Metallurgy Questions

Inorganic Chemistry

Metallurgy Solutions

1.49 moles of hydrogen gas are reacted with excess carbon monoxide according to the reaction below. If 15.5 grams of methanol (CH₂OH) are produced, what was the percent yield? 2 H₂(g) + CO(g) → CH₃OH(l) (A) 59.1 % (B) 64.9 % (C) 68.5 % (D) 72.3 % (E) 79.19% (F) 45.9 %

Inorganic Chemistry

Metallurgy Solutions

Q9.21 - Level 1 Unanswered • 1 attempt left Match the solvent to the type of reaction the solvent helps to promote. © Drag and drop options on the right-hand side to reorder and match with items on the left. Reordering may cause items on the right-hand side to swap positions. SN2 Dimethylformamide (DMF) III = SN2 Hexamethylphospho ramide (HMPA) III Ethanol Sn1 III Ammonia SN2 III SN1 III Sn1 = Sn1 III

Inorganic Chemistry

Metallurgy Solutions

20 1 point Air is a mixture of gases. What is the total pressure of the atmosphere if the partial pressure of nitrogeni k 590 mmHg, the partial prevure changent 10 meter and the partial pressure of argon is 8 mmHg? type your answer... 5 Stranit Previous 6

Inorganic Chemistry

Metallurgy Solutions

For the following statements (1) Cast iron is purest form of commercial iron (2) The temperature in reduction of zinc oxide (using coke) is higher than Copper oxide (3) Copper is used for galvanising iron (4) The metal which is liquid at room temperature is refined by zone refining Choose the correct sequence where I represents true and F represent false. O TTET O TTFF O FTFF O TETT

Inorganic Chemistry

Metallurgy Solutions

Question 10 of 10 1 Points 1. Draw an arrow to show which direction solvent will diffuse across the membrane. Water will flow 0.3 OSM cell 0.5 osM solution 2. What will happen to the cell ? 3. Is this dialysis, osmosis, or neither ? u. increase V. decrease w. dialysis X. Osmosis y. shrinkage Z. swelling Cc. out of the cell dd, neither aa, equilibrium, in and out of the cell bb. into the cell

Inorganic Chemistry

Metallurgy Solutions

Select all of the correct statements about equilibrium from the choices below. At equilibrium the rates of forward and reverse reactions are equal. As a reaction proceeds backwards toward equilibrium the product concentrations drop. At equilibrium the reverse rate equals zero. At equilibrium the forward rate equals zero. At equilibrium concentrations of reactants and products stay constant. At equilibrium the forward rate constant equals zero.

Inorganic Chemistry

Metallurgy Solutions

11. Write the equilibrium constant for the following reversible reactions.(3 points for the first two equations, 4 for the third equation, 10 points total) a. N2(g) + 3H2(g) 2NH3 (9) b. CS2 (g) + 4H2(g) → 2H2S(9) + CH4(9) + + c. Ag2CO3 (s) + 2 H+(aq) + 2 Cl(aq) +2AgCl(s) + CO2(g) + H2O(C) + 2

Inorganic Chemistry

Metallurgy Solutions

Zinc, Zn, is more easily oxidized than copper, Cu. What happens the moment after metal strips of these metals come into contact with each other? o The zinc metal begins to turn a greenish color indicating the presence of the formation of cupric oxide, Cuo. o The zinc metal immediately begins depositing electrons onto the surface of the copper, thus coating the copper with a white powder of zinc oxide, Zno. Nothing happens. An immediate build up of charge in either material prevents continued oxidation-reduction from occurring. o The surface of the copper appears moist and cloudy as the zinc metal oxidizes and gets dissolved into Zn(aq) ions.

Inorganic Chemistry

Metallurgy Solutions

14. Carbon, oxygen and water can combined to produce formic acid. Using Hess' law and the three thermochemical equations, calculate the AH of reaction for this reaction (10 points) 2C(s) + O2(g) + 2H2O(l) → 2 H2CO2(e) AH = Data C(s) + 12 O2(g) → CO(9) AH rxn = -110.5 kJ H2CO2(0) H2CO2(g) AH rxn = +62.9 kJ CO(g) + H2O() → H2CO2(g) AH rxn = +33.7 kJ

Inorganic Chemistry

Metallurgy Solutions

4. Acetylene reacts with oxygen by the following balanced chemical reaction. 2 C2H2(g) + 502(g) → 4CO2(g) + 2 H2O(g) If 55.0 grams of Oz is reacted with an excess of C2H2 (O2 is the limiting reagent), how many grams of CO2 are produced and how many grams of H20 are produced? (10 points)

Inorganic Chemistry

Metallurgy Solutions

✓ Correct The Lewis structure for a molecule allows you to predict its shape, bond angles, and hybridization based on the number of electron groups on the central atom. Electron Molecular Angle groups geometries Hybrid orbitals (degrees) Part B 2 linear 180 sp What the molecular shape (geometry) of CHCI 3 trigonal planar, bent 120 sp? ► View Available Hint(s) 4 tetrahedral, trigonal pyramidal, bent 109.5 sp3 linear trigonal planar 5 spºd tetrahedral trigonal bipyramidal, seesaw, 90, 120, 180 T-shaped octahedral, square pyramidal, 90, 180 square planar trigonal pyramidal 6 spºd O bent 0 0 0 0 0 0 0 0 0 0 0 trigonal bipyramidal T-shaped seesaw octahedral square pyramidal square planar Submit Previous Answers X Incorrect; Try Again; 4 attempts remaining Check the number of lone pairs on the central atom. You may want to review Hint 1. Table of molecular shapes.

Inorganic Chemistry

Metallurgy Solutions

= = (13) Consider the reaction 2NO(g) + 2H2 (g) = N2 (g) + 2H20 (g) At equilibrium and at ambient temperature [NO (g)] = 8.1x10-3 M, [H2 (g)] = 4.1 x 10-5M, [N2 (g)] = 5.3 x 10-2M, and [H20 (g)] = 2.9 x 10-3M. x The Kc for this reaction is (a) 2.5 x 10-7(b) 4.0x 106 (c) 4.6x 102 (d) 100% (e) None =