Pretend you are designing a jewelry box that stays closed through the use of magnets. Explain how you would have to set up the magnets in each of the two parts in order for it to be strong enough to stay closed unless pulled apart.

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

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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.