What is the PH of a 0.10M solution of NH3, a weak base, whose Kb= 0.000018? A 2.89
B 11.11
C 9.24
D 4.76​

Which element in the third period would you expect to have the larger atomic radius, sodium (na) or sulfur (s)? a. sodium, because it has a higher effective nuclear charge attracting electrons in fewer energy levels. b. sodium, because it has fewer protons attracting electrons in the same energy levels. c. sulfur, because it has more protons attracting electrons in more energy levels. d. sulfur, because it has a higher effective nuclear charge attracting electrons in the same energy levels.

Write the complete balanced equation for the reaction between lead (iv) oxide (pbo2) and water (h2o).

Which of these conditions most likely produces an unstable isotope?