Question

20. Which of the Tollowing are the co a. 1 and 2 e. 2, 3, and 4 b2 and 3nd.13 21. Which of the following is the correct mass a. 2.055% H, 32.69% , and 6125%O b. 1.028% H, 32.69% S, and 66.28% O c. 28.57% 14.29% S, and 57.17%O d. 1.028% H, 33.72% S, and 65.25% O e, 2.0 16% H, 32.07% s, and 65.91%O 22. If 50.0 g of benzene (CH) absorbs 2.71 J of energy in the form of heat t 25,0 "C, what is the feal weagenrre of benzene? The specific heat capacity of benzene is 1.72 31g 0 K. a. 25.0 °C b. 31.5 C .56.5 °C .32.3 c e. 57.3 °C 23. The mL sample of the wastewater is added concentration of sul fate in a sample of wastewater is to be determined by of equation given below. The solid lead sulfate is dried, and its mass is measure to be om2 the concentration of sulfate in the original wastewater sample? so42-(aq) + Pb(NO3)2(aq) → PbSO4(s) +2NOj"(aq) d.4379 M e-22M b. 2.2 M c. 41.79 M a, 0.02392 M three lone pairs of electrons and two single bonds. a. trigonal bipyramidal b. see-saw or distorted tetrahedron c. T-shaped d. linear 24. What is the electron-pair geometry around an atom in a molecule or ion which is surround e trigonal planar