A piece of an unknown metal is placed in a coffee cup calorimeter as shown below in order to determine its specific heat. Data was collected and is shown in the table below. Sketch a graph of temperature vs. time for both the metal and the water.
Label on your graph the point at which thermal equilibrium has been established.
Use the information in the data table to calculate the specific heat of the metal.

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.