Science/Math Questions & Answers

Q: Which of the following represents a chemical property of hydrogen gas? It is gaseous at room temperature. It is tasteless. It is less dense than air. It reacts explosively with oxygen. It is colourless. What answer should be reported, with the... Posted 2 months ago

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Q: For the following reaction, Kc= 255 at 1000 K.CO(g)+Cl2(g)<--> COCl2(g). A reaction mixture initiallycontains a CO concentration of 0.1450 M and Cl2 concentration of0.177 M at 1000 K. a.) What is the equilibrium concentration of CO at 1000... Posted 2 months ago

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Q: Which of the following reactions is associated with the latticeenergy of Li2O (HÂ°latt)? A. Li2O(s)---->2 Li+(g) + O2-(g) B. 2 Li+(aq) + O2-(aq)---->Li2O(s) C. 2 Li+(g) + O2-(g)----->Li2O(s) D. Li2O(s)---->2 Li+(aq) + O2-(aq) E. 2Li(s) +... Posted 2 months ago

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Q: Which of the following reactions are spontaneous(favorable)? Which of the following reactions are spontaneous (favorable)? Check all spontaneous reactions. Reaction A Reaction B Reaction C Reaction D Reaction E Reaction F Posted 2 months ago

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Q: Which of the following solutions can not act as a buffer? A. KCN/HCN B. NaI/HI C. Na2SO4/NaHSO4 D. Na3PO4/Na2HPO4 E. NH3/NH4NO3 Posted 2 months ago

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Q: For the following reaction , KClO ---> KCl + 1/2 O2 , assign oxidation states to each element on each side of the equation. K: Reactants___?, Products____? Cl: Reactants___?, Products____? O: Reactants___?, Products____? Which element is oxidized?... Posted 2 months ago

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Q: Which of the following reagents wouldoxidize? 1) Which of the following reagents wouldoxidize Cr to Cr2 , but not Ag to Ag ? A) Co^2+ B) Ca^2+ C) Br^- D) Co E) Ca F) Br2 2) Which of the following reagents would oxidize Cu to Cu2 , butnot Au to Au3... Posted 2 months ago

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Q: For each of the following sets of atoms and ions, arrangethemembers in order of increasing size. Rank from smallest to largest. To rank items as equivalent,overlapthem. Se, Te2-. and Se2- Fe2+, Fe3+, and Mn2+ Ti4+, Sc3+, and Ca Posted 2 months ago

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Q: Please help with the following question. Thank you! Which of the following solutions is a buffer? Check all that apply. a solution made by mixing 100 mL of 0.100 M HF and 50 mL of 0.100 M NaOH a solution made by mixing 100 mL of 0.100 M HF and 50 mL... Posted 2 months ago

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Q: Which of the following reactions can be used to prepare 3-methyl-3-hexanol, What is the IUPAC name for the following compound? Posted 2 months ago

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Q: Which of the following represent potentialenergy? a candy bar wind a roller coaster at the top of ahill rowing a boat a ball rolling down a hill a stretched rubber band Posted 2 months ago

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Q: Which of the following solutions is a buffer? Check all that apply. A solution made by mixing 100 mL of 0.100 M HCOOH and500 mL of 0.100 M NaOH. A solution made by mixing 100 mL of 0.100 M HCOOH and50 mL of 0.100 M NaOH. A solution made by mixing... Posted 2 months ago

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Q: For the following reaction KClO3---->KCl+3/2 O2 assignoxidation states to each element on each side of theequation...reactants and products. Which element is oxidized? Whichelement is reduced? Posted 2 months ago

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Q: The following reaction is a single-step, bimolecularreaction: CH 3 Br +NaOH --> CH 3 OH +NaBr When the concentrations of CH3Br and NaOH are both 0.125 M, therate of the reaction is 0.0060 M/s a. What is the rate of the reaction if the... Posted one month ago

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Q: For each of the following reactions, calculate ? H ?rxn,? S ?rxn, ? G ?rxn at 25 ?C. State whether or not thereaction is spontaneous. If the reaction is not spontaneous, woulda change in temperature make it spontaneous? If so, should... Posted 2 months ago

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Q: The following reaction is a single-step, bimolecularreaction: The following reaction is a single-step, bimolecular reaction: CH3Br+ NaOH rightarrow CH3OH + NaBr When the concentrations of CH3Br and NaOH are both 0.140 M, the rate of the reaction is... Posted 2 months ago

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Q: Which of the following reactions is associated with the lattice energy of Li2O (Delta H degree latt)? 2Li+(aq) + O2-(aq) rightarrow Li2O(s) 2Li+(g) + O2-(g) rightarrow Li2O(s) Li2O(s) rightarrow 2Li+(g) + O2-(g) 2Li(s) + 1 / 2O2(g) rightarrow Li2O(s)... Posted 2 months ago

