Please help! What is the weight in pounds of 1.00 cubic foot of iron whose density is 7.86 g/mL?

What is the mass of 0.46 mol of mgcl2

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

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.