Question

The percent by mass of fluorine in PNF2 is %. (Enter your answer to four significant figures.)

Answer 1

Dear student,

P(phos Phones) Answer-la) meles PNFE Condains Imole F(flouine) 2males 1 mele N(niduog cu) and 2x199 389 mass 1noles P-tx 31 mass 318 1 mole mass IX 14 1 masl flouwune100 mass Total omass 3 8 38+31 14 38 83 45.80

Cu1s S(9 b) Cu is) + Cofpet =giv en mass in ? mo lan omast E 9/mol mole 22.44 mol 63.5 0.43 mol. ०५ । ১० (८ C4 -1 mole 0.43 mol mofay mass Poles Now, NO cu 어s mass 0 43 261 x(63.set 32) 91-29 41.29 3.5 32 O.43 3.5) 32 96.02 96.02 - 32 3.57 64.02 -7 63.5 Hewce Emperical foymula is Cus.

Cu(No3)2 Co) CuS) + 2 Ag ce) le 2 Ag No3 Cag) 10m the eaction it is clia that 2 moles Cu No3) 2 gine imele cu (No3)2 dine tmole moles RATNO3 0.419 moles ine ipieles 0.419 2 6.419 mot 2 O.2095 mo

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