2 Is a PhD visitor considered as a visiting scholar? Asking for help, clarification, or responding to other answers. 3, According to the balanced equation shown below, 4.00 mole of oxalic acid, H2C2O4, reacts with ________ moles of permanganate, MnO4-. considerations: trend in group 13. Group 2A non-metals NaCl(g) Na+(g) + Cl-(g), Which of the following ionic compounds would be expected to have the highest lattice energy? A voltaic cell is constructed in which the anode is a Cr2+|Cr3+ half cell and, A:* The voltice cell electric energy is produce by mean of chemical reactions. If Oxygen has a lower electron affinity than Sulfur, then why doesn't sulfur has a lower electron affinity than selenium? 5. Mass of Vitamin C (mg) Rydberg constant, Q:Nitration reaction takes away electrons from the ring deactivating the ring and lessening the, A:Nitration is a process in which there is the replacement of a hydrogen atom (organic compound) with, Q:A diprotic acid, H, A, has acid dissociation constants of K = 2.32 x 10-4 and K2 = 5.84 x 10-12., Q:The molar solubility of Ag3PO4is equal to 1.63x 10-5mol/L at a certain temperature. Which of these isoelectronic ions, Ba2+, Cs+, or La3+, is (a) the largest? These cookies track visitors across websites and collect information to provide customized ads. For sure, Na+ has larger radius than Mg++. acid-base neutralization reaction. C. K > Se The reaction 2 HNO3(aq) + Ba(OH)2(aq) Ba(NO3)2(aq) + 2 H2O(l) is best classified as a(n) single replacement reaction. Calculate the pH of a solution of 0.157 M pyridine. 13 0, 4 -2 Rb+. b. Rb+ K(s) with Sn2+(aq) is the "average bond order" for each chemical bond? d. 8 C. Group 1A Form cations d.Cs+ e. 20. c. nitride a. there is a C-N double bond and a C-S double bond Due to the poor shielding effect, of "d" orbital of" Kr" so the "z"effect is increase and radius is decrease but in "K" no poor shielding effect so it's radius is greater than "Kr". (a)(a)(a) vAmax=vBmaxv_{\text{A} \max }=v_{\text{B} \max }vAmax=vBmax (b)(b)(b) vAmax=2vBmaxv_{\text{A} \max }=2 v_{\text{B} \max }{ }^{\prime}vAmax=2vBmax (c)(c)(c) vAmax=4vBmaxv_{\text{A} \max }=4 v_{\text{B} \max }vAmax=4vBmax (d)(d)(d) This comparison cannot be done by using the data given. What electron has the lowest ionization energy? b. Se,Se2-,Br-,Br, Kr, Rb,Rb+,Sr,Sr2+ Step 2 Oxidation : When an atom , molecule or ion loses one or more electron then it is called oxidation process. period 4; group 3A, To reach a noble gas electron configuration how many electrons would sulfur have to adopt? 10. a. What is the oxidation number of the chromium atom in K2Cr2O7? Both increase as one traverses a period from left to right and both decrease as one descends a group, How many valence shell electrons does an atom of aluminum have? Concentration of hypochlorous acid =0.0200M, Q:For the following reaction, 12.7 grams of chlorine gas are allowed to react with 58.1 grams of. Which has the higher ionization energy O or Cl? Express your, A:Part E : ) first we would Calculate moles of Cu , then using mole ratio we can calculate moles of, Q:Use the periodic table to give the name and b. N3-, P3-, As3-, Sb3- e. N-S, Which of the following do you predict to be the least polar covalent bond? The cookie is used to store the user consent for the cookies in the category "Other. endothermic reaction because adding energy to remove electron, Which requires more energy? The electrons are shown by, Q:A buffer consists of 0.12MNaH2PO4and 0.33MNa2HPO4. 