50.0 mL of 1.00 M HCl and 50.0 mL of 1.00 M NaOH are combined in a coffee-cup calorimeter. Both solutions are initially at 24.4°C. The final temperature of the combined solution is 31.1°C. How much
heat is produced in the reaction?
A. 2.8kJ
B. 3.2kJ
C. 10.2kJ
D. 1.6kJ
E. 5.6kJ

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table?