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18 Nov 2019
The reaction of 0.779 g K with O_2 forms 1.417 g potassium superoxide, a substance used in self contained treating devices. Determine the formula for potassium superoxide. a. KO_2 b. KO c. K_2O_3 d. K_2O e. KO_4 The reaction of HCl with NaOH is represented by the equation HCl(q) + NaOH(aq) rightarrow NaCl(aq) + H_2O(l) What volume of 0.68 M HCl is required to titrate 27.2 mL of 0.539 M NaOH? a. 9.79 mL b. 1.49 mL c. 21.9 mL d. 27.2 ml e. 33.7 mL 2Al(s) + 6HCl(aq) rightarrow 2AlCl_3(aq) + 3H_2(g) According to the equation above, how many grams of aluminum are needed to completely react with 2.19 mol of hydrochloric acid? a. 177 g b. 26.6 g c. 19.7 g d. 2.19 g e. 59.1 g Consider the fermentation reaction of glucose: C_6H_12 O_6 rightarrow 2C_2 H_5OH + 2CO_2 A 1.00 mol sample of C_6H_12O_6 was placed in a vat with 100 g of yeast. If 37.0 g of C_2H_5OH was obtained, what was the percent yield of C_2H_5OH? a. 40.2 % b. 20.1 % c. 37.0 % d. 100% e. none of these Nitric oxide, NO, is made from the oxidation of NG_3 as follows: 4NH_3 + 5O_2 rightarrow 4NO + 6H_2O. If 9.6 g of NH_3 gives 12.0 g of NO, what is the percent yield of NO? a. 93% b. 44% c. 11% d. 71% e. 28%
The reaction of 0.779 g K with O_2 forms 1.417 g potassium superoxide, a substance used in self contained treating devices. Determine the formula for potassium superoxide. a. KO_2 b. KO c. K_2O_3 d. K_2O e. KO_4 The reaction of HCl with NaOH is represented by the equation HCl(q) + NaOH(aq) rightarrow NaCl(aq) + H_2O(l) What volume of 0.68 M HCl is required to titrate 27.2 mL of 0.539 M NaOH? a. 9.79 mL b. 1.49 mL c. 21.9 mL d. 27.2 ml e. 33.7 mL 2Al(s) + 6HCl(aq) rightarrow 2AlCl_3(aq) + 3H_2(g) According to the equation above, how many grams of aluminum are needed to completely react with 2.19 mol of hydrochloric acid? a. 177 g b. 26.6 g c. 19.7 g d. 2.19 g e. 59.1 g Consider the fermentation reaction of glucose: C_6H_12 O_6 rightarrow 2C_2 H_5OH + 2CO_2 A 1.00 mol sample of C_6H_12O_6 was placed in a vat with 100 g of yeast. If 37.0 g of C_2H_5OH was obtained, what was the percent yield of C_2H_5OH? a. 40.2 % b. 20.1 % c. 37.0 % d. 100% e. none of these Nitric oxide, NO, is made from the oxidation of NG_3 as follows: 4NH_3 + 5O_2 rightarrow 4NO + 6H_2O. If 9.6 g of NH_3 gives 12.0 g of NO, what is the percent yield of NO? a. 93% b. 44% c. 11% d. 71% e. 28%
Casey DurganLv2
30 May 2019