A fish tank holds 35 gallons of water. How many pounds (lb) of water are in the fish...

J

jkfnbm

New member
...tank.? How do you do this problems in terms of chemistry class? It's part of a density unit.
Maybe I wasn't clear. Think of CHEMISTRY class in HIGH SCHOOL. What is the format to answer the question. Besides, the actual conversion amount is 8.32 and the answer to the question is 292. Already know that. I want to know the process. Please, if you're an idiot or an asshole don't bother.
yes i did already round it due to sigfigs, i forgot to change back to post it here. but thank you unorthodox for your answer!
 
the first thing you need is the density of water, which is 1 g/ml or 1g/cm^3. so from here you convert the gallons of water into milliliters:
1gal=3.7854L=3785.4mL. So 35gal x 3785.4ml/1gal =132489mL
and remember density is D=M/V, or in this case you can manipulate it to be M=DV (where M is mass, V is volume, and D is density) if D=1g/ml , and V=132489ml you multiply them together to get M. the mL will cancel out. so 1g/mL x132489mL = 132489g.

now convert the grams to pounds: 1Lb = 453.59g. so set it up as 132489g x (1Lb/453.59g). meaning divide the amount you have by 453.59. so 132489g x (1Lb/453.59g)= 292.0897727Lb

now if you are worrying about sig figs you will round it to 290Lb or 2.9x10^2Lb. hope this helps :)


or you could do it like the ppl above me said lol
 
the first thing you need is the density of water, which is 1 g/ml or 1g/cm^3. so from here you convert the gallons of water into milliliters:
1gal=3.7854L=3785.4mL. So 35gal x 3785.4ml/1gal =132489mL
and remember density is D=M/V, or in this case you can manipulate it to be M=DV (where M is mass, V is volume, and D is density) if D=1g/ml , and V=132489ml you multiply them together to get M. the mL will cancel out. so 1g/mL x132489mL = 132489g.

now convert the grams to pounds: 1Lb = 453.59g. so set it up as 132489g x (1Lb/453.59g). meaning divide the amount you have by 453.59. so 132489g x (1Lb/453.59g)= 292.0897727Lb

now if you are worrying about sig figs you will round it to 290Lb or 2.9x10^2Lb. hope this helps :)


or you could do it like the ppl above me said lol
 
the first thing you need is the density of water, which is 1 g/ml or 1g/cm^3. so from here you convert the gallons of water into milliliters:
1gal=3.7854L=3785.4mL. So 35gal x 3785.4ml/1gal =132489mL
and remember density is D=M/V, or in this case you can manipulate it to be M=DV (where M is mass, V is volume, and D is density) if D=1g/ml , and V=132489ml you multiply them together to get M. the mL will cancel out. so 1g/mL x132489mL = 132489g.

now convert the grams to pounds: 1Lb = 453.59g. so set it up as 132489g x (1Lb/453.59g). meaning divide the amount you have by 453.59. so 132489g x (1Lb/453.59g)= 292.0897727Lb

now if you are worrying about sig figs you will round it to 290Lb or 2.9x10^2Lb. hope this helps :)


or you could do it like the ppl above me said lol
 
the first thing you need is the density of water, which is 1 g/ml or 1g/cm^3. so from here you convert the gallons of water into milliliters:
1gal=3.7854L=3785.4mL. So 35gal x 3785.4ml/1gal =132489mL
and remember density is D=M/V, or in this case you can manipulate it to be M=DV (where M is mass, V is volume, and D is density) if D=1g/ml , and V=132489ml you multiply them together to get M. the mL will cancel out. so 1g/mL x132489mL = 132489g.

now convert the grams to pounds: 1Lb = 453.59g. so set it up as 132489g x (1Lb/453.59g). meaning divide the amount you have by 453.59. so 132489g x (1Lb/453.59g)= 292.0897727Lb

now if you are worrying about sig figs you will round it to 290Lb or 2.9x10^2Lb. hope this helps :)


or you could do it like the ppl above me said lol
 
the first thing you need is the density of water, which is 1 g/ml or 1g/cm^3. so from here you convert the gallons of water into milliliters:
1gal=3.7854L=3785.4mL. So 35gal x 3785.4ml/1gal =132489mL
and remember density is D=M/V, or in this case you can manipulate it to be M=DV (where M is mass, V is volume, and D is density) if D=1g/ml , and V=132489ml you multiply them together to get M. the mL will cancel out. so 1g/mL x132489mL = 132489g.

now convert the grams to pounds: 1Lb = 453.59g. so set it up as 132489g x (1Lb/453.59g). meaning divide the amount you have by 453.59. so 132489g x (1Lb/453.59g)= 292.0897727Lb

now if you are worrying about sig figs you will round it to 290Lb or 2.9x10^2Lb. hope this helps :)


or you could do it like the ppl above me said lol
 
the first thing you need is the density of water, which is 1 g/ml or 1g/cm^3. so from here you convert the gallons of water into milliliters:
1gal=3.7854L=3785.4mL. So 35gal x 3785.4ml/1gal =132489mL
and remember density is D=M/V, or in this case you can manipulate it to be M=DV (where M is mass, V is volume, and D is density) if D=1g/ml , and V=132489ml you multiply them together to get M. the mL will cancel out. so 1g/mL x132489mL = 132489g.

now convert the grams to pounds: 1Lb = 453.59g. so set it up as 132489g x (1Lb/453.59g). meaning divide the amount you have by 453.59. so 132489g x (1Lb/453.59g)= 292.0897727Lb

now if you are worrying about sig figs you will round it to 290Lb or 2.9x10^2Lb. hope this helps :)


or you could do it like the ppl above me said lol
 
lol, the one thing the Europeans have on us, a measurement system where it all works out.
But seriously google the weight per pound and multiply..sigh

Btw 35 by 8.32 is 291.2, check your rounding lol

but in all seriousness and helpfulness, did you mean significant figures, where you would round to 290lbs?

Or did you mean the annoying GUESS process?
Givens, Unknowns, Equation, Substitute, Solve
G:35 gallons of water
U:weight in lbs
E:weight=(gallons)x(lbs per gallons)
S:weight=(35)x(8.32) [working off your numbers chief]
S:weight=291.2, which mysteriously rounds to 292, but for sig figs 290

and finally you would put [290lbs].......all niced and boxed of course
 
lol, the one thing the Europeans have on us, a measurement system where it all works out.
But seriously google the weight per pound and multiply..sigh

Btw 35 by 8.32 is 291.2, check your rounding lol

but in all seriousness and helpfulness, did you mean significant figures, where you would round to 290lbs?

Or did you mean the annoying GUESS process?
Givens, Unknowns, Equation, Substitute, Solve
G:35 gallons of water
U:weight in lbs
E:weight=(gallons)x(lbs per gallons)
S:weight=(35)x(8.32) [working off your numbers chief]
S:weight=291.2, which mysteriously rounds to 292, but for sig figs 290

and finally you would put [290lbs].......all niced and boxed of course
 
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