Agas effuses 1.55 times faster than propane (c3h8)at the
same
temperature and pressure.
what is the mass of the gas?

The p sub shell can hold up to 8 electrons in an atom. true or false?

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

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.