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Calculate mole: Mercury used to be prepared in the laboratory by heating mercuric oxide.?

• Mercury used to be prepared in the laboratory by heating mercuric oxide. 2 HgO (s) -> 2Hg (l) + O2 (g) When 1.25 g of mercuric oxide is heated, what is the theoretical yield of mercury? Choose one answer. a. 0.89 g b. 1. 09 g c. 1.16 g d. 2.34 g ..The number of random questions required is more than are still available in the category! .Question 3 Write the balanced equation and determine the mass of water required to produce 35 g of gaseous hydrogen? Choose one answer. a. 245 g b. 312 g c. 315 g d. 200 g ..Question 4 For the following unbalanced chemical equation, suppose exactly 5.0 g of each reactant is taken. Which reactant is limiting? Zn + CuSO4 -> ZnSO4 + Cu Choose one answer. a. Zn b. CuSO4 ..Question 5 Calculate the volume occupied by 3.5 moles of gaseous methane at NTP conditions. (1 point) Choose one answer. a. 56 L b. 57 L c. 62 L d. 78 L ..Question 6 Calculate the number of moles contained in 8.99 mg of Fe2O3 (4 points) Choose one answer. a. 5.6 x 10-7 moles b. 5.6 x 10-6 moles c. 5.6 x 10-5 moles d. 5.9 x 10-5 moles ..Question 7 2KClO3 -> 2KCl + 3O2 2 mol 2 mol 3 mol Use the reaction above to determine the number of moles of KCIO3 required to produce 0.69 moles of O2. Choose one answer. a. 0.09 mol b. 0.46 mol c. 1.45 mol d. 5.23 mol ..Question 8 Calculate the total number of molecules in 3.56 moles of N2O. (1 point) Choose one answer. a. 2.09 x 1024 b. 2.14 x 1024 c. 2.54 x 1023 d. 5.76 x 1023 ..Question 9 A compound is constituted by mass of 52.1% carbon and 13.1% hydrogen, the rest being oxygen. Given that a volume of 5.33 L of this gas has a mass of 11.5 g at 13 °C and 110 kPa, find the molecular formula for this compound. Choose one answer. a. C4H6O b. C2H6O c. C2H4O d. C4H5O ..Question 10 State the meaning of this equation 2NaC2H3O2 + H2SO4 -> Na2SO4 + 2HC2H3O2 Choose one answer. a. Two molecules of sodium acetate react with one molecule of sulphuric acid, producing one molecule of sodium sulfate and two molecules of acetic acid. b. Two moles of sodium acetate react with one mole of sulphuric acid, producing one mole of sodium sulfate and two moles of acetic acid. c. Both a) and b) ..Question 11 Calculate the mass of 0.97 mole of water. (1 point) Choose one answer. a. 17.46 g b. 17.95 g c. 18.78 g d. 18.99 g ..Question 12 In the first step of silicon purification, a reaction is brought about between the impure silicon and chlorine. Pure silicon is then used, in the computer industry, for the manufacture of microchips. Si + Cl2 -> SiCl4(unbalanced equation) Given that the silicon is 92% pure, calculate the theoretical yield percentage if 1.0 t of impure silicon produces 2.33 t of silicon (IV) chloride. (5 points) Choose one answer. a. 29% b. 34% c. 42% d. 56% ..Question 13 Calculate the number of moles of sugar contained in a tablespoon (12 g) of sugar, C12H22O11. Choose one answer. a. 3.9 x 10-2 moles b. 3.5 x 10-2 moles c. 3.5 x 10-4 moles d. 5.6 x 10-3 moles ..Question 14 Volume is defined as: Choose one answer. a. amount of three-dimensional space occupied by a substance b. measure of the random motions (average kinetic energy) of the components of a substance c. force per unit area ..Question 15 For the reaction Zn + CuSO4 -> ZnSO4 + Cu (unbalanced equation) calculate what mass of each product is expected, assuming that the limiting reactant is completely consumed. (5 points) Choose one answer. a. 5.5 g ZnSO4 ; 2.7 g Cu b. 5.1 g ZnSO4 ; 2.0 g Cu c. 6.1 g ZnSO4 ; 4.2 g Cu d. 7.0 g ZnSO4 ; 3.7 g Cu ..Question 16 Calculate the volume occupied by 3.5 moles of gaseous methane at NTP conditions. (1 point) Choose one answer. a. 78 L b. 56 L c. 57 L d. 62 L ..Question 17 2KClO3 -> 2KCl + 3O2 2 mol 2 mol 3 mol Use the reaction above to determine the number of moles of O2 produced with 20 moles of the KCl produced Choose one answer. a. 24 mol b. 27 mol c. 30 mol d. 43 mol .

• Answer:

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