Calculate the change in energy of an atom that emits a photon of wavelength 2.21 meters. (planck's constant is 6.626 x 10-34 joule seconds, the speed of light is 2.998 x 108 m/s) a. 8.9886 x10-26 joules b. 4.8844 x 10-42 joules second c. 1.9864 x 10-25 joules d. 1.4643 x 10-33 joules /second

What type of solution is formed if 10 g of kclo3 are dissolved in 100g of water at 30

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.

What is the approximate vapor pressure when the gas condenses at 70 degrees celsius