Physical Chemistry Answers

Why ideal solutions are behave like ideal gases? Provide solid reasons for comparision

Derived the relation between the molarity and normality of x gram of suphuric acid dissolved in 100ml of water

Question text
Cao+H2o → Ca(OH)2 it is _________________type of reaction


Select one:
Exothermic reaction
Displacement
Endothermic reaction
Double displacement

State Dalton’s law of partial pressure. Derive its mathematical form

It is believed that humans first arrived in the Western Hemisphere during the last Ice Age, presumably by traveling over an exposed land bridge between Siberia and Alaska. Archaeologists have estimated that this occurred about 11,000 yr ago, but some argue that recent discoveries in several sites in North and South America suggest a much earlier arrival. Analysis of a sample of charcoal from a fire in one such site gave a 14C decay rate of 0.4 dpm/g of carbon. What is the approximate age of the sample?
Ethyl chloride decomposes to ethylene and HCl in a first-order reaction that has a rate constant of 1.6 × 10−6 s−1 at 650°C.
a. What is the half-life for the reaction under these conditions?
b. If a flask that originally contains 0.077 M ethyl chloride is heated at 650°C, what is the concentration of ethyl chloride after 4 half-lives?

Consider a discrete fluid-solid mechanical system (for instance a wing profile with two degrees of freedom). Solutions of the form V⃗ eλt are looked for, V⃗ being a two components vector. On the figure below the real and imaginary parts of λ are plotted as function of the Cauchy number. Give an estimate of the critical value of the Cauchy number at which an instability occurs.

A 456 mL sample of argon gas is expanded at constant at constant pressure to 1.75 L at 55ºC. What was the original temperature of the gas in º C?

a.
-188 ºC

b.
188 º C

c.
200 F

d.
-200 F

Plot the rotational partition function of N2 as a function of temperature from 10 to 300 K. At what temperature (in K) does the approximation of qr=TΘr (Eq. 5.49) result in less than 1% error?

Mobility of H+ ions (in aques medium) is highest:
A).Of the small size of H+
B).Of highest hydration enthalpy of H+
C).It exhibits a grothus type of conduction
D).Hydrogen is a lightest element