In a coffee-cup calorimeter, 60.0 g of H2O and 40.0 mL of HCl are mixed. The HCl had an initial temperature of 49.5 oC and the water was originally at 24.0 oC. After the reaction, the temperature of both substances is 33.1 oC. Was the reaction exothermic or endothermic? Explain. Calculate how much heat the water lost or gained.

**40** points asapessay questions (10 points possible) clear image of next, create your own scenario. it can be one of your own real experiences or one you make up. use imagery in your writing to give your instructor a the setting and an action taking pace in your writing explain the structure and functions of the skin at work in your scenario. !

100 points answer quick the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

What is the binding energy of a nucleus that has a mass defect of 5.81*10-^29 kg a 5.23*10-^12 j b 3.15* 10^12 j c 1.57*10-3 j d 9.44*10^20 j