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 06-24-2012 #1 (permalink) ggFTW Stalker   Join Date: Oct 2008 Posts: 1,080 iTrader: (0) Chemistry Help 1) The masses and volumes of two cylinders are measured. The mass of cylinder 1 is 1.35 times the mass of cylinder 2. The volume of cylinder 1 is 0.792 times the volume of cylinder 2. If the density of cylinder 1 is 2.00 g/cm^3, what is the density of cylinder 2? 2) A chemical manufacturer needs to store a large amount of baby oil (density = 0.960 g/mL in a cylindrical tank with radius 1.80 ft. Note: the volume of a cylinder is pi*r^2*h, where r is the radius and h is the height. How high (in feet) will the level of the oil be when the tank contains 3.50 ton of