A gaseous reaction occurs at a constant pressure of 35.4 bar and releases 62.6 kJ of heat. Before the reaction, the volume of the system was 6.80 L . After the reaction, the volume of the system was 2.60 L . Calculate the total internal energy change, ΔU , in kilojoules. Recall, for this question, ΔU and ΔE are equal.

How many atoms of oxygen are contained in 160 grams of n2o3

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 formula can be used to calculate the molar mass of hydrogen peroxide