Will fan and medal.
A piece of iron wire has a diameter of 0.485mm. If iron has a density of 7.86g/cc, how long(in meters) should you cute a piece of wire to obtain 0.0214 moles of iron?

Question

Will fan and medal.
A piece of iron wire has a diameter of 0.485mm. If iron has a density of 7.86g/cc, how long(in meters) should you cute a piece of wire to obtain 0.0214 moles of iron?

ramirocruzo · Answer

Sorry for short answer @Shaekitchen

anonymous · Answer

where does the 56 come from in step 1 ? @RamiroCruzo

ramirocruzo · Answer

Its the Gram Atomic Mass of Fe i.e. mass of 1 mole

anonymous · Answer

okay so then why did you put the (3.14)r^2h ? Where does that come from ? @RamiroCruzo

ramirocruzo · Answer

Its the formula of volume of cylinder.....All wires are cylinder.....Oppsy.....Just did wrong calculations.....Misplaced Dia instead of Radius

anonymous · Answer

so does that mean the answer is wrong ? @RamiroCruzo

ramirocruzo · Answer

$$0.0214mol=\frac{ Req. Mass }{ 56 }$$
$$Req. Mass=1.1984gm$$
$$Vol.×Density=Req.mass$$
$$\pi r ^{2} h \times 7.86gm =1.1984$$
$$h=82.52cm$$

ramirocruzo · Answer

:D Sorry..........