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Magnetite is a magnetic iron ore. Its formula is Fe3O4. (a) Construct a pair of conversion...
19. For the conversion of iron ore to iron metal, given in the equation FeOo) +CO)Fe)...
19. For the conversion of iron ore to iron metal, given in the equation FeOo) +CO)Fe) +C020) (a) (12 points) Calculate ΔΗ0m from the following equations 3 Fe2。3(a) +COO) → 2 Fe3O4(s) + CO2(s) Δ11 17.0 kJ/mol Fe2O3(s) + 3 COG) -+ 2 Fe(a) + 3 COag) ΔΗ,,-25.0 kJ/mol Fesos)+C)3 FeO)+Co) A +19.0 kJ/mol (b) (2 pointsa) Is this reaction endothermic or exothermic? (e) (6 pointa) What is the heat of formation in kJ/mol for FeOsgiven that Ally for FeO)...
16. How many grams of steam and iron must react to produce 375 g of magnetic...
16. How many grams of steam and iron must react to produce 375 g of magnetic iron oxide, Fe3O4? 3 Fe(s) + 4 H2O(g) Fe3O4(s) + 4 H2(g) 18. Mercury can be isolated from its ore by the reaction 4 HgS + 4 CaO → 4 Hg + 3 CaS + CaSO4 (a) How many moles of CaS are produced from 2.5 mol CaO? (b) How many grams of Hg are produced along with 9.75 mol of CaSO4? (c) How many...
problem set 6 2. Magnetite Fe,O, is an iron containing ore. How many moles of iron...
problem set 6
2. Magnetite Fe,O, is an iron containing ore. How many moles of iron atoms would be found in 2.5 moles of magnetite? How many atoms of iron would this be? Show all work 3. Consider the following pairs. For each pair, circle the quantity that contains the greater number of atoms or molecules Then explain your reasoning a) 1 mole Na or 1 gram Na b) 1 molecule of lz or 1 mole of la C) 58.9...
7. Iron is produced from its ore by the reactions: 2C(s) + O2(g) → 2CO(g) Fe2O3...
7. Iron is produced from its ore by the reactions: 2C(s) + O2(g) → 2CO(g) Fe2O3 (s) + 3 CO(g) → Fe(s) + CO2(g) How many moles of O2(g) are needed to produce 4.6 moles of Fe(s)? a. 2.3 b. 3.5 C. 4.6 d. 6.9 e. 13.8
8) Iron ore is reduced to iron with coke (impure carbon). Calculate the mass of Fe...
8) Iron ore is reduced to iron with coke (impure carbon). Calculate the mass of Fe that can be produced from Fe2O3 with 15.00 kg of carbon. The reaction may be represented as follows: Fe2O3(s) + 3 C(s) + heat → 2 Fe(l) + 3 CO(g) 9) Given the following reaction: Na2S2O3 + AgBr → NaBr + NasſAg(S203)2] a. How many moles of Na2S2O3 are needed to react completely with 42.7 g of AgBr?! þ. What is the mass of...
conversion factors needed: molar masses of O, and Ho, and molar ratio between Ozand Ho. Molar mass Oz: 2 x 16.00 g/...
conversion factors needed: molar masses of O, and Ho, and molar ratio between Ozand Ho. Molar mass Oz: 2 x 16.00 g/mol = 32.00 g/mol Molar mass HO: (2x 1,01 g/mol)*16.00 /mol 7HO-1.5 80xmor 2 mol No1802 1,0 52.00 gomolo 1 .689 = 1.7 HO Now let's try some problems Be sure to give your answers with the correct number of significant figures. 1. Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs,...
19) Iron is produced from its one by the reactions 2 C O 2 Fe:O )...
19) Iron is produced from its one by the reactions 2 C O 2 Fe:O ) CO 2 es 3COAR) How many moles of Ol) are needed to produce 1 mole of Fe(s)? a) 1/2 mole o 1/4 moto 1 mole O d) 3/2 moleo 20) Iron (1) sulfate reacts with potassium hydroxide in aqueous solution to form a precipitate. The net lonic equation for this reaction is: a) Fel. 50. Feso, 2 50, SO. c)Fe +20 Feco ). d)...
31). 31) To convert a given number of moles into the number of atoms, one would...
31). 31) To convert a given number of moles into the number of atoms, one would multiply by which of the following factors? A) 1.66 x 10-24 atoms/1 mol B) 1 mol/6.022 x 1023 atoms C) molar mass D) 6.022 x 1023 atoms/1 mol E) 1 mol/1.66 x 10-24 atoms 32) 32) How many atoms of sulfur are present in a 155 g sample of sulfur? [Molar mass: S, 32.06 g/mol] A) 6.02 x 1023 atoms B) 2.91 x 1023...
