The work function of sodium is 2.75 eV. Calculate the threshold wavelength of light at which emission of photoelectrons will first be observed

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

How does climate change cause the ocean's thermohaline current to slow down?