Physical Chemistry Answers

A compound of phosphorus and chlorine is composed of 10.33gm of phosphorus for every 35.5 gm of chlorine.the simplest formula of the compound is
A) PCl. B) PCl3. C) PC. D) PCl4+

ibuprofen is made up of C, H, and O atoms. When a sample of ibuprofen, weighing 5g burns in oxygen, 13.86 g of CO2 and 3.926 g of H2O are obtained. What is the simplest formula of ibuprofen? Answer is C13H18O2 but I don't know how to get the answer

The temperature(T) of an ideal gas varies with it's volume (V) as T=-aV ^ 3+bV^2.where a and b are positive constant s.the maximum pressure of gas during this process is.

Electronic configuration of most electronegative element is
1. 1s2, 2s2, 2p4, 3s1
2. 1s2, 2s2, 2p6, 3s2, 3p5
3. 1s2, 2s2, 2p5
4. 1s2, 2s2, 2p6, 3s2, 3p6

The electronic configuration of the atom having maximum difference in first and second ionisation energies is
1. 1s2, 2s2, 2p6, 3s1
2. 1s2, 2s2, 2p6, 3s2
3. 1s2, 2s2, 2p1
4. 1s2, 2s2, 2p6, 3s1, 3p3

Express 23,000,000,000 in exponential form, using standard scientific or "e" notation (for example, 105 = 1.05e2). Enter the correct number of significant figures.

The plunger of a syringe is pulled out until the volume of air in the syringe is 30.0 mL at a pressure of 694 mm Hg. A stopper is then placed on the syringe so that no air can escape. What will bwe the air pressure inside the syringe if the plunger is depressed until the volume in the syringe is 26.0 mL?

what is the mass of oxygen molecule where molecular mass is 32?

Calculate the value of Delta H when the temperature of 1 mole of a monatomic gas is increased from 25 degree C to 300 degree C.

What is the concentration of [OH-] in the final solution prepared by mixing 20.0mL of 0.050 M HCl with 30.0 of 0.10M Ba(OH)2 ?
(1)0.10 M
(2)0.40M
(3).0050M
(4)0.12M