Physical Chemistry Answers

Suppose that you wanted to synthesize a polyene that has its lowest excitation energy at a wavelength of 600 nm. What would the structure of molecule be, according to free electron molecular orbital theory?

When we trace the development of atomic theory, we can see how the early form of an idea is modified rather than thrown out by later discoveries. Do you recognize parallels to this modification of basic ideas in other kinds of human experience? Explain please.

Where does the light and heat energy come from when paper burns?

A compound includes only Phosphorous and Sulpur.There are 1.24 grams of Phosphorous in 2.20 grams of the compound.What is the molecular formula of the compound?
Please give me a detailed answer

Which gas is used in tyres of AEROPLANE???

What is the chemical equilibrium?

Blood receives an excess of carbon dioxide from matabolic activities, which slightly lowers blood pH, yet the blood remains relatively constant. Explain how CO2 is buffered in the blood causing stabilisation of blood pH.

Ionic bonds are considered to be strong chemical bonds, yet ions dissociate in water. Explain this apparent contradiction

(Chemistry) In a bimolecular reaction A + B → M, a moles per liter of a substance A and
b moles per liter of a substance B are combined. Under constant temperature the rate of
reaction is
y′= k(a − y)(b − y) (Law of mass action);
that is, y′ is proportional to the product of the concentration of the substances that are
reacting, where y(t) is the number of moles per liter which have reacted after time t. Solve
this ODE, assuming a and b not equal