2023 COMPLETE WITH SOLUTIONS A

CHEM 120 Introduction To General, Organic, And Biological Chemistry With Lab

CHEM 120 Week 8 latest Final Exam Jan

2023 COMPLETE WITH SOLUTIONS A+

CHEM120 FINAL

• The name of the compound FES04 is iron sulfate

• Peptide bonds link the amino acids together to make a primary polypeptide

sequence. The bonds are AMIDE

• If a balloon is filled with helium were heated with a blow dryer , the balloon would

increase in volume

• 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? A group given the placebo pill

• Which of the following is not normally part of the scientific inquiry? Philosophizing

• An isotope has a total of 46 neutrons and 22 protons. What would be the atomic

symbol of this isotope? Ti (Titanium)

• Which of the following is the correct formula for nitride ion? N3-

• Select all that would be classified as cations. Magnesium, Li+

• An isotope of gallium (atomic number 31) has a mass number of 67 . How many

neutrons will this isotope have? 36

CHEM 120 Introduction To General, Organic, And Biological Chemistry With Lab

• Select all of the following that would be classified as polar covalent compounds:

PCl3,H20

• Select all of the following compounds that would be classified as ionic : Sodium

Chloride, Ca3N2,CaF2

• Which of the following would you expect to form when a nickel(I) ion combines with

nitrate? NiNO3

CHEM 120 Introduction To General, Organic, And Biological Chemistry With Lab

• Calcium Phosphate, Ca3(PO4)2 is used to treat calcium deficiency . What is the

molar mass of this compound? 310.18g/mol

14. Determine the number of oxygen atoms in magnesium hydroxide: 2

• 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. Option that states Image A shows reactants and image C shows products

16 . Balance the following skeletal equation: Li(s) + H20(l) 

 LiOH(aq)+H2(g)

2Li(s)+2H20(l) 2LiOH(aq)+H2(g)

• 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 : M(mol/liter) , % mass by volume

• A solution of ethanol ,C2H5OH is prepared by dissolving 25.0 ml

of ethanol in enough water to give a total volume of 250.0 ml .What is the percent by volume concentration of ethanol ? 10%

• How many liters of 8 M NaCl solution would you need to add to

a reaction that requires 2 moles of NaCl ? 0.25 L

CHEM 120 Introduction To General, Organic, And Biological Chemistry With Lab

• Which of the following correctly identifies the peptide bond as

indicated by the circled bond ? C

• 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? Secondary

22. Identify the two classes of nucleic acids: Ribonucleic acid and

deoxyribonucleic acid

• 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 : TTATCGTCCGAAT

• Which of the following is present in DNA but not found in RNA?

Thymine

• Select all carbohydrates designated as polysaccharides?

Glucose, starch , cellulose

• Which of the following is the electron configuration dot

structure for sulfur monoxide ?

• Which of the following best describes this molecule

CH3CH2CH2CHCHCH2CH2COOH – monounsaturated fatty acid 28.You have a triglyceride containing no carbon to carbon double

bonds. Determine the type of biomolecule and physical state :

saturated fat , solid