Question

_ and _ bond(s) in the H2C-CH2 molecule. 25) There are A) 3 and 2 B) 3 and 4 C) 4 and 3 D) 2 and 3 E) 5 and 1 is tetrahedral 26) The electron-domain geometry of A) CBr4 B) PH3 C) CCl2Br2 D) XeF4 E) all of the above except XeF4 27) GeF3H is formed from GeH4 and GeF4 in the combination reaction: GeH4 + 3GeF4 + 4GeF3H If the reaction yield is 92.6%, how many moles of GeFs are needed to produce 8.00 mol of GeFaH? A) 3.24 B) 5.56 C) 6.48 D) 2.78 E) 2.16 28) Molecular Orbital theory correctly predicts paramagnetism of oxygen gas. 02. This is because A) the bond order in O2 can be shown to be equal to 2. B) there are more electrons in the bonding orbitals than in the antibonding orbitals C) the energy of the n2p MOs is higher than that of the 2p MO D) there are two unpaired electrons in the MO electron configuration of O2 E) the O- bond distance is relatively short 29) The balanced reaction between aqueous potassium hydroxide and aqueous acetic acid is A) KOH (aq) + HC2H302 (aq) + OH (I) + HC2H302+ (aq) + K (s) B) KOH (aq) + HC2H302 (aq) - H20 (1) + KC2H302 (aq) C) KOH (aq) + HC2H302 (aq) + H2C2H303 (aq) + K (s) D) KOH (aq) + HC2H302 (aq) → KC2H303 (aq) + H2(g) E) KOH (aq) + HC2H302 (aq) - H2KC2H30 (aq) + O2(g) 30) A 255 mL round bottom flask is weighed and found to have a mass of 114.85 g. A few milliliters of an easily vaporized liquid are added to the flask and the flask is immersed in a boiling water bath. All of the liquid vaporizes at the boiling temperature of water, filling the flask with vapor. When all of the liquid has vaporized, the flask is removed from the bath, cooled, dried, and reweighed. The new mass of the flask and the condensed vapor is 115.23 g. Which of the following compounds could the liquid be? (Assume the ambient pressure is I atm.) A) C4H10 B) C3H70H C) C2H6 D) C2H5OH E) C4HOOH bottom flask is wd are added to boiling temperaturom the bath. Co Which of milliliters of an eas. All of the liqua has vaporized and the condenent pressure is 1 a with vapor weighed. The new me liquid be? (ASSU

Answer 1

Since it is not mentioned that which question has to be solved and according to my guidelines I'm solving the first two questions. Please don't dislike in that case.

25. 5 and 1

Since there are 5 single bonds in CH2=CH2 and all the single bonds are called sigma bonds and the extra double bond is called the pi bond and there is only one double bond. Therefore, it contains 5 sigma and 1 pi bonds.

Note. In double bond one bond is sigma and other is pi.

26. E. All except XeF4

Since all the molecule except XeF4 has a steric number 4 for which they follow tetrahedral geometry because their hybridization is sp³ XeF4 has a steric number 6 therefore it's hybridization would be sp³d² and will follow octahederal geometry.

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