SCIN131-Introduction to Chemistry-APUS-Final Review Assignment

Part 1 of 8 - 6.0/ 6.0 Points Question 1 of 23 2.0/ 2.0 Points Which form of electromagnetic radiation has the highest frequency?  A.Infrared Radiation  B.Radio Waves  C.X-rays  D.Microwaves  E.Gamma Rays Answer Key: E Question 2 of 23 2.0/ 2.0 Points The distance between adjacent wave crests is called  A.nu.  B.frequency.  C.wavelength.  D.trough.  E.none of the above Answer Key: C Question 3 of 23 2.0/ 2.0 Points Which of the following atoms is the largest?  A.Rb  B.Cs  C.Na  D.K  E.Li Answer Key: B

Part 2 of 8 - 6.0/ 6.0 Points Question 4 of 23 2.0/ 2.0 Points Which of the following compounds have resonance structures?  A.H2O  B.O3  C.NH3  D.CH4  E.None of the compounds have resonance structures. Answer Key: B Question 5 of 23 2.0/ 2.0 Points What is the molecular geometry of NH4+?  A.tetrahedral  B.linear  C.trigonal pyramidal  D.bent  E.not enough information Answer Key: A Question 6 of 23 2.0/ 2.0 Points What is the molecular geometry if you have a double bond, a single bond and 1 lone pair around the central atom?  A.trigonal pyramidal  B.linear  C.tetrahedral  D.bent  E.not enough information Answer Key: D

Part 3 of 8 - 6.0/ 6.0 Points Question 7 of 23 2.0/ 2.0 Points What is the equivalent pressure of 1520 torr in units of atm?  A.2.00  B.1520  C.380.  D.203,000  E.none of the above Answer Key: A Question 8 of 23 2.0/ 2.0 Points What is the final volume of a balloon that was initially 500.0 mL at 25°C and was then heated to 50°C?  A.542 mL  B.193 mL  C.461 mL  D.1.00 L  E.none of the above Answer Key: A Question 9 of 23 2.0/ 2.0 Points The vapor pressure of water at 20.0°C is 17.5 mm Hg. If the pressure of a gas collected over water was measured to be 453.0 mm Hg. What is the pressure of the pure gas?  A.0.573 atm  B.0.619 atm  C.0.0230 atm  D.0.596 atm  E.none of the above Answer Key: A

Part 4 of 8 - 6.0/ 6.0 Points Question 10 of 23 2.0/ 2.0 Points Silicon is which type of solid?  A.nonbonding atomic solid  B.metallic atomic solid  C.ionic solid  D.covalent atomic solid  E.molecular solid Answer Key: D Question 11 of 23 2.0/ 2.0 Points A situation where two opposite processes are occurring at equal rates, and no net change is taking place, is called:  A.evaporation.  B.vaporization.  C.dynamic equilibrium.  D.condensation.  E.none of the above Answer Key: C Question 12 of 23 2.0/ 2.0 Points The opposite process of freezing is:  A.boiling.  B.evaporation.  C.condensation.  D.sublimation.  E.none of the above Answer Key: E

Part 5 of 8 - 6.0/ 6.0 Points Question 13 of 23 2.0/ 2.0 Points The solubility of solids in water:  A.decreases with increasing temperature.  B.is independent of the temperature.  C.increases with increasing temperature.  D.Solids are not soluble in water.  E.none of the above Answer Key: C Question 14 of 23 2.0/ 2.0 Points If you add 4.00 mL of pure water to 6.00 mL of 0.750 M NaCl solution, what is the concentration of sodium chloride in the diluted solution?  A.0.250 M  B.0.450 M  C.1.13 M  D.0.500 M  E.none of the above Answer Key: B Question 15 of 23 2.0/ 2.0 Points If the solubility of sodium chloride is 36 grams per 100 grams of water, which of the following solutions would be considered unsaturated?  A.3.25 moles of NaCL dissolved in 500 ml of water  B.5.8 moles of NaCl dissolved in 1 L of water  C.1.85 moles of NaCl dissolved in 300 ml of water  D.none of the above Answer Key: B

