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  1. #1
    jkfnbm's Avatar
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    A fish tank holds 35 gallons of water. How many pounds (lb) of water are in the fish...

    ...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!

  2. #2
    Vegangrl's Avatar
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    Weight of 1 US Gallon of water = approx. 8.35 lb

  3. #3
    ash
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    1 gallon= 8.345 lbs. Do the math.

  4. #4
    imported_megami
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    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

  5. #5
    Vegangrl's Avatar
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    Weight of 1 US Gallon of water = approx. 8.35 lb

  6. #6
    imported_megami
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    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

  7. #7
    megami's Avatar
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    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

  8. #8
    megami's Avatar
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    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

  9. #9
    megami's Avatar
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    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

  10. #10
    Vegangrl's Avatar
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    Weight of 1 US Gallon of water = approx. 8.35 lb

 

 

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