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complete the following fission reaction:
235 u + in-13. sn + ? + 2n + energy
express your answer as an isotope.
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Identify two types of chemical bonding in the source of dietary potassium

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.

Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