9. calculate the standard enthalpy of the 3rd reaction using the given data: a, h° = +52.96 kj/mol afh= -483.64 kj/mol h2s)+i202 hi 2 h2g)+o2ig)2 h2o() 4 hig+o2lg)2 12)+2 h2o(e (1) (2) (3) a, h° =? 10. calculate the internal energy change for reaction (3) in the previous problem.

-586.56 kJ/mol is the standard enthalpy of the 3rd reaction.

Explanation:

...[1]

...[2]

..[3]

The unknown standard enthalpy of third reaction can be calculated by using Hess's law:

The law states that 'the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps'.

[2] - 2 × [1] = [3]

The standard enthalpy of the 3rd reaction is -586.56 kJ/mol.The negative sign indicates that energy is released during this reaction.

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

honesty and integrity.

inspire others.

commitment and passion.

good communicator.

decision-making capabilities.

accountability.

delegation and empowerment.

creativity and innovation.

here are the traits of a good leader.i'm not going to give you the examples so you can copy right it.that's illegal but i hope that this you out.