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An alloy has Fe, Co , Mo in a composition of 71%, 12%, 17% respectively. How many cobalt atoms are there in a cylinder of radius 2.5 cm and length 10 cm .The density of the alloy is 8.2 g/ml.[At.wt Co=59]
 one year ago
 one year ago
An alloy has Fe, Co , Mo in a composition of 71%, 12%, 17% respectively. How many cobalt atoms are there in a cylinder of radius 2.5 cm and length 10 cm .The density of the alloy is 8.2 g/ml.[At.wt Co=59]
 one year ago
 one year ago

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shubhamsrgBest ResponseYou've already chosen the best response.3
mass= density * volume density is given volume = pi r^2 h fine mass 12% of mass is the final answer use appropriate units.
 one year ago

Nikhil619Best ResponseYou've already chosen the best response.0
oh.. we should take v of cylinder as volume?
 one year ago

Nikhil619Best ResponseYou've already chosen the best response.0
and they've asked number of cobalt atoms..how is that 12% of mass?
 one year ago

shubhamsrgBest ResponseYou've already chosen the best response.3
ahh okay 12% of that = mass of cobalt atoms in 1 mole of cobalt = avagadros no. atoms in given mass = ?
 one year ago

Nikhil619Best ResponseYou've already chosen the best response.0
12 % of that? what is that? no.of atoms? or no.of moles?
 one year ago

Peter14Best ResponseYou've already chosen the best response.1
looks like 12% by mass
 one year ago

shubhamsrgBest ResponseYou've already chosen the best response.3
12% of that , that'll give mass of cobalt in the compound
 one year ago

Peter14Best ResponseYou've already chosen the best response.1
"that" is the mass of the cylinder I think
 one year ago

shubhamsrgBest ResponseYou've already chosen the best response.3
that is mass of the compound in the given volume _
 one year ago

Nikhil619Best ResponseYou've already chosen the best response.0
ok so mass of the alloy..right?
 one year ago

Nikhil619Best ResponseYou've already chosen the best response.0
look..im sorry if u feel im dumb..but hw am i supposed 2 find mass of alloy?
 one year ago

shubhamsrgBest ResponseYou've already chosen the best response.3
mass = density * volume _
 one year ago

Nikhil619Best ResponseYou've already chosen the best response.0
Volume? again volume of cylinder?
 one year ago

Peter14Best ResponseYou've already chosen the best response.1
volume =pi*radius^2*height
 one year ago

Nikhil619Best ResponseYou've already chosen the best response.0
@ Peter14 I KNOW THAT...im askin if volume of alloy is same as volume of cylinder..
 one year ago

Peter14Best ResponseYou've already chosen the best response.1
yes, because the alloy is in the shape of the cylinder
 one year ago

shubhamsrgBest ResponseYou've already chosen the best response.3
the allow is in in the cylinder, so there volumes must be equated
 one year ago

Nikhil619Best ResponseYou've already chosen the best response.0
oh ok...k i got this..i have 2 more...can i post them now??
 one year ago

Peter14Best ResponseYou've already chosen the best response.1
sure shub, you take one, i'll take the other
 one year ago

Nikhil619Best ResponseYou've already chosen the best response.0
dont worry i can only post onebyone...
 one year ago

Peter14Best ResponseYou've already chosen the best response.1
start separate threads
 one year ago

Nikhil619Best ResponseYou've already chosen the best response.0
Onebyone is easier for me..one itself is hard to understand..2 means gone!
 one year ago
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