Part 6 of 8 - 6.0/ 6.0 Points Question 16 of 23 2.0/ 2.0 Points In the following reaction: HCO3- (aq) + H2O (aq) → H2CO3 (aq) + OH- (aq)  A.H2O is an acid and H2CO3 is its conjugate base.  B.HCO3- is an acid and OH- is its conjugate base.  C.H2O is an acid and HCO3- is its conjugate base.  D.H2O is an acid and OH- is its conjugate base.  E.HCO3- is an acid and H2CO3 is its conjugate base. Answer Key: D Question 17 of 23 2.0/ 2.0 Points Which of the following is NOT a property of acids?  A.Acids have a slippery feel.  B.Acids have a sour taste.  C.Acids dissolve many metals.  D.Acids turn litmus paper red.  E.All of the above are properties of acids. Answer Key: A Question 18 of 23 2.0/ 2.0 Points What is the [H⁺] in a solution that has a pH of 3.35?  A.4.5 × 10-5 M  B.2.2 × 103 M  C.1 × 103.35 M  D.3.35 × 10-14 M  E.none of the above Answer Key: A

Part 7 of 8 - 6.0/ 6.0 Points Question 19 of 23 2.0/ 2.0 Points Based on the molecular formulas shown below, which compound shown below would NOT be classified as a noncyclical alkane?  A.C3H8  B.C4H10  C.C12H24  D.C5H12  E.C9H20 Answer Key: C Question 20 of 23 2.0/ 2.0 Points Which type of hydrocarbon is classified as being saturated?  A.alkynes  B.alkenes  C.alkanes  D.all of these  E.none of the above Answer Key: C Question 21 of 23 2.0/ 2.0 Points What will be the major product(s) when C2H4 undergoes an addition reaction with Cl2?  A.C2H3Cl2  B.C2H4Cl2  C.C2H3Cl  D.all of the above  E.none of the above Answer Key: B

Part 8 of 8 - 4.0/ 4.0 Points Question 22 of 23 2.0/ 2.0 Points All of the carbohydrates below are hexoses EXCEPT:  A.fructose.  B.galactose.  C.glucose.  D.both A and B  E.Glucose, fructose and galactose are all hexoses. Answer Key: E Question 23 of 23 2.0/ 2.0 Points The human genome project showed that humans have approximately ________ genes.  A.46  B.3 Million  C.36,000  D.20,000  E.none of the above Answer Key: D

Part 1 of 8 - 6.0/ 6.0 Points Question 1 of 23 2.0/ 2.0 Points Which color of the visible spectrum has the shortest wavelength (400 nm)?  A.orange  B.red  C.green  D.violet  E.yellow Answer Key: D Question 2 of 23 2.0/ 2.0 Points The element with a completely filled p-subshell is  A.Na.  B.P.  C.Ar.  D.Al.  E.none of the above Answer Key: C Question 3 of 23 2.0/ 2.0 Points Which form of electromagnetic radiation has the longest wavelength?  A.Infrared Radiation  B.Radio Waves  C.Gamma Rays  D.Microwaves  E.X-rays Answer Key: B

Part 2 of 8 - 6.0/ 6.0 Points Question 4 of 23 2.0/ 2.0 Points Which symbol should be used between two structures that represent resonance structures?  A.↔  B.←  C.→  D.≡  E.none of the above Answer Key: A Question 5 of 23 2.0/ 2.0 Points When a nonmetal bonds with a nonmetal  A.electrons are shared.  B.a molecular compound forms.  C.a covalent bond is involved.  D.all of the above are true  E.none of the above Answer Key: D Question 6 of 23 2.0/ 2.0 Points Which term matches the definition: A separation of charge within a bond.  A.coulombic attraction  B.electronegativity  C.polar covalent  D.nonpolar covalent  E.dipole moment Answer Key: E

