anwer to # 21 only please! 15. Wha at volume of hydrogen (at STP) is produced by
ID: 694537 • Letter: A
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anwer to # 21 only please!
15. Wha at volume of hydrogen (at STP) is produced by dissolving one-half mole of aluminum in sulfuric acid? 2Al(s) + 3H,SOdaq) Al2(SO4)3(aq) + 3Holg) a 14.9 L 16.8 L c. 224 L d. 29.9L e 67.2 L 16. The rate of diffusion for N, (MW 28) is 1 84 times greater that of an unknown gas. Find the molecular weight of the gas. 0 a. 8.3 (b 94.8 c. 51.5 d. 15.2 c. none 17. What volume of Ni is required to produce 18.3 L of NH, at STP 3H2 (g) + N2 (g)- 2 NI 1, (g) a. 27.5 L b 18.3L c9.15L d. 224L c. 12.2L 18. Which of the following interactions are the strongest? a, hydrogen bonding force b ion-ion interactions permanent dipole force d. dispersion force c. London force For which of the following would dispersion forces be the most important factor in determining physical properties in the liquid state? a. H:O b. NaCl 19. HF c. NH CI 20. Which response includes all of the following compounds that exhibit hydrogen bonding and no other compounds? CH, AH, CH,NH. H Te, HF C CH, AsH,, H2Te d. AsHs, CHNH e. HE. HTe Which lquid would have the lowest viscosity at room temperature? 2 CHi4 c. CoHi d. CH12 e. CHNH 22. Capillary action is resistance to flow. the rate of collisions for gas molecules a. b.Explanation / Answer
21)
viscosity will be lowest where intermolecular force is weakest
in a, intermolecular force is hydrogen bonding which is very strong
in e, intermolecular force is hydrogen bonding which is very strong
in b,c and d, intermolecular force is London disersion force
This is weak force
This force will be weakest for molecule having smaller molar mass
This is true for d
Hence d is the answer
Answer: d
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