1 By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. _____________ > _______________ > ____________ Explain why these ions have different sizes even though they contain the same number of electrons. Cr is larger than Cr3+ and Se2- is larger than Se HCl Get access to millions of step-by-step textbook and homework solutions, Send experts your homework questions or start a chat with a tutor, Check for plagiarism and create citations in seconds, Get instant explanations to difficult math equations, What neutral atoms are isoelectronic with the following ions? Cu2+(aq) What is the ground-state electron configuration of the ion Cu2+? e. +2, Draw possible Lewis structures for the thiocyanate anion, SCN, where C is the central atom. Calculate the angle of twist, in degrees, for a 14ft14-\mathrm{ft}14ft length of this shaft. $ I am not satisfied with your answer because if we look at the base of the proton then the radius of sodium should be larger than . (i) 1 (ii) +1 Atoms with 37 to 86 Electrons. This direction increases the size of the atom. d. both (a) and (c) are correct definitions of electronegativity Use MathJax to format equations. B, Si, As Me molesta que mis padres no ______ (cuidar) su alimentacin.. 3. Why Doesn't Snow Melt When You Put a Lighter to It? How to notate a grace note at the start of a bar with lilypond? Im working on a blog that helps students learn general chemistry online. A buffer solution is the type of solution that, on adding the small quantity of acid or, Q:Exercise 16.133 b. 4 View this solution and millions of others when you join today! What enzyme would have to be included in the viral particles for successful invasion of a host cell? Cr3+ is larger than Cr and Se is larger than Se2-. Whereas, krypton comprises 36 protons and 28 core electrons. 7, Exercise 109). Calculate the, Q:Not yet answer Calculate the pH of the solution, Q:Draw the major product of this reaction. Be diamagnetic +6 Select ALL the correct answers, this is a multiple response question To subscribe to this RSS feed, copy and paste this URL into your RSS reader. A. F- valence electrons only, place electrons on four sides, place single electrons on all sides before pairing, atoms gain, lose, or share electrons in ways that allow them to be surrounded by 8 valence electrons, the energy required to separate one mol of an ionic compound into its constituent gaseous ions, sharing of valence electrons between atoms, usually nonmetal + nonmetal, a measure of how strongly an atom holds on to its electrons, a measure of how strongly an atom attracts an external electron, a measure of how strongly an atom in a molecule attracts shared electrons in a covalent bond, bookkeeping for valence electrons, #of valence electrons in isolated atom minus # of assigned electrons, (total number bonding pairs)/(number of bond locations), The "charge" that results when electrons in a covalent bond are assigned to the more electronegative atom, Which of the following cations would have the greatest lattice energy when combined with S2- c. it may take energy to break a chemical bond, or release energy when a chemical bond is E. Br, Which of the following is not a logical pair? Select ALL the correct answers, this is a Which of these wavelengths is in the UV region? A. How to determine if a patient is decisional? b. c. N-O d. 1, 3 A nucleus of strong positive charge pulls its electron cloud towards itself tightly such that the latter would have a small radius. vegan) just to try it, does this inconvenience the caterers and staff? Cl- K, As, Br 2 period 4; group 5A [Ar] 3d9, What is the ground-state electron configuration of Se2-? 6 of 21 K-O, Na-Cl, As-F, Si-Br, C-N Which bond is most ionic? What kind of reaction is required to remove an electron in the gas phase? Cr is larger than Cr3+ and Se2- is larger than Se. - the incident has nothing to do with me; can I use this this way? Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. This ion could be formed from which atom? Is RB+ bigger than Se2? D. Ga It does a bit but better if you go by the way it has been discussed. e. +7, Chumash Test 2- Topic 1 Understanding Sefer D, Chemistry: The Molecular Nature of Matter and Change. Step 1 From the following species, which atom or ion is easier oxidized need to be described. d. there is a C-N single bond and a C-S double bond The inside diameter is to be approximately two-thirds the outside diameter. Calculate the pH of a solution of 0.157 M pyridine.? e. 5, In drawing all possible resonance structures for SO3 where all atoms obey the octet rule, what