Physical Chemistry Answers

2-Which of the following has a maximum wavelength? (A) Far infra-red frequency (B) Gamma rays (C)UV light (D) X-rays

Some hydrogen gas is collected over water at 20 ◦C. The levels of water inside and outside the gas-collection bottle are the same. The partial pressure of hydrogen is 509.4 torr. What is the barometric pressure at the time the gas is collected? Answer in units of torr. 

Helium gas is collected over water at 25◦C. What is the partial pressure of the helium, given a barometric pressure of 760 mm Hg? Answer in units of mm Hg. 

When calcium carbonate is heated ,it decomposes to produce quicklime and carbon dioxide

Calculate the volume of carbon dioxide produced at STP from the decomposition of 76g of CaCO3

An isotope of element 102, with a mass number of 253 was produced by bombarding ²⁴⁰₉₆Cm with a projectile, which was absorbed by the target nucleus. This projectile should be ___. 

The standard reaction enthalpy for the docomposition of CaCl₂.NH₃(s) into CaCl₂(s) and NH₃(g) is nearly constant at +78kJmol^-1 between 350 K and 470 K. The equilibrium pressure of NH₃ in the presence of CaCl₂.NH₃ is 1.71kPa at 400K. Find an expression for the temperature dependence of change in Gibbs free energy in the same range

consider a mixture of two gases A and B, confined to a closed vessel. A quantity of a third gas, C, is added to the same vessel at the same temperature. How does the addition of gas C affect the following: A. the partial pressure of gas A, B. the total pressure in the vessel?

write a balance chemical equation of the reaction

For argon the numerical value of a is 1.337 and the numerical

value of b is 0.0320.

Use the van der Waals equation to calculate the pressure of a

sample of argon at-90.0 °C with a molar volume of 2.59 L/mol.

Round your answer to the correct number of significant digits.

A metal tank contains three gasses: oxygen, helium, and nitrogen. If the partial pressures of

the three gasses in the tank are 40 atm of O2, 10 atm of N2, and 15 atm of He, what is the total