Rutherford’s experiment showed that some substances allowed alpha particles to pass through them frequently. he theorized this happened because the nuclei were .

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Building glycogen from glucose molecules is an example of

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.