How many Joules of energy in 3565 calories?
Explain

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

Two solids are mixed in a flask and stirred. after a few minutes, the flask becomes cold. which of the following best describes this reaction? a. an exothermic reaction b. a combustion reaction c. an endothermic reaction d. a decomposition reaction