Part 3 of 8 - 6.0/ 6.0 Points Question 7 of 23 2.0/ 2.0 Points If the initial pressure of a system was 1.00 atm and the volume was halved and the temperature was tripled, what is the final pressure?  A.2.00 atm  B.1.50 atm  C.0.667 atm  D.6.00 atm  E.not enough information Answer Key: D Question 8 of 23 2.0/ 2.0 Points What is the temperature (°C) of 2.48 moles of gas stored in a 30.0 L container at 1559 mm Hg? (R= 0.0821 L atm/ mol K)  A.302  B.-84  C.189  D.29  E.none of the above Answer Key: D Question 9 of 23 2.0/ 2.0 Points At STP, 12.69 g of a noble gas occupies 14.09 L. What is the identity of the noble gas? (R= 0.0821 L atm/ mol K)  A.Ar  B.Ne  C.Kr  D.He  E.not enough information Answer Key: B

Part 4 of 8 - 6.0/ 6.0 Points Question 10 of 23 2.0/ 2.0 Points What types of forces exist between I2 molecules?  A.dispersion forces  B.hydrogen bonding  C.ion-dipole forces  D.dipole-dipole forces  E.none of the above Answer Key: A Question 11 of 23 2.0/ 2.0 Points The opposite process of freezing is:  A.boiling.  B.evaporation.  C.condensation.  D.sublimation.  E.none of the above Answer Key: E Question 12 of 23 2.0/ 2.0 Points What happens as you start to add heat to a solid substance?  A.Heating of the now formed liquid results in increasing the liquid temperature.  B.Increasing the rate of heating of a substance at its melting point only causes more rapid melting.  C.When the melting point is reached, the thermal energy is sufficient to overcome intermolecular forces holding the components at their stationary points.  D.Thermal energy causes the components of the solid to vibrate faster.  E.all of the above Answer Key: E

Part 5 of 8 - 6.0/ 6.0 Points Question 13 of 23 2.0/ 2.0 Points If the solubility of sodium chloride is 36 grams per 100 grams of water, which of the following solutions would be considered unsaturated?  A.3.25 moles of NaCL dissolved in 500 ml of water  B.5.8 moles of NaCl dissolved in 1 L of water  C.1.85 moles of NaCl dissolved in 300 ml of water  D.none of the above Answer Key: B Question 14 of 23 2.0/ 2.0 Points Which of the following compounds is a strong electrolyte?  A.C4H8O2  B.C6H12O6  C.C7H14O5  D.Na C2H3O2  E.all of the above Answer Key: D Question 15 of 23 2.0/ 2.0 Points After you have completed the task of diluting a solution, which statement below must be TRUE?  A.The new solution has more volume but has a lower concentration than before.  B.The new solution has less volume but has a higher concentration than before.  C.The new solution has less volume but has a lower concentration than before.  D.The new solution has more volume but has a higher concentration than before.  E.none of the above Answer Key: A

Part 6 of 8 - 6.0/ 6.0 Points Question 16 of 23 2.0/ 2.0 Points Which of the following common bases is commonly used for manufacturing fertilizer?  A.NaHCO3  B.NH3  C.KOH  D.NaOH  E.all of the above Answer Key: B Question 17 of 23 2.0/ 2.0 Points What is the concentration of the hydronium ions in an acidic solution?  A.0.0 M  B.< 1.0 x 10-7 M  C.1.0 x 10-14 M  D.> 1.0 x 10-7 M  E.1.0 x 10-7 M Answer Key: D Question 18 of 23 2.0/ 2.0 Points Which of the following is NOT an acid-base conjugate pair?  A.H2CO3 and HCO3-  B.NH4+ and NH3  C.H2S and OH-  D.H2O and OH-  E.none of the above Answer Key: C

Part 7 of 8 - 6.0/ 6.0 Points Question 19 of 23 2.0/ 2.0 Points What is the molecular geometry of the red carbon atom in the following compound,  A.bent  B.linear  C.trigonal planar  D.tetrahedral  E.none of the above Answer Key: B Question 20 of 23 2.0/ 2.0 Points A straight chain saturated hydrocarbon has eight carbon atoms. Its molecular formula is  A.C8H18  B.C8H16  C.C8H14.  D.C8H24.  E.none of the above Answer Key: A Question 21 of 23 2.0/ 2.0 Points The compound named 2,3-dimethylpentane would have how many total number of carbons?  A.5  B.3  C.7  D.8  E.none of the above Answer Key: C

