Methylhydrazine (CH6N2) is commonly used as a liquid rocket fuel. The combustion reaction is below. When 4.00 g of methylhydrazine is combusted in a calorimeter, the temperature increases from 25.00 oC to 39.50 o C. The calorimeter constant is 7.794 J/oC and the specific heat of methylhydrazine is 2.93 J/g oC. What is the overall heat of the reaction (kJ/mol methylhydrazine)

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.

Need what is special about water as a compound? how does water regulate climate? what drives water evaporation?   why is the water vapor fresh water when it rises from the ocean? why might freshwater in the form of snow take longer to enter the water cycle again than liquid precipitation?   what is an aquifer? what role do people play in the water cycle? plz just answer as many as you can ! thx if you !