Other Chemistry Answers

Ionization energies tend to increase from left to right on the periodic table. There are two

exceptions to the rule in the graph below. Explain them using Quantum Theory

why do all polar bonds molecules have polar bonds and all non-polar molecules have non-polar bonds?

Discuss the principle of chemical oxygen demand and biological oxygen demand. Also differentiate between them.

A water sample contains following impurities in ppm

CaSO4 = 12 ppm, Ca(HCO3)2= 10 ppm, Mg(HCO3)2 = 8.5 ppm, MgSO4 = 14 ppmCalculate temporary hardness, permanent hardness and total hardness of water sample

Atomic and ionic radii of the elements of group 16 are smaller than those of the corresponding elements of group 15 and increases down the group. Why?

Consider the following equilibrium:

CH4 + H2O = CO + 3H2      Keq = 5.67 

An equilibrium mixture of this system was found to contain the following concentrations: 

[CH4] = 0.59 M, [H2O] = 0.63 M, [CO] = 0.25 M

What was the equilibrium [H2]?

1. Draw the structural formula of the following organic compounds:

1. 1-bromo-3-ethyl-3-methyl heptane
2. N, N dimethyl - 1 methyl propanamine

A certain ion X3+ contains 24 electrons and 32 neutrons .write down the mass number of this ion and identity the ion using its chemical symbol

What are the three functions of the calcium hydroxide, Ca(OH)₂, added in the Precipitation stage of the Extraction process? 

A solution containing 6.35 g nonelectrolyte dissolved in 500g of water freezes at -0.465°C. Determine the molecular weight of the solute.