How much heat must be added to a 8.21 g sample of gold to increase its temperature by 6.2oC ? The specific heat of gold is 0.13 J/goC

12. complete each of the following word equations for synthesis reactions. a. sodium + oxygen -> b. magnesium + fluorine -> 13. complete and balance the equations for the decomposition reactions. a. hgo -> [with the triangle heat symbol above the arrow] b. h2o(l) -> [with "electricity" written above the arrow]

  the mississippians were considered to be  horticulturalists, which means they were

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules