How many grams of #N_2# are produced from the reaction of 8.96 g of #H_2O_2# and 6.68 g of #N_2H_4#?

Answer 1

Approx. #4*g#...

Hydrazine is OXIDIZED to dinitrogen gas...

#H_2N-NH_2 rarr N_2+4H^++ 4e^(-)# #(i)#
The nitrogens in hydrazine have a #-II# oxidation state...

Hydrogen peroxide is REDUCED to water...

#HO-OH+2H^+ +2e^(-)rarr 2H_2O # #(ii)#
Note that when we got element-element bonds, they are conceived to share the bonding electrons. The carbons in ethane have formal oxidation states of #C(-III)#... The oxygens in hydrogen peroxide have formal oxidation states of #O(-I)#...
And so we take #(i)+2xx(ii)# to retire the electrons....
#H_2N-NH_2 +2HO-OHrarr N_2+4H_2O#

And so now we assess the molar quantities of each reagent...

#"Moles of hydrogen peroxide"=(8.96*g)/(34.01*g*mol^-1)=0.264*mol#
#"Moles of hydrazine"=(6.68*g)/(32.05*g*mol^-1)=0.208*mol#

And thus hydrogen peroxide is the reagent in MOLAR deficiency (why they could not have added excess is beyond me!)….

We could get at most...#0.264*molxx1/2xx28.01*g*mol^-1=??*g#
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Answer 2

To find the amount of N2 produced, first, calculate the moles of H2O2 and N2H4 using their molar masses. Then, determine the limiting reactant. Once you have the limiting reactant, use the stoichiometry of the balanced chemical equation to find the moles of N2 produced. Finally, convert moles of N2 to grams using its molar mass.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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