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18 Nov 2019
You will have 90 minutes to complete this exam. and report answers with correct units and number of significant figures for full credit. A periodic table is included on the last page of the exam. PV = nRT R = 0.08206L middot atm/mol middot K 1 atm = 760 mmHg 1 L middot atm = 101.3 J h = 6.626 times 10^-34 J middot s Hydrogen gas is produced by the reaction of Zn(s) with HCI(aq) according to the following balanced chemical equation. Zn(s) + 2HCI(aq) rightarrow ZnCI_2 (aq) + H_2 (g) If 0.105 g of zinc are reacted with an excess of hydrochloric acid at STP (0 degree C and 1.00 atm), what volume of hydrogen gas is produced, n liters? b. In a separate experiment, an unknown amount of line is reacted with excess HCI, and the gas produced is collected over water at a pressure of 755 mmHg. If a total volume of 52.0 mL of gas is collected, i) what is the partial pressure of the hydrogen gas. and ii) what was the mass of the original sample?
You will have 90 minutes to complete this exam. and report answers with correct units and number of significant figures for full credit. A periodic table is included on the last page of the exam. PV = nRT R = 0.08206L middot atm/mol middot K 1 atm = 760 mmHg 1 L middot atm = 101.3 J h = 6.626 times 10^-34 J middot s Hydrogen gas is produced by the reaction of Zn(s) with HCI(aq) according to the following balanced chemical equation. Zn(s) + 2HCI(aq) rightarrow ZnCI_2 (aq) + H_2 (g) If 0.105 g of zinc are reacted with an excess of hydrochloric acid at STP (0 degree C and 1.00 atm), what volume of hydrogen gas is produced, n liters? b. In a separate experiment, an unknown amount of line is reacted with excess HCI, and the gas produced is collected over water at a pressure of 755 mmHg. If a total volume of 52.0 mL of gas is collected, i) what is the partial pressure of the hydrogen gas. and ii) what was the mass of the original sample?
Hubert KochLv2
12 Nov 2019