A coffee cup calorimeter initially contains 130g water at 22.7 Celsius. 12.4g of a Calcium Chloride, also at 22.7 Celsius, is added to the water and, after the CaCl2 dissolves, the final temperature is 38.0 Celsius. Calculate the enthalpy change for the dissolving of the salt in kJ/mol.

When the following equation is balanced using the smallest possible integers, what is the coefficent of oxygen gas? c7h16o(g) + o2(g) → co2(g) + h2o(g) -1 -5 -8 -16 -21

This flow chart shows the amount of energy that is emitted by each type of light. ultraviolet > blue light > yellow light > red light (maximum energy) (minimum energy) in an experiment, shining which type of light on a strip of metal would be least likely to produce the photoelectric effect? ultraviolet light dim blue light bright red light bright yellow light

Which polymers are most closely related? a. protein and nucleic acids b. cellulose and starch c. nucleic acids and starch d. nucleic acids and cellulose