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3) Element M is prepared industrially by a two-step procedure according to the following equations: (1) M20s (s)+ C(s)+ Cl2 (g)MCls()+ CO(g) 2) MCls (1)+ H2g)> M(s) + HCl(g) Assume that 0.696 g of M2Os is submitted to the reaction sequence. When the HCI produced in step (2) is dissolved in water and titrated with 0.600 M NaOH, 100.0 mL of the NaOH solution is required to neutralize the HCI. (a) Balance both equations (b) What is the atomic mass of element M, and what is its identity? (c) What mass of M in grams is produced in the reaction? 74) A mixture of CuO and Cu O with a mass of 10.50 g is reduced to give 8.66 g of pure Cu metal. What are the amounts in grams of CuO and CuO in the original mixture? 75) An unknown liquid is composed of 5.57% H, 28.01% of Cl, and 66.42% of C. The molecular mass found by mass spectrometry is 126.58 amu. What is the molecular formula of the compound? 76) When heated, lithium reacts with nitrogen to form lithium nitride: 6u(s) + N2(g)-â 21.10s) What is the theoretical yield of LiN in grams when 12.3 g of Li are heated with 33.6 g of N2? If the actual yield of LijN is 5.89 g, what is the percent yield of the reaction? 77 Disulfide dichloride (S2Cl2) is used in the vulcanization of rubber, a process that prevents the slippage of rubber molecules past one another when stretched. It is prepared by heating sulfur in an atmosphere of chlorine: What is the theoretical yield of S2Clz in grams when 4.06 g of Ss are heated with 6.24 g of Cl? If the actual yield of S2Cl2 is 6.55 g, what is the percent yield? 78) A compound X contains 63.3 percent manganese (Mn) and 36.7 percent O by mass. When X is heated, oxvgen gas is evolved and a new compound Y containing 72.0 percent Mn and 28.0 percent O is formed. (a) Determine the empirical formulas of X and Y. (b) Write a balanced equation for the conversion of X to Y 79) Give the oxidation number of the underlined atoms in the following molecules and ions: (a) CIF, (b) IF, (e) PF6 , (n) KAuCl4
3) Element M is prepared industrially by a two-step procedure according to the following equations: (1) M20s (s)+ C(s)+ Cl2 (g)MCls()+ CO(g) 2) MCls (1)+ H2g)> M(s) + HCl(g) Assume that 0.696 g of M2Os is submitted to the reaction sequence. When the HCI produced in step (2) is dissolved in water and titrated with 0.600 M NaOH, 100.0 mL of the NaOH solution is required to neutralize the HCI. (a) Balance both equations (b) What is the atomic mass of element M, and what is its identity? (c) What mass of M in grams is produced in the reaction? 74) A mixture of CuO and Cu O with a mass of 10.50 g is reduced to give 8.66 g of pure Cu metal. What are the amounts in grams of CuO and CuO in the original mixture? 75) An unknown liquid is composed of 5.57% H, 28.01% of Cl, and 66.42% of C. The molecular mass found by mass spectrometry is 126.58 amu. What is the molecular formula of the compound? 76) When heated, lithium reacts with nitrogen to form lithium nitride: 6u(s) + N2(g)-â 21.10s) What is the theoretical yield of LiN in grams when 12.3 g of Li are heated with 33.6 g of N2? If the actual yield of LijN is 5.89 g, what is the percent yield of the reaction? 77 Disulfide dichloride (S2Cl2) is used in the vulcanization of rubber, a process that prevents the slippage of rubber molecules past one another when stretched. It is prepared by heating sulfur in an atmosphere of chlorine: What is the theoretical yield of S2Clz in grams when 4.06 g of Ss are heated with 6.24 g of Cl? If the actual yield of S2Cl2 is 6.55 g, what is the percent yield? 78) A compound X contains 63.3 percent manganese (Mn) and 36.7 percent O by mass. When X is heated, oxvgen gas is evolved and a new compound Y containing 72.0 percent Mn and 28.0 percent O is formed. (a) Determine the empirical formulas of X and Y. (b) Write a balanced equation for the conversion of X to Y 79) Give the oxidation number of the underlined atoms in the following molecules and ions: (a) CIF, (b) IF, (e) PF6 , (n) KAuCl4
Casey DurganLv2
30 Jan 2019