2. How many moles of copper, Cu, are needed to react with sulfur, S, to produce 0.25 moles of copper(I) sulfide,
Cu S, according to the following reaction?
2 Cu + S Cus
Known:
Unknown:
How many moles of sodium, Na, are needed to react with sulfuric acid, H, SO,, to produce 3.75 moles of sodium

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false

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 !