Bioportal Ch. 2 Study Guide

1. Polar molecules A. flip bonds with an unequal distribution of electric charge. B. must reach ions in irrigate solution. C. receive bonds with an equal distribution of electric charge. D. have bonds with an boilers suit negative charge. E. have bonds with an overall positive charge. coiffe call in component 2. 2 How Do Atoms fastening to wee-wee Molecules? Points pull in1/1 do practiceA Your chemical substance reactionA 2. Hydro speed of lights are _______ and _______, whereas salts are _______ and _______. A. non frigid aquaphobic polar hydrophilic B. nonpolar hydrophilic polar aquaphobic C. polar hydrophilic nonpolar hydrophobicD. polar hydrophobic nonpolar hydrophilic E. no(prenominal) of the above crystallize reassure branch 2. 2 How Do Atoms Bond to Form Molecules? Points take in1/1 Correct helpA Your solutionA 3. The pH of coffee is close to 5 and that of pure pissing is 7. This means that A. coffee is more than basic than water. B. water is more sup ermanic than coffee. C. the H+ concentration of coffee is seven-fifths that of water. D. the H+ concentration of water is one-one hundredth that of coffee. E. the H+ concentration of water is one-hundred measure that of coffee. Correct See slit 2. 4 What Makes pissing So Important for smell?Points gain1/1 Correct reparteeD Your retortD 4. Which of the quest statements best describes the inequality betwixt an atom and a molecule? A. An element is sedate of atoms a molecule is non. B. An element is composed of simply one kind of atom molecules can be composed of more than one kind of atom. C. An element is unstable molecules are stable. D. Elements always have start atomic weights than molecules. E. Elements exist in nature lone(prenominal) as parts of molecules. Correct See portion 2. 1 How Does nuclear Structure Explain the Properties of reckon? Points Earned1/1 Correct attend toBYour answerB 5. Solid salt, NaCl, is neutral. When fade away in water, NaCl A. rema ins as NaCl (does not dissociate). B. dissociates to mixture Na and Cl+. C. dissociates to form Na+ and Cl ions that do not interact with water molecules. D. dissociates to form Na+ and Cl ions that interact with water molecules. E. does not dissociate, but interacts with water molecules. Correct See particle 2. 2 How Do Atoms Bond to Form Molecules? Points Earned1/1 Correct AnswerD Your reparteeD 6. Why is the pH of a 0. 1 M solution of acetic acid in water higher than that of a 0. 1 M solution of HCl in water?A. HCl is a weaker acid than acetic acid. B. The acetic acid does not fully ionize in water, but HCl does. C. HCl does not fully ionize in water, but acetic acid does. D. Acetic acid is a best buffer than HCl. E. Acetate (ionized acetic acid) is a buckram base. Correct See portion 2. 4 What Makes wet So Important for deportment? Points Earned1/1 Correct AnswerB Your retortB 7. The reactivity of an atom arises from the A. get-up-and-go difference in the midst of the s and p orbitals. B. potential ability of the outermost get. C. average distance of the outermost shell from the nucleus. D. um of the potential energies of all electron shells. E. existence of funny electrons in the outermost shell. Correct See Section 2. 2 How Do Atoms Bond to Form Molecules? Points Earned1/1 Correct AnswerE Your rejoinderE 8. Covalent bond make-up depends on the capability of atoms to A. share electrons with other atoms. B. donate electrons to other atoms. C. receive electrons from other atoms. D. Both a and b E. All of the above Correct See Section 2. 2 How Do Atoms Bond to Form Molecules? Points Earned1/1 Correct AnswerA Your solventA 9. Which of the following structures molecules is unseasonable?A. CH3NH3 B. CH2=CH2 C. CH3NH2 D. CH3NH3+ E. CH3CH3 Correct See Section 2. 