How many molecules are there in 2.80 kg of hydrazine, #N_2H_2#?

1 Answer
anor277
Feb 4, 2017

#"Hydrazine is"# #N_2H_4#

Explanation:

#"Moles of hydrazine"# #=# #"Mass of hydrazine"/"Molar mass of hydrazine"#

#=(2.8xx10^3*g)/(32.05*g*mol^-1)~=87*mol.#

And if there are #87*mol#, there are #87*molxxN_A#, where #N_A="the avocado number"=6.022xx10^23*mol^-1#,

And #87*molxxN_A=5.26xx10^25# individual hydrazine molecules.

#N_2H_2# is #"diazene"#, which can exist in two isomeric forms. Why?

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