NEED HELP ASAP- 12 POINTS

Using the equation
MgCl2-> Mg + Cl2, determine the volume of chlorine gas produced at STP from 12.0 grams of magnesium chloride.

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

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.

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.