How many joules are in 148 calories? (1cal= 4.18j)
35.4 j
6.61 j
148 j
619 j

At stp, what is the volume of 1 mole of co2?

What shape would a molecule with two bound groups and two lone pairs have?

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.