What are the bond angles in the following molecular model of PCI_3? A) less than

Question

What are the bond angles in the following molecular model of PCI_3? A) less than 109.5degree B) 109.5degree C) less than 120degree but greater than 109.5degree D) 120degree 21) A 2.000 kg sample of nitroglycerine, C_3H_5N_3O_9, explodes and releases gases with a temperature of 1985degreeC at 1.000 atm. What is the volume of gas produced? 4 C_3H_5N_3O_9(l) 12 CO_2(g) + 10 H_2O(g) + 6 N_2(g) + O_2(g) A) 7756 L B) 10410 L C) 1632 L D) 11830 L 22) Which of the following gases has the highest average speed at 400K? A) Ne B) PH_3 C) Kr D)O_2

Explanation / Answer

20.PCl3 molecule has a trigonal pyramidal geometry or shape. The PCl3 bond angle will be about 109 degrees since it has a trigonal pyramidal molecular geometry.

ans is. B

22. Assuming that they are all at the same temperature, then the substance with the lowest molar mass will have the highest average speed.

U = (3RT / M)^(1/2)

ans is. A

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