In a coffee-cup calorimeter, 1.599 NH, NO, is mixed with 75.9 water at an initial temperature of 25.30°C. After dissolution of the salt, the final temperature of the calorimeter contents is 23.18°C. Assuming the solution has a heat capacity of 4.18 3/°C-9 and
assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of
NH, NO, in units of k]/mol.
AH-315 X kj/mol
T.

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

Why are people not able to scuba dive in the deep part of the ocean

1) describe the physical layout of the ocean floor ? 2) explain how the dumbo octopus swims differently than other octopus species and why this would be an advantage in the aphonic zone . 3) why are the types of organisms that live at each underwater hot vent so dramatically different ?