ΔΗ, =-200 kg ΔΗ, =-300 kg
E + F
ΔΗ, = 800 kg
ΔΗρκα
A+ 2D
What is the overall enthalpy change DHrxn for the system?

Me i dont know what to do! 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 happens to the concentration of hydronium ions as the ph of a solution increases? a. hydronium ion concentration stays the same b. hydronium ion concentration decreases c. hydronium ion concentration increases

One student said that the investigation was not valid (a fair test). write a plan for the investigation that includes improvements to the method and apparatus