Part 8 of 8 - 4.0/ 4.0 Points Question 22 of 23 2.0/ 2.0 Points A seven-carbon sugar is known as  A.sevose.  B.hexose.  C.tetrose.  D.heptose.  E.none of the above Answer Key: D Question 23 of 23 2.0/ 2.0 Points Which type of structure is maintained by interaction between R-groups on amino acids that are separated by long distances on the same chain?  A.Primary Structure  B.Secondary Structure  C.Tertiary Structure  D.Quaternary Structure  E.Pental Structure Answer Key: C

Question 1 of 23 2.0/ 2.0 Points Which orbital is represented as a sphere?  A.s  B.p  C.d  D.f  E.not enough information Answer Key: A Feedback: Good. See section 9.5 Question 2 of 23 2.0/ 2.0 Points Which of the following is TRUE regarding atomic size?  A.increases down a group and from left to right across a period.  B.increases up a group and diagonally across the Periodic Table.  C.increases down a group and from right to left across a period.  D.increases up a group and from left to right across a period.  E.increases up a group and from right to left across a period. Answer Key: C Question 3 of 23 2.0/ 2.0 Points In the fifth principal shell, you would expect to find how many how many subshells?  A.3  B.2  C.1  D.4  E.5 Answer Key: E Feedback: Good. See section 9.6

Part 2 of 8 - 6.0/ 6.0 Points Question 4 of 23 2.0/ 2.0 Points Which of the following elements can NEVER have a double bond?  A.chlorine  B.sulfur  C.oxygen  D.nitrogen  E.carbon Answer Key: A Feedback: good. see 10.5 Question 5 of 23 2.0/ 2.0 Points How many total electrons would be used to draw the lewis structure of the nitrate ion?  A.24 electrons  B.23 electrons  C.22 electrons  D.31 electrons Answer Key: A Feedback: see 10.5 Question 6 of 23 2.0/ 2.0 Points The lewis structure of an atom of phosphorous has how many unpaired electrons (dots)?  A.7  B.2  C.5  D.3 Answer Key: D

Part 3 of 8 - 6.0/ 6.0 Points Question 7 of 23 2.0/ 2.0 Points You have a container that is holding 5.75 L of nitrogen gas at a pressure of 5 atm. If the volume increases to 10.0 L, what is the new pressure?  A.2.88 atm  B.8.70 atm  C.0.348 atm  D.28.8 atm Answer Key: A Question 8 of 23 2.0/ 2.0 Points My barometer is reading 1253 torr. What is the pressure in mmHg?  A.1.253  B.1253  C.1.649  D.1649 Answer Key: B Question 9 of 23 2.0/ 2.0 Points I have a hot air balloon that has 18.0 g Helium gas inside of it. If the pressure is 2.00 atm and the temperature is 297K, what is the volume of my balloon?  A.109.6 L  B.110 L  C.219 L  D.55 L  E.54.9 L Answer Key: E

Part 4 of 8 - 4.0/ 6.0 Points Question 10 of 23 0.0/ 2.0 Points What type(s) of matter has a high density and does NOT take the shape of its container?  A.gases  B.liquids  C.solids  D.both solids and liquids Answer Key: C Feedback: This is discussed in 12.2 Question 11 of 23 2.0/ 2.0 Points As a kid, I used to have sleepovers with one of my really good friends. Her dad would bring home dry ice and place it in a bowl in the center of the table. The solid dry ice changed into a gas and flowed over our pizza. What term describes this behavior?  A.deposition  B.melting  C.condensation  D.sublimation  E.evaporation Answer Key: D Question 12 of 23 2.0/ 2.0 Points What type(s) of matter can be described as having a low density and as being compressible?  A.gases  B.liquids  C.solids  D.both solids and liquids  E.both gases and liquids Answer Key: A Feedback: Good. This is discussed in 12.2

