Why do you think local traders refused to provide food to the Dakota on credit?

Which statements are there

Ihave no idea. about. that

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen

Answer collision and mountain formation;