The dissociation of calcium carbonate has an equilibrium constant of at 800. °C. a What is for the reaction? = Correct Recall that and are related by the equation: The equation: has . Note that . Applying the relationship: b If you place 28.5 g of in a 9.77-L container at 800. °C, what is the pressure of in the container? Pressure = atm Correct For the dissociation of calcium carbonate: c What percentage of the original 28.5-g sample of remains undecomposed at equilibrium? Percentage = %

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?