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.

Abullet found at a crime scene may be used as evidence in a trial if the percentage of metals match to the composition of metals in a bullet from the suspect's ammunition. a forensic scientist's analysis of the bullet shows that it contains 11.9 g of lead, 0.5 g of tin, and 0.8 b of antimony. what is the percentage of lead metal in the bullet? express your answers to the one's place.

Which statement describes james chadwick’s discovery.

Table sugar completely dissolved in water is an example of a?