Question

I wanna ask that how can the following is true?

Answer 1

why is it true "the last equation"?

Answer 2

i mean "3 x a" shouldn't be equal to "1 x a".

Answer 3

@apoorvk Plz help:)

Answer 4

@Zarkon plz help:

Answer 5

Yeah, it seems like a typing error.
Should read actually:

"1 x 'Moles of Mg' in Mg3N2 = 3 x 'Moles of Mg' in Mg(OH)2"

since, 1x3 = 3 x 1

Answer 6

but this is not a typo. i have googled it.

Answer 7

the attachment is 100% correct:)

Answer 8

Yes I agree with @apoorvk, balance your equation and you will have \[1 mole sof Mg_3 N_2=3Moles Mg(OH)_2\]

Answer 9

What is the source of this attachment? And, what do you mean 'googled it'? reverse image search?

Answer 10

http://knowledgebin.org/kb/entry/Chemistry_Concepts_-_Mole_concept_Eudiometry_POAC_Limiting_Reagent_Chemical_Equivalence_and_Disproportionation_reaction_743.html

Answer 11

I can only say it's wrong, atleast in this world. -_-

Or may be, I am really ignorant regarding this.

Perhaps, @Limitless may help.

Answer 12

It would seem that Apoorvk is right. His argument hinges on:
\[\text{moles}(Mg_{j})=\text{moles}(jMg_{1})\]
He is also assuming:
\[\text{moles}(Mg_{j})=j\]
and
\[\text{moles}(jMg_{1})=j \cdot\text{moles}(Mg_{1})=j\]

If the \(\text{mole}(x)\) function behaves that way, he is right. I would think it does, but I can't vividly recall chemistry.

Answer 13

the picture is true.....

it says:
\( 3 \times\) the number of moles of \(Mg_3N_2\) used= \( 1 \times\) the number of moles of \(Mg(OH)_2\) produced

Answer 14

"3× the number of moles of Mg3N2 used= 1× the number of moles of Mg(OH)2 produced"
I don't really think this is^ correct either, @PaxPolaris

Answer 15

if you have 2 mol \(Mg_3N_2\) ..... and 6mol \(Mg(OH)_2\)
\[3 \times 2 =1 \times 6 \]

Answer 16

this is true because the number of moles Mg atoms on both sides has to be the same

there are 3 times as many Mg atoms as \(Mg_3N_2\) molecules on the left
................ 1 times as many Mg atoms as \(Mg(OH)_2\) molecules on the right

Answer 17

i think this only serves to give you Mg ratio where it is true that:
\[_{Mg(OH)2}^{Mg3N2} = _{1}^{3} \rightarrow Mg3N2 = 3 Mg(OH)2\]

Answer 18

@paxpolaris - what you are doing is just adjusting something to justify the statement. Make no sense to me. @maheshmeghwal9 - do think yourself about this.

Answer 19

ya I have got it. thanx to all for help:)
& one more thing @PaxPolaris is correct:)

Answer 20

aahh... now i get it. Hmm, though must admit the statements are very poor.

Answer 21

@maheshmeghwal9 i think @PaxPolaris is correct

Answer 22

ya but i wanna know
how can it be in the last statement 3 x3 =1 x1

Answer 23

Basically. . In POAC, we don't really balance any equation because we wan't the reactant side ka moles and the product side ma moles to be EQUAL! That's what all POAC is about. For eg in ca + o gives cao. Now in Ca has equal number of moles as in Ca in CaO. Basically, the reactant and prodduct side must have equal moles. So now by subsituiting their weight and molecular weight and atomic weight, or whatever, we can find the required thing

Answer 24

http://in.answers.yahoo.com/question/index?qid=20100512080359AAbrpB3

these may help u if u have doubts then inform me!

Answer 25

It's the no. of moles used vs the no. of moles produced actually. so that's correct

Answer 26

k! thanx:)

Answer 27

to both.