The above reaction was used to fuel the rockets in the Apollo mission landing module.

A) Is this reaction endothermic or exothermic?

B) How many grams of N2H4 must be reacted with an excess of N2O4 to produce 775 kJ of energy?

C) How many kJ of energy are produced when 6.25 g of N2O4 reacts with an excess of N2H4?

Achemistry student weighs out of phosphoric acid , a triprotic acid, into a volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with solution. calculate the volume of solution the student will need to add to reach the final equivalence point. round your answer to significant digits.

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?