4.30. Using solubility rules, predict the solubility in water of the following ionic compounds. a. AI(OH) b. CaN...
4.30. Using solubility rules, predict the solubility in water of the following ionic compounds. a. AI(OH) b. CaN C. NH4CI d. KOH 4.32. Using solubility rules, decide whether the following ionic solids are soluble or insoluble in water. If they are soluble, write the chemical equation for dissolving in water and indicate what ions you would expect to be present in solution. (NE SO b. BaCO c. Pb(NOs)2 d. Ca(OH) 4.34. Write net ionic equations for the following molecular equations....
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the...
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) 1) One mole of any substance contains Avogadro's number of particles of that substance. What is the numerical value of Avogadro's number? A) 12.01 23 Avagrans t Male aton 6022 x1o atums B) 6.022 x 1023 C) 6.022 x 10-23 D) 1.661 x10-24 E) 1.00 x10-14 2) What is the mass of 4.00 moles of helium, the gas commonly used to fill...
19. For the conversion of iron ore to iron metal, given in the equation FeOo) +CO)Fe) +C020) (a) (12 points) Calculate ΔΗ0m from the following equations 3 Fe2。3(a) +COO) → 2 Fe3O4(s) + CO2(s) Δ11 17.0 kJ/mol Fe2O3(s) + 3 COG) -+ 2 Fe(a) + 3 COag) ΔΗ,,-25.0 kJ/mol Fesos)+C)3 FeO)+Co) A +19.0 kJ/mol (b) (2 pointsa) Is this reaction endothermic or exothermic? (e) (6 pointa) What is the heat of formation in kJ/mol for FeOsgiven that Ally for FeO)...
problem set 6
2. Magnetite Fe,O, is an iron containing ore. How many moles of iron atoms would be found in 2.5 moles of magnetite? How many atoms of iron would this be? Show all work 3. Consider the following pairs. For each pair, circle the quantity that contains the greater number of atoms or molecules Then explain your reasoning a) 1 mole Na or 1 gram Na b) 1 molecule of lz or 1 mole of la C) 58.9...
7. Iron is produced from its ore by the reactions: 2C(s) + O2(g) → 2CO(g) Fe2O3 (s) + 3 CO(g) → Fe(s) + CO2(g) How many moles of O2(g) are needed to produce 4.6 moles of Fe(s)? a. 2.3 b. 3.5 C. 4.6 d. 6.9 e. 13.8
8) Iron ore is reduced to iron with coke (impure carbon). Calculate the mass of Fe that can be produced from Fe2O3 with 15.00 kg of carbon. The reaction may be represented as follows: Fe2O3(s) + 3 C(s) + heat → 2 Fe(l) + 3 CO(g) 9) Given the following reaction: Na2S2O3 + AgBr → NaBr + NasſAg(S203)2] a. How many moles of Na2S2O3 are needed to react completely with 42.7 g of AgBr?! þ. What is the mass of...
conversion factors needed: molar masses of O, and Ho, and molar ratio between Ozand Ho. Molar mass Oz: 2 x 16.00 g/mol = 32.00 g/mol Molar mass HO: (2x 1,01 g/mol)*16.00 /mol 7HO-1.5 80xmor 2 mol No1802 1,0 52.00 gomolo 1 .689 = 1.7 HO Now let's try some problems Be sure to give your answers with the correct number of significant figures. 1. Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs,...
19) Iron is produced from its one by the reactions 2 C O 2 Fe:O ) CO 2 es 3COAR) How many moles of Ol) are needed to produce 1 mole of Fe(s)? a) 1/2 mole o 1/4 moto 1 mole O d) 3/2 moleo 20) Iron (1) sulfate reacts with potassium hydroxide in aqueous solution to form a precipitate. The net lonic equation for this reaction is: a) Fel. 50. Feso, 2 50, SO. c)Fe +20 Feco ). d)...
31). 31) To convert a given number of moles into the number of atoms, one would multiply by which of the following factors? A) 1.66 x 10-24 atoms/1 mol B) 1 mol/6.022 x 1023 atoms C) molar mass D) 6.022 x 1023 atoms/1 mol E) 1 mol/1.66 x 10-24 atoms 32) 32) How many atoms of sulfur are present in a 155 g sample of sulfur? [Molar mass: S, 32.06 g/mol] A) 6.02 x 1023 atoms B) 2.91 x 1023...
4.30. Using solubility rules, predict the solubility in water of the following ionic compounds. a. AI(OH) b. CaN C. NH4CI d. KOH 4.32. Using solubility rules, decide whether the following ionic solids are soluble or insoluble in water. If they are soluble, write the chemical equation for dissolving in water and indicate what ions you would expect to be present in solution. (NE SO b. BaCO c. Pb(NOs)2 d. Ca(OH) 4.34. Write net ionic equations for the following molecular equations....
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) 1) One mole of any substance contains Avogadro's number of particles of that substance. What is the numerical value of Avogadro's number? A) 12.01 23 Avagrans t Male aton 6022 x1o atums B) 6.022 x 1023 C) 6.022 x 10-23 D) 1.661 x10-24 E) 1.00 x10-14 2) What is the mass of 4.00 moles of helium, the gas commonly used to fill...
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