Homework Answers
Trace elementa are those elements which are required in small
amounts.
Hence last option is the
correct answer.
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Question 1 Which of the following cations is not a trace species in the human body?...
For the following, assign oxidation numbers. Which species is oxidized and which is reduced? Which species...
For the following, assign oxidation numbers. Which species is oxidized and which is reduced? Which species is the oxidizing agent and which is the reducing agent? (A) Zn(s) + CuCl2(aq) Cu(s) + ZnCl2 (B) MnO2 (s) + 4H+(aq) + 2Cl-(aq) Mn2+(aq) + 2H2O(l) + Cl2(g) (C)Zn(s) + 2HCl(aq)ZnCl2(aq) + H2(g)
Which of the following species can reduce Pb2+? See attached table!SRP.docx O a cu O b....
Which of the following species can reduce Pb2+? See attached table!SRP.docx O a cu O b. Ag OC. Be2 O d. mg
Pick one of the trace elements (As, B, Cr, Mo, Co, Cu, F, I, Fe, Mn,...
Pick one of the trace elements (As, B, Cr, Mo, Co, Cu, F, I, Fe, Mn, Ni, Se, Si, Zn) and research why it is needed in the body. From what dietary sources do we obtain the nutrient and how much do we need? What is the recommended daily intake of the trace element, and what symptoms result from its deficiency? Be sure to cite your sources using APA.
t is speculated that arsenic (yes, arsenic!) may be an ultra-trace element in the human body,...
t is speculated that arsenic (yes, arsenic!) may be an ultra-trace element in the human body, meaning we need it to survive. Nutritionists estimate that a 75.0-kg person may have as much as 12 micrograms of As in their body. What is the concentration of As in ppb? Give your answer to two significant figures. Answer in (ppb As)
In an electrochemical cell composed of Zn(s)|Zn2+|| Cu2+, Cu(s), Which species is the oxidizing agent? Which...
In an electrochemical cell composed of Zn(s)|Zn2+|| Cu2+, Cu(s), Which species is the oxidizing agent? Which species is the reducing agent? In an electrochemical cell composed of Zn(s)| Zn2+1| Cu2+|Cu(s), Which electrode could be replaced with an inert electrode (such as Pt)? Which species is the anode? Which species is the cathode?
Question 23 The standard reduction potential of H,O2 = +1.763 V. Which of the following species...
Question 23 The standard reduction potential of H,O2 = +1.763 V. Which of the following species will be oxidized by hydrogen peroxide? End Co?"(aq) - Col(aq) +26 Ag(s) - Ag (aq) + € Co(s) - Co2+(aq) +26 Zn(s) -- Zr? (aq) + 2€ Na(s) Na (aq) + +1.953 V +0.799 V -0.282 V -0.762 V -2.714 V Ag(s), Co(s), Zn(s), and Na(s) Co- and Ag(s) Co(s) and Co2+ Zn(s) and Na(s) Code
Which chemical species is reduced in a voltaic cell represented by the the following cell diagram?...
Which chemical species is reduced in a voltaic cell represented by the the following cell diagram? Zn(s) | Zn2+(aq) || H+(aq), HCOOH(aq) | CO2(g) | Pt(s) CO2(g) Zn(s) H(aq) Zn2+(aq) OHCOOH(aq)
Determine the oxidation numbers of each atom in the following species H= C= C2H4 O =...
Determine the oxidation numbers of each atom in the following species H= C= C2H4 O = CO2 C= O Cu= CuO O = N = НЕ HNO3 N = NO2 N = Cu(NOs)2 Cu CraO,2 Cr= С 3 Mg = MgC2O4 O = Оз F = O = Xe ХеOFz O = H= Н202
For each of the following, circle the species from the list on the right that would...
For each of the following, circle the species from the list on the right that would form the strongest interaction with the substance on the left F- Fe2+, Cu+, Br2, H+ I- Be2+, I2, BF3, Au+ SCN- H+, Cr3+, Pt2+, Na+
1) Assign Oxidation States every element in each of the following species: i) NaMnO4 iv) SF...
1) Assign Oxidation States every element in each of the following species: i) NaMnO4 iv) SF ii) Cu(CIO4)2 v) LiH iii) Cl2 vi) H2O2 2) 3) 2HBr(aq) + Cds CdBr2(aq) + H2(g) Element Oxidized: Element Reduced: Balance the following redox reaction in acidic solution: Cr2O72- + C2H5OH → Cr + CO2
Which of the following species can reduce Pb2+? See attached table!SRP.docx O a cu O b. Ag OC. Be2 O d. mg
In an electrochemical cell composed of Zn(s)|Zn2+|| Cu2+, Cu(s), Which species is the oxidizing agent? Which species is the reducing agent? In an electrochemical cell composed of Zn(s)| Zn2+1| Cu2+|Cu(s), Which electrode could be replaced with an inert electrode (such as Pt)? Which species is the anode? Which species is the cathode?
Question 23 The standard reduction potential of H,O2 = +1.763 V. Which of the following species will be oxidized by hydrogen peroxide? End Co?"(aq) - Col(aq) +26 Ag(s) - Ag (aq) + € Co(s) - Co2+(aq) +26 Zn(s) -- Zr? (aq) + 2€ Na(s) Na (aq) + +1.953 V +0.799 V -0.282 V -0.762 V -2.714 V Ag(s), Co(s), Zn(s), and Na(s) Co- and Ag(s) Co(s) and Co2+ Zn(s) and Na(s) Code
Which chemical species is reduced in a voltaic cell represented by the the following cell diagram? Zn(s) | Zn2+(aq) || H+(aq), HCOOH(aq) | CO2(g) | Pt(s) CO2(g) Zn(s) H(aq) Zn2+(aq) OHCOOH(aq)
Determine the oxidation numbers of each atom in the following species H= C= C2H4 O = CO2 C= O Cu= CuO O = N = НЕ HNO3 N = NO2 N = Cu(NOs)2 Cu CraO,2 Cr= С 3 Mg = MgC2O4 O = Оз F = O = Xe ХеOFz O = H= Н202
1) Assign Oxidation States every element in each of the following species: i) NaMnO4 iv) SF ii) Cu(CIO4)2 v) LiH iii) Cl2 vi) H2O2 2) 3) 2HBr(aq) + Cds CdBr2(aq) + H2(g) Element Oxidized: Element Reduced: Balance the following redox reaction in acidic solution: Cr2O72- + C2H5OH → Cr + CO2
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