In which of the following classifications would a solution be placed?

Which is a pure substance? a) Element b) compound c) homogenous mixture d) heterogeneous mixture e) both a and b f) both c and d 

The figure  shows an adiabatic process from initial state i to final state f. Is the final temperature higher than, lower than, or equal to the initial temperature?   

The figure (not to scale) shows a pV diagram for [m] g of a gas with atomic weight of the gas is [w] g/mol. The gas undergoes the process 1 → 2 → 3. Find the value of V3 in liters (L).

[HL students only] Which of the following correctly illustrates the relationship between energy and wavelength?

How many sublevels are there in energy level n = 4?

[HL students only] How many naturally occurring isotopes are found for this element?  

[HL students only] The frequency of the convergence limit for the hydrogen atom is  3.18 × 1015 s−1. Calculate the ionisation energy for hydrogen in kJ mol−1   (Planck’s constant, h = 6.63 x 10-34)

What is the maximum number of electrons in energy level n = 2?

[HL students only] The figure below shows all the successive ionisation energies of an element. How many occupied energy levels does the atom contain?