Chemistry Questions and Answers January 17, 2020

write the formula for an ionic compound formed from the K+ ion and and each of the following ions Cl-, N3-, S2-.

Question #2 The kinetics of the gas-phase reaction between nitrogen dioxide, NOz (A) and trichloroethene (B) have been investigated over the range 303-362 2 K. The reaction extent, with the reaction carried out ina constant-volume batch reactor, was determined from measurements of infrared absorption intensities, which were converted into

tmin 182.2 360.4 360.8 PskPa 3.97 5.55 3.99 P 7.16 7.66 6.89 PRkPa 0.053 0.147 0.107 435.3 2.13 6.77 0.067 332.8 3.97 3.03 0.04 120 2.49 8.57 0.027 182.1 2.08 9.26 0.04

If only one half of the flora in the world existed in 2100 (perhaps due to deforestation), what do you predict the atmospheric carbon level would be? How would you change the simulation to reflect this? What is the relationship between increased carbon in the ocean and increased carbon in the soil? How else might carbon be transferred to soil?

Medical insurance statuscovered (C) or not covered (N)is determined for each individual arriving for treatment at a hospitals emergency room. Consider the chance ex periment in which this determination is made for two randomly selected patients. The simple events are O 1 = (C, C), meaning that the first patient selected was covered and the second

Treatment of alkenes A and B with HBr gives the same alkyl halide C. Draw a mechanism for each reaction, including all reasonable resonance structures for any intermediate.

CHCHCH A HBr Br CHCHCH3 C HBr CHCHCH B

2- The resistance in a wire (circular cross-section) is given by the formula: R = p L/A Where R is the resistance in Ohms (), p is the resistivity of the material (constant for a material) in m, L is the length of the material, and A is the cross-sectional area of the material. Find the resistance and its uncertainty in copper wire with a length

1. Find the perimeter of a slot having the dimension given below: 2. What force (in tons) is required to punch the slot in questions 1 in material having an ultimate tensile strength of 60,000 PSI with a thickness of .25?? 3. What is the largest square hole that can be punched in .375? thick material with an ultimate tensile strength of 70,000 PSI

4.00 R 0.75