A125 ml sample of 1.33 m hcl and 225 ml of 0.625 m naoh, both initially at 24.4 c are allowed to react in a calorimeter. what is the final temperature in the calorimeter? (heat of rxn=-57.2 kj) (ans: 29.9 c)

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!

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.

On the periodic table, elements are arranged by which of the following. a. mass numbers. b. increasing atomic number. c. alphabetical order. or d. density