An unknown substance has a mass of 120 g and absorbs 9612 J of energy as its temperature increases from 25 degrees C to 115 degrees C. Using the table provided, what is the identity of this substance?

Which best describes why nh4+ can form an ionic bond with ci-?

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.