of 19 and a mass of the number 40 undergoes beta decay. Give the resulting chemical symbol , and mass number of the resulting atom(decay product)
Question: You will be working with a radioactive isotope as part of your job duties. Which of the following radioactive processes would require the greatest amount of shielding to protect you from radiation exposure?
Question: Provide 2 applications or uses of radioactiveisotopes:
Question: Balance the chemical equation C5H12+O2àCO2+H20
Question: You preform the reaction below and obtain 6.00 grams of H20. How many grams of NH3 did you react to form this product? 2NH3(g)+3CuO(s) à3Cu(s)+N2(g)+3H20(l) SHOW ALL WORK
Question: Balance this reaction, then determine the element that is being oxidized ; Al +H2S àAl2S3 + H2
Question: Determine which specie is acting as an acid in the forward direction; CH3COOH+H20 ß> CH3COO- + H30+
Question: Select all solutions that would be considered acidic. Solution with a proton concentration of
Question: Match the expected shape to the compound CO2
Question: A partial sequence of Mrna reads as5-AAA-GAU-UCA-CUA-AGC-3. What would be the polypeptide sequence that would result from translation of this mRNA sequence?
Question: A portion of one strand in a DNA molecule has the following sequence of bases: AAT-AGC-AGG-CTT-TCG . Identify the sequence of bases in the other strand of DNA molecule that would hydrogen bond to these bases
Question: What would be the molarity of a solution obtained by dissolving 67.00 g of NH4OH to a total volume of 970 ml. Show all work .
Question: If you were to prepare a solution by diluting 0.5 liters of a 4.0 M H2S04 solution to a volume of 2.5 liters, what would be the concentrationinmolarityofyourH2S04solution?SHOWALLWORK
Question: How many moles of gas are contained in a canister of gas that has a pressure of 7.0 ATM, temp of 22C, and internal volumeof5.1 liters. Show all your work and determine the amount of moles of has in this can ister
Question: Which of the following processes results in the conversion of a proton to a neutron within a nucleus?
Question: Predict the products of this neutralization reaction LiOH+HClà
Question: A scientist is testing a series of antrepellants,A,B,C D,andE.She preforms an experiment taking five small equal sized sugar cubes andcoatingeachinadifferentantrepellent.Shethenplaceseachof these cubes in a separate tank of ants. She also places identical sugar cubes that she has not coated in a repellent in a separate tank of ants. After 2 hours, she measures how much of each sugar cube remains in this scientist experiment. What was the purpose of the uncoated sugarcubes?
Instituition / Term
Term
Spring 2021
Institution
CHEM 120 Introduction to General, Organic, and Biological Chemistry with Lab
-80x80.JPG "CHEM 120 Week 2 Discussion; Atomic Structure")
-80x80.JPG "CHEM 120 Week 6 Discussion: Radiation - Radioisotope Tc-99m")
