Question

what is the change in enthalpy for the reaction of 2.00 mol of iron (ii) oxide

Answer 1

By now, i believe you already know what's this formula stands for delta H=kJ/mol

Answer 2

or you can do this formula too
mole=mass/molecular mass

Answer 3

Iron(III) oxide or ferric oxide is the inorganic compound with the formula Fe2O3

Answer 4

Thanks for your reply I also want ot know
what is the energy of one mole of photons with a wavelength of 285 nm

Answer 5

Use the energy of a single photon

Answer 6

E = hv
v = c / λ

Answer 7

h = 6.626e-34 J s
v = 3x10^8 m/s for electromagnetic waves
sorry lol, here is what H and V stands for

Answer 8

E = Energy of a wave
h =Planck;s constant
v = Velocity of the wave

Answer 9

So far so good?

Answer 10

your must be

Answer 11

not for me lol, i meant for u

Answer 12

are you ok with everything? What part u don't get?

Answer 13

@hajeralam, u there?

Answer 14

One mole of a substance contains 6.02 x 1023 protons

Answer 15

First, do the frequency (f = c/λ) so you can calculate the energy of a single photon (E = hf)

Answer 16

We know the speed of light is (2.998x10^8 m/s)
the wavelength (2.85x102)

Answer 17

f = c/λ = (2.998x10^8 m/s) / (2.85x10^2 m) = solve :)

Answer 18

the wavelength (2.85x10^2)

Answer 19

thanks so much
ur a lifesaver

Answer 20

ur welcome ^_^