Part 5 of 8 - 6.0/ 6.0 Points Question 13 of 23 2.0/ 2.0 Points You are preparing solutions in the lab and need to make 250.0 mL of a 2.00 M HCl solution. All you have in stock is 6.00 M HCl. How many milliliters of the stock solution do you need?  A.0.048 mL  B.520.0 mL  C.750.0 mL  D.83.3 mL Answer Key: D Feedback: Good. Question 14 of 23 2.0/ 2.0 Points What mass of sucrose, C12H22O11 is present in 75.0 mL of a 2.50 M solution?  A.0.188 grams  B.64.2 grams  C.642 grams  D.188 grams Answer Key: B Question 15 of 23 2.0/ 2.0 Points Which of the following is true of dissolving gases in water?  A.Pressure above the solution has no influence on solubility.  B.As pressure above the solution increases, solubility decreases.  C.As pressure above the solution increases, solubility increases.  D.It doesn't matter because gases don't dissolve in water. Answer Key: C Feedback: Good. Solubility of gases is in 13.4

Part 6 of 8 - 6.0/ 6.0 Points Question 16 of 23 2.0/ 2.0 Points According to Bronsted-Lowry, an acid:  A.produces H⁺ in solution.  B.is a proton donor.  C.is a proton acceptor.  D.produces OH⁻ in solution. Answer Key: B Feedback: Good. Definitions discussed in 14.4 Question 17 of 23 2.0/ 2.0 Points Which of the following compounds is a base that is used to make fertilizer?  A.ammonia  B.sodium bicarbonate  C.sodium phosphate  D.sodium hydroxide  E.potassium hydroxide Answer Key: A Feedback: Good. Base properties and examples are discussed in 14.3 Question 18 of 23 2.0/ 2.0 Points How could you describe an acid based on Arrhenius's theory?  A.produces OH⁻ in solution.  B.produces H⁺ in solution.  C.a proton acceptor.  D.a proton donor.  E.none of the above Answer Key: B Feedback: Good. These definitions are covered in 14.4

Part 7 of 8 - 6.0/ 6.0 Points Question 19 of 23 2.0/ 2.0 Points Which of the following best describes the compound below? C5H10  A.alkane  B.alkene  C.alkyne  D.benzene Answer Key: B Feedback: Good. Alkanes are discussed in 18.5 Question 20 of 23 2.0/ 2.0 Points We use polymers every day and never really realize it. Polyethylene is used in many drink containers and PVC pipe is a polymer as well. Which of the following is NOT true regarding polymers?  A.Monomer units link together and do not eliminate any atoms or groups when forming a polymer.  B.During condensation polymerization an atom or group is eliminated.  C.Copolymers contain more than one kind of polymer.  D.Nylon 6,6 and polyurethane are examples of copolymers. Answer Key: D Feedback: Good. Polymers are discussed in 18.17 Question 21 of 23 2.0/ 2.0 Points Suffixes are commonly used in organic chemistry and can tell us a lot about the compound. What can we infer from the name "pentanal?"  A.aldehyde  B.ether.  C.ketone.  D.ester. Answer Key: A Feedback: Good. This type of chemicals is discussedin 18.15

Part 8 of 8 - 4.0/ 4.0 Points Question 22 of 23 2.0/ 2.0 Points DNA has a double helix structure. This structure is held together with what?  A.disulfide bonds.  B.peptide bonds.  C.hydrogen bonds.  D.covalent bonds.  E.ester linkages. Answer Key: C Feedback: Good. DNA structure is discussed in 19.8 Question 23 of 23 2.0/ 2.0 Points Which of the following would not fall under the classification of lipids?Which of the following would not fall under the classification of lipids?  A.fats.  B.fatty acids.  C.oils.  D.amino acids.  E.All of the above are lipids. Answer Key: D, D Feedback: Good. Lipids are discussed in 19.4