3 How Do Atoms Change Partners in Chemical Reactions? Points Earned1/1 Correct AnswerA Your receptionA 10. What property of water contributes most to the ability of fish in lakes to sur vive very acold winters? A. water supply is cohesive. B. water supply has a high oestrus capacity. C. Frozen water is more dense than fluent water. D. Frozen water is less dense than limpid water. E. Water forms total heat bonds. Correct See Section 2. 4 What Makes Water So Important for Life? Points Earned1/1 Correct AnswerD Your ResponseD 1. Water is demand to life. Which of the following physical properties of water affect(s) life in some beneficial way? A. Cohesiveness B. spirited heat capacity C. High heat of vapor D. Ice is less dense than liquid water E. All of the above Correct See Section 2. 4 What Makes Water So Important for Life? Points Earned1/1 Correct AnswerE Your ResponseE 12. Which of the following interactions between atoms is the strongest? A. Hydrophobic B. Ionic C. Covalent D. van der Waals E. enthalpy bonds Correct See Section 2. 2 How Do Atoms Bond to Form Molecules? Points Earned1/1Correct AnswerC Your ResponseC 13. Given that Avagadros flake is 6. 02 ? 1023, how many molecules of KCl would there be in 1013 liter of a 1 M KCl solution? A. 6. 02 ? 1036 B. 6. 02 ? 1010 C. 6. 02 ? 1010 D. 6. 02 ? 103 E. 6. 02 ? 1013 Correct See Section 2. 4 What Makes Water So Important for Life? Points Earned1/1 Correct AnswerB Your ResponseB 14. For a covalent bond to be polar, the two atoms that form the bond must have A. differing atomic weights. B. differing numbers of neutrons. C. differing melting points. D. differing electronegativities. E. similar electronegativities.Correct See Section 2. 2 How Do Atoms Bond to Form Molecules? Points Earned1/1 Correct AnswerD Your ResponseD 15. Which of the following statements about chemical reactions is false? A. They occur when atoms approve or change their bonding partners. B. Energy may be created or destroyed in a chemical reaction. C. Reactions may go to completion. D. Changes in forms of energy may accompany chemical reactions. E. The products of a chemical reaction are formed from the reacta nts. Correct See Section 2. 3 How Do Atoms Change Partners in Chemical Reactions? Points Earned1/1 Correct AnswerBYour ResponseB 16. Propane (CH3CH2CH3), is considered a nonpolar molecule because A. it does not contain group O. B. carbon and hydrogen have similar electronegativities. C. it is a gas. D. it is flammable. E. it forms hydrogen bonds. Correct See Section 2. 2 How Do Atoms Bond to Form Molecules? Points Earned1/1 Correct AnswerB Your ResponseB 17. Isotopes of an element A. are always unstable and radioactive. B. have diametric numbers of protons. C. have the same atomic weight. D. have different numbers of neutrons. E. have different numbers of electrons. Correct See Section 2. How Does Atomic Structure Explain the Properties of Matter? Points Earned1/1 Correct AnswerD Your ResponseD 18. An element that contains ten protons and ten electrons is probable to A. form covalent bonds with another element. B. form bonce bonds with another element. C. be chemically inert (s table). D. be radioactive. E. be toxic. Correct See Section 2. 2 How Do Atoms Bond to Form Molecules? Points Earned1/1 Correct AnswerC Your ResponseC 19. Rank the elements carbon (C), hydrogen (H), oxygen (O), and phosphorus (P) in decreasing order of the number of covalent bonds they usually form.A. C P N O H B. P O C N H C. P C N O H D. P C O N H E. P C O H N Correct See Section 2. 2 How Do Atoms Bond to Form Molecules? Points Earned1/1 Correct AnswerC Your ResponseC 20. The molecular weight of acetic acid is 60. How many grams of acetic acid would be required to prepare 10 ml of a 0. 001 M (1. 0 mM) solution? A. 6. 0 B. 0. 6 C. 0. 0006 D. 0. 06 E. 0. 006 Correct See Section 2. 4 What Makes Water So Important for Life? Points Earned1/1 Correct AnswerC Your ResponseC