Qualification > Sciences

NO 1 IS GETTIN IT !!!!!!!!!!

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sweetie:
I ASKED MY TUTOR , AS WELL AS MANY OTHER PPL, BUT THEY'RE ALL GETTING DA ANS. TO Q2 OF THIS PAPER as  0.05 , SO IF ANY1 HAS GOT AN  XPLAINATION 4 WHY IS 0.03 THE CORRECT ANSWER PLZ POST IT !!!!

Amr Fouad:
you should ask nid..

shes the best in shemistry

Amr Fouad:
chemistry* lol

sweetie:
ya, i kno
nid plzzz help!!!!!!!!!!!!!

Phosu:
ok
so there is 15g of N in 100g of fertilizer, so 14g of fertilizer will contain how many g of N
 N           fertilizer
15            100
x                14     x= 2.1g

n=cv, we have the volume but to find the conc we need moles
so number of moles in 2.1g of nitrogen, n=2.1/14 = 0.15 moles

now u can use the formula
c=n/v  c=0.15/5 = 0.03 mol/dm3

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