Select ALL of the following values that could be a reasonable magnitude for the density of a specimen of brass. HINT: How many grams of water are there in one cubic centimetre, and how many kilograms in one cubic metre ? (Click here for the Video Answer)

Select ALL of the following values that could be a reasonable magnitude for the length of a carbon-carbon bond. HINT: How big is an atom? (Click here for the Video Answer)

Select ALL of the following values that could be a reasonable magnitude for a wavelength in the mid infra-red radiation range used in spectrophotometric analysis. The mid IR range is approximately between 4000 cm^{-1} and 400 cm^{-1} (in wavenumbers). HINT: What is the range of visible light in nanometres? (Click here for the Video Answer)