Question

Calculate the energy in kJ/mol of light with a wavelength of 360 nm.

9.17 * 10^-43 J/mol

Oxygen gas at 34.5 °C expands from 34.5 L to 45.7 L against a
constant pressure of 750 mmHg. What is the work done in
joules by the system?


1.13*10^3 J

Answer 1

for the first one I got 332 kJ/mol
E = hc/lamda
E = (6.626E-34)(2.998E8)/(360E-9)
E = 5.522 J
To convert it to kJ/mol, multiply by 6.022E23 and divide by 1000 to get 332 kJ/mol