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4. 22.4 L of compound A was measured at STP after a gaseous reaction, how many moles of A was in the sample? A. 0.1 mol C. 10 mol B. 0.01 mol D. 1.0 mol

4. 22.4 L of compound A was measured at STP after a gaseous reaction, how many moles of A was in the sample? A. 0.1 mol C. 10 mol B. 0.01 mol D. 1.0 mol

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Directions: Choose the letter that corresponds to the best answer. (For #1-3) Mr Wangxian installed a pneumatic piston near his door that is triggered to lock the door in case of an attack and placed 13.0 grams of NaN3 in the empty piston. It is powered by the reaction below: 2 NaN3 (s) → 2 Na (9) + 3 N2(g) 1. How many moles of NaN3 was available for the reaction? (Molar mass of NaN3 is 65 g/mol) A. 0.2 mol B. 0.3 mol C. 0.1 mol D. 0.4 mol 2. Assuming that all of the NaN3 reacted, how many moles of nitrogen gas was formed? A. 0.2 mol C. 0.1 mol B. 0.3 mol D. 0.4 mol 3. Assuming that all of the NaN3 reacted and the volume occupied by the solid sodium is negligible, what is the final volume of the piston? 7 A. 6.27 L C. 6.72 L B. 7.26 L D. 2.76 L 4. 22.4 L of compound A was measured at STP after a gaseous reaction, how many moles of A was in the sample? C. 10 mol D. 1.0 mol A. 0.1 mol B. 0.01 mol (For #5-7) Acetylene (C2H2) is formed by the reaction of water with calcium carbide, according to the following equation: CaC2 (9) + 2 H2O )→ Ca(OH)2 (aq) + C2H2 (g) Mr Xiyao was told to prepare 10 L (at STP) of acetylene in the laboratory. 5. How many moles of acetylene should Ms Xiyao produce? C. 0.464 mol A. 0.644 mol B. 0.446 mol D. 4.064 mol 6. How many moles of CaC2 is needed to produce 10 L of acetylene? A. 0.644 mol C. 0.464 mol B. 0.446 mol D. 4.064 mol 7. How many grams of CaC2 must Ms Xiyao prepare? (Molar mass of CaC2 is 64 g/mol) A. 68.2 g В. 62.8 g C. 28.6 g D. 26.8 g
Transcribed Image Text:Directions: Choose the letter that corresponds to the best answer. (For #1-3) Mr Wangxian installed a pneumatic piston near his door that is triggered to lock the door in case of an attack and placed 13.0 grams of NaN3 in the empty piston. It is powered by the reaction below: 2 NaN3 (s) → 2 Na (9) + 3 N2(g) 1. How many moles of NaN3 was available for the reaction? (Molar mass of NaN3 is 65 g/mol) A. 0.2 mol B. 0.3 mol C. 0.1 mol D. 0.4 mol 2. Assuming that all of the NaN3 reacted, how many moles of nitrogen gas was formed? A. 0.2 mol C. 0.1 mol B. 0.3 mol D. 0.4 mol 3. Assuming that all of the NaN3 reacted and the volume occupied by the solid sodium is negligible, what is the final volume of the piston? 7 A. 6.27 L C. 6.72 L B. 7.26 L D. 2.76 L 4. 22.4 L of compound A was measured at STP after a gaseous reaction, how many moles of A was in the sample? C. 10 mol D. 1.0 mol A. 0.1 mol B. 0.01 mol (For #5-7) Acetylene (C2H2) is formed by the reaction of water with calcium carbide, according to the following equation: CaC2 (9) + 2 H2O )→ Ca(OH)2 (aq) + C2H2 (g) Mr Xiyao was told to prepare 10 L (at STP) of acetylene in the laboratory. 5. How many moles of acetylene should Ms Xiyao produce? C. 0.464 mol A. 0.644 mol B. 0.446 mol D. 4.064 mol 6. How many moles of CaC2 is needed to produce 10 L of acetylene? A. 0.644 mol C. 0.464 mol B. 0.446 mol D. 4.064 mol 7. How many grams of CaC2 must Ms Xiyao prepare? (Molar mass of CaC2 is 64 g/mol) A. 68.2 g В. 62.8 g C. 28.6 g D. 26.8 g
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