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Q: For the following reaction, indicate which reactant is the Lewis acid and which is the Lewis base. Banzene is the Lewis acid. Banzene is the Lewis base. Br* is the Lewis acid. Br* is the Lawis base. This not a Lewis acid-base reaction. Posted 2 months ago

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Q: In which of the following reactions will Kc = Kp? In which of the following reactions will Kc = Kp? CH4(g) + H2O(g) ? CO(g) + 3 H2(g) N2(g) + 3 Cl2(g) ? 2 NCl3(g) CO(g) + 2 H2(g) ? CH3OH(g) H2(g) + I2(g) ? 2 HI(g) N2O4(g) ? 2NO2(g) Posted 2 months ago

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Q: Which of the following reactions would you predict to have the smallest orientation factor? X_2+y_2 rightarrow 2xy NOCI_2+NO rightarrow 2NOCI N_2 + O_2 rightarrow 2 NO N+ O_2 rightarrow NO_2 All of these reactions should have nearly identical... Posted 2 months ago

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Q: Of the following solutions, which has the greatest bufferingcapacity? A) 0.296 M HF and 0.122 M NaF B) 0.195 M HF and 8.02Ã—10âˆ’2 M NaF C) 0.591 M HF and 0.243 M NaF D) 1.18 M HF and 0.486 M NaF E) They are all buffer solutions and would all have... Posted 2 months ago

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Q: The following reaction was performed in a sealed vessel at 724*C: H2(g)+I2(g)?2HI(g) Initially, only H2 and I2 were present at concentrations of[H2]=3.85M and [I2]=2.85M. The equilibrium concentration of I2 is0.0800M . What is the equilibrium... Posted 2 months ago

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Q: The following reaction is exothermic. C6H12O6( s )+6O2( g )?6CO2( g )+6H2O( g ) Predict the effect (shift right, shift left, or no effect) ofincreasing and decreasing the reaction temperature. Part A Predict the effect (shift right, shift left, or... Posted 2 months ago

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Q: Of the following solutions, which has the greatest bufferingcapacity? 0.285 M HF and 0.162 M NaF 0.570 M HF and 0.323 M NaF 1.14 M HF and 0.646 M NaF 0.188 M HF and 0.107 M NaF They are all buffer solutions and would all have the samecapacity. Posted 2 months ago

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Q: Which of the following sets of quantum numbers refers to a 4d orbital? n - 2,l = 1. m_t = -1 n - 2,l = 4. m_t = -1 n - 4,l = 2. m_t = -1 n - 4,l = 3. m_t = - 0 n - 4,l = 3. m_t = +2 Which of the following diagrams represent p-orbitals? 1 only 2 only... Posted 2 months ago

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Q: Which of the following reagents would oxidize Zn to Zn2+, butnot Sn to Sn2+? Br2 Br- Ca^2+ Co^2+ Ca Co Which of the following reagents would oxidize I- to I2, but notF- to F2? Br2 Co Ca Ca^2+ Br- Co^2+ Posted 2 months ago

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Q: For each of the following reactions, identify another quantity that is equal to DeltH degree rxn. CH4(g) + 2O2(g) rightarrow CO2(g) + 2h2O(i) enathalpy of combustion of CH4 enthaply of formation of CO2(g) 4x bond energy of C - H - 4x bond energy of C... Posted 2 months ago

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Q: Which of the following reactions will occur spontaneously aswritten? 3Fe (s) + 2Cr3+ (aq) ? 2Cr (s) + 3Fe2+ (aq) Sn4+ (aq) +Fe2+ (aq) ? Sn2+ (aq) + Fe (s) Sn4+ (aq) + Fe3+ (aq) ? Sn2+ (aq) +Fe2+ (aq) 3Sn4+ (aq) + 2Cr (s) ? 2Cr3+ (aq) + 3Sn2+ (aq)... Posted 2 months ago

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Q: The following reaction can be written as the sum of tworeactions, one of which relates to ionization energy and one ofwhich relates to electron affinity: Rb(g)+I(g)?Rb+(g)+I?(g) Part A What is the reaction that corresponds to the first... Posted 2 months ago

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Q: Which of the following are redox reactions. For those that are,indicate which element is oxidized and which is reduced. For thosethat are not, indicate whether they are precipitation orneutralization reactions. a.) P4 + 10 HClO + 6H2O = 4H3PO4 +... Posted 2 months ago

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Q: For the following reaction: KClO2-->KCl + O2 assign oxidation states to each element on each side of theequation. I tried +5 for K, -1 for Cl and -4 for O on the reactants side, butmy homework says it's wrong. Don't know what I'm doing wrong.... Posted 2 months ago

