Part 1: Does the diagram illustrate an endothermic or an exothermic reaction?
Part 2: Use the labels on the diagram to describe how you can determine the total change in enthalpy from the diagram. Would you expect the value to be negative or positive?

What’s the scientific notation for the number 6,840,000,000

How many moles of gas are present if p=11 atm, v=12l, t=185k?

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.