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ACS Gen Chem Final Exam with precise detailed answers

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ACS Gen Chem Final Exam with precise detailed answers

Institution
ACS Gen Chemistry
Course
ACS Gen chemistry









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Institution
ACS Gen chemistry
Course
ACS Gen chemistry

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Uploaded on
May 4, 2025
Number of pages
7
Written in
2024/2025
Type
Exam (elaborations)
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ACS Gen Chem Final Exam
with precise detailed answers

Which temperature on the phase diagram of a pure substance represents the normal boiling
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point of the substance? - correct answer(s) ✔✔ very corner
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Which property indicates weak intermolecular forces? - correct answer(s) ✔✔ low boiling
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point



Both containers shown below contain the same number of moles of an inert gas. The
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volume of container A is twice the volume of container B. Which statement best describes
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the relative pressure of the gas in the two containers?
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T= 300 K and T=150 K - correct answer(s) ✔✔ The pressure is the same in both containers
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because volume and temperature effects cancel. |||||| |||||| |||||| |||||| ||||||




Sodium chloride crystallizes in a face-centered cubic structure. How many nearest Cl-
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neighbor(s) does a Na+ ion have? - correct answer(s) ✔✔ |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




The common fertilizer, NH4NO3(s), can explosively decompose according to the reaction:
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2 NH4NO3(s) 2N2(g) + O2(g) + 4H2O(g)∆H = −236.15 kJ
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The enthalpy change when 80.06 g of NH4NO3(s) explodes is - correct answer(s) ✔✔
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Which is the largest mass? |||||| |||||| |||||| ||||||




1.0 mol He |||||| ||||||

, 1.00×106 atoms Ag |||||| ||||||




0.50 mol H2O
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10.0 g Ca - correct answer(s) ✔✔ 10.0 g Ca
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What is the maximum amount of Al2Cl6 that can be formed from the reaction of 4.0 mol of
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Al with 5.0 mol of Cl2 according to this equation?
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2Al(s) + 3Cl2(g) Al2Cl6(s) - correct answer(s) ✔✔
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What volume of 0.200 M HNO3 is needed to react completely with 5.80 g of Ca(OH)2?
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Molar mass / g·mol-1Ca(OH)274.1
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2HNO3 + Ca(OH)2 Ca(NO3)2 + 2H2O - correct answer(s) ✔✔ 783 mL
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Molar mass / g·mol-1C2H4O2-60|||||| |||||| ||||||




C4H6O3-102

C7H6O3-138

C9H8O4-180

Aspirin (C9H8O4) may be synthesized by mixing salicylic acid (C7H6O3) with excess acetic
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anhydride (C4H6O3). The balanced equation is |||||| |||||| |||||| |||||| ||||||




C7H6O3 + C4H6O3 C9H8O4 + C2H4O2 |||||| |||||| |||||| |||||| ||||||




When 2.0 g of salicylic acid is mixed with excess acetic anhydride, 1.7 g of aspirin is
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collected. What is the percent yield for this reaction? - correct answer(s) ✔✔ 65%
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Suppose an element X occurs naturally to the extent of 20.0% 12X and 80.0% 13X. The
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atomic mass of X is nearest - correct answer(s) ✔✔ 12.8
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Element X has four valence electrons, is a semiconductor, forms covalent bonds, and is
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capable of expanding its octet. Element X is most likely - correct answer(s) ✔✔ Si
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