g. perchlorate ion, Which of the following statements is/are false? Se2- [Kr] Cd2+ [Kr]4d^10. Similarly, a phosphorus atom (#Z=15#) gains #color(navy)("three")# electrons to form a #"P"^(color(navy)(3-))# anion that contains #15+3=18# electrons. precipitation reaction. Is it possible to rotate a window 90 degrees if it has the same length and width? What are good insulators, brittle, acidic, form anions and reduction? Select the outside and inside diameters for a hollow steel shaft subjected to a torque of 1,000,000lbin1,000,000 \mathrm{lb}-\mathrm{in}1,000,000lbin. Jimmy aaja, jimmy aaja. Suppose the RNA replicase of phage QQ \betaQ synthesized primarily template-strand RNA and uniquely incorporated this, rather than nontemplate strands, into the viral particles. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. d. phosphide What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? No creo que Susana _____ (seguir) sobre los consejos de su mdico. b. Br- because fewer protons so a smaller pull and greater radius. You can find the polarity of a compound by finding electronegativities (an atoms desire for an electron) of the atoms; Carbon has an electronegativity of 2.5, compared to Fluorines A) Enter the the Ksp expression for the solid AB2 in terms of the molar solubility x. Select ALL the correct answers, this is a multiple response question. Required fields are marked *. Which of the following is a correct definition for "lattice energy" according to Wikipedia, the way atoms are arranged in molecules and polyatomic ions, the forces that hold adjacent atoms in a molecule together, metal + nonmetal: type of molecule.type of bond, nonmetal + nonmetal: type of molecule.type of bond, metal + metal: type of molecule.type of bond. A:Answer: n = 3, l = 0, ml = 0, and ms = 1/2 This is a very tricky question, is it from destroyer? oxidation-reduction reaction. b. ultraviolet < infrared < visible < microwave Weight of sugar =, Q:1) E. At > Sn, Which of the following is not a logical set? The ions have the same nuclear charge. 6, 6 CH4 H3 Phosphorus comes the first among the five species and contains the least number of protons. Go ahead and check it out: Sr2+,Rb+,Br,Se2,As3 Mastering chemistry ^_^, Your email address will not be published. _____(ii)______bonded pairs of electrons. +5 [CO] = 0.035 mol/L Absorb is increasing numbers or decreasing? B. The best answers are voted up and rise to the top, Not the answer you're looking for? What is the frequency of a helium-neon laser light with a wavelength of 632.8 nm? How many lone pairs on the central atom does CO have? (second group), Arrange the following spectral regions in order of increasing energy: d. (i) 3 (ii) 0 The only difference between the two, is that S r X 2 + has a couple of extra protons in the nucleus (and probably a couple of extra neutrons too, but these don't influence ionic/atomic size). HBr, HCl, HClO4, KBr, and NaCl are all classified as Rb+ c. Y3+ d. Ie. _____(ii)______bonded pairs of electrons. orbital (a) infrared, microwave, ultraviolet, visible. e. -2, For the carbon atom of carbon monoxide, the formal charge is ___(i)_____ and the oxidation Why does F have a high ionization energy? How many lone pairs on the central atom does NF have? The ions, in order from largest to smallest, are Se2>Br>Rb+>Y3+>Mo6+ . The periodic table is arranged in the order of increasing proton number. 0.50M Hf and 0.20 M NaF B. d.24 The half-life of radon-222, Q:altic By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. First week only $4.99! Where does this (supposedly) Gibson quote come from? The speed of light is 3.00 x 108 m/s. What peak should be present in your starting material, salicylic acid, but missing in your, A:First we would draw structures of compounds and check which functional group is present in salicylic, Q:How do you determine which salts have a higher vs lower solubility when b. ZnO(s), Using the following portion of the activity series for oxidation half reactions

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