In this exercise, you will calculate molar value of ΔH (in kJ/mol) for dissolving NH4H2PO4 in Part D of the Calorimetry lab. What temperature change did you find for dissolving NH4H2PO4 in Part D of the experiment? (Include the + or - sign in your answer.)

What is the typical rotational frequency frot for a molecule like n2 at room temperature (25∘c)? assume that d for this molecule is 1å=10−10m. take the total mass of an n2 molecule to be mn2=4.65×10−26kg. you will need to account for rotations around two axes (not just one) to find the correct frequency. express frot numerically in hertz, to three significant figures.