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Q: Which of the following solutions is the most concentrated? a. 0.5 L of a 3 molar solution b. 3.0 L of a 0.5 molar solution c. 2.0 L of a 1 molar solution d. 0.5 L of a 1 molar solution e. 2.0 L of a 2 molar solution Posted 2 months ago

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Q: Which of the following solutionsis a buffer? A- A solution made by mixing 100 mL of 0.100 M KClOand 50 mL of 0.100 M KCl. B- A solution made by mixing 100 mL of 0.100 M HClOand 500 mL of 0.100 M NaOH. C- A solution made by mixing 100 mL of 0.100 M... Posted 2 months ago

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Q: For which of the following reactions will KC = KP ? A. 2 H2 (g) +O2 (g) â‡„ 2 H2O (g) B. Br2 (l ) + C2H4 (g) â‡„C2H4Br2 (g) C. 3 N2O (g) â‡„ 3N2 (g) + O3 (g) D. CaCO3 (s) â‡„CaO (s) + CO2 (g) E. KC is equal to KP for morethan one of the... Posted 2 months ago

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Q: a) Which of the following reagents would oxidize Zn to Zn2 , butnot Ag to Ag ? b) Which of the following reagents would oxidize Ag to Ag , butnot Au to Au3 ? to the a table of standard reduction potentials, determine the best answer to the... Posted 2 months ago

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Q: Which of the following reactions are spontaneous (favorable)? 2Mg(s )+ O2(g) rightarrow 2MgO (s) delta G = - 1137 kJ / mol NH3(g)+ HCl(g ) rightarrow NH4 Cl(s) delta G = - 91.1 kJ / mol AgCl(s) rightarrow Ag+ (aq) + Cl-[aq) delta G = 55.6 kJ / mol... Posted 2 months ago

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Q: The following reaction is a single-step, bimolecular reaction: CH3Br+NaOH--->CH3OH+NaBr. When the concentrations of CH3Br and NaOH are both 0.170 M, the rate of the reaction is 0.0090 M/s. (a) What is the rate of the reaction if the concentration of... Posted 2 months ago

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Q: Which of the following mixtures may be act as a buffersolution? A) HBr, NaBr B) HF, NaF C) HCl, NaCl D) HI, NaI Posted 2 months ago

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Q: Name the following Monosaccharides me the following monosaccharides by placing the appropriate terms. CH2OH OH CH2OH H,OH OH OH CH2OH OH OH fructo galacto gluco pyranose ranaseD furanose Posted 2 months ago

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Q: 1. which are diffusion and effusion? What are each of the following observations an example of? Drag the appropriate items to their respective bins. Posted 2 months ago

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Q: Which of the following are oxoacids (also known as oxyacids)? Check all that apply. Posted 2 months ago

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Q: Whichof the following pairs of compounds are enantiomers (opticalisomers)? Posted 2 months ago

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Q: Which of the following is a postulate of the kinetic moleculartheory of gases? Which of the following is a postulate of the kinetic molecular theory of gases? The volume occupied by the individual particles that compose a gas is very small. However,... Posted 2 months ago

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Q: Which of the following molecules are polar? NH_3, Cl_2, CO_2, CO, and HCl? Posted 2 months ago

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Q: Which of the following pairs exhibit an ion-dipoleinteraction? CH3OH and Na CH3CH2OH and H2O Clâ€“ and K CH3CH2CH2CH2CH3 and CH3CH2CH2CH2COOH Posted 2 months ago

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Q: Which of the following molecules has a net dipole moments? BeCl_2 SF_2 KrF_2 CO_2 CCl_4 A molecule which contains polar bonds will always have a dipole moment. True False The best Lewis structure for sulfuric acid has zero formal chaser, sulfur as... Posted 2 months ago

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Q: Which of the following mixtures would result in a buffered solutionwhen 1.0 L of each of the two solutions are mixed? a. 0.2 M HNO3 and 0.4 M NaNO3 b. 0.2 MHNO3 and 0.4 M HF c. 0.2 M HNO3 and 0.4 M NaF d. 0.2 M HNO3 and 0.4 M NaOH Please show with... Posted 2 months ago

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Q: Which of the following is not a property of an acid? 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. Posted 2 months ago

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Q: Which of the following are oxoacids (also known as oxyacids)? Check all that apply. HF hydrochloric acid chloric acid HCN H_3PO_4 Ba(OH)_2 nitrous acid Posted 2 months ago

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Q: For the following reaction: 1) Add Curved arrows for the first step. 2) Draw both the organic and inorganic intermediate species. Include nonbonding electrons and charges, where applicable. Add a curved arrow to show how the final product is formed. Posted 2 months ago

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Science/Math Questions & Answers | Transtutors (2024)

Science/Math Questions & Answers