Inorganic Chemistry Answers

Use Molecular Orbital Theory to describe bonding in Be2,B2,C2 ,N2 and O2

why we add 3.3 gram when standard of hydrogen peroxide???

What happen when concentrate nitric acid react with red lead oxide(Pb3O4)?

0,5 mol of CO2 and 0,2 mol of H2 are put into a 5L vessel at a certain temperature. When the reaction CO2 (g) + H2 <-----> CO(g) + H2O(g), is reached equilibrium, the vessels contains 0,1 mol of CO. Calculate the equilibrium constant, Kc, for the reaction at given temperature.

Polychlorinated biphenyls (PCB) are environmental and health hazard. They break down very slowly in the environment. The decomposition of PCBs can be represented by the equation:

2 C12H4Cl6 + 23 O2 + 2 H2O --> 24 CO2 + 12 HCl

a) How many moles of water are needed to react 10.0 mol PCB?

b) How many grams of HCl are produced when 15.2 mol H2O react?


c) How many moles of CO2 are produced when 76.5g HCl are produced?


d) How many grams of PCB are reacted when 100.25g CO2 are produced?


e) How many grams of HCl are produced when 2.5kg of PCB react?

Silver tarnishes in the presence of hydrogen sulfide (which smells like rotten eggs) and oxygen because of the following reaction: Ag + H2S + O2 --> Ag2S + H2O .

a) How many grams of silver sulfide can be formed from a mixture of 1.1 g Ag, 0.14 g H2S, and 0.080 g O2?



b) How many more grams of hydrogen sulfide would be needed to completely react all the silver?

This element has a very simple structure and two liquid states each with different physical properties. What is this element?

Calcute the pH of a 0.0001 M KOH solution?