A sample of N2O effuses from a container in 42 seconds. How liong will it take the same amopunt of gaseous I2 to effus from the same container under identical conditions?

Which metal exist in liquid state and can be cut with knife ?

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.

Find the number of moles of argon in 364g of argon.