Which of the following equations are endothermic
H2 + F2 ⮕2HF

2HBr ⮕ H2 ⮕Br2

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

List the path of the respiratory system

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