PLEASE HELP!

The following 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?

Which of the following statements concerning the influence of culture on ethnic identity formation is accurate? a. one will reject ethnic identity if cultural stereotypes are encountered. b. if one’s ethnic city is different from the dominant cultural group, then one’s ethnic identity you will become weekend. c. if an the ethnic group is excepted by dominant culture, then ethnic identity formation can be a difficult process. d. similarity to the dominant culture can determine how easy it is for one to except ethnic differences.

The clouds are grey and ground is wet. a quantitative b qualitative

Compare and contrast physical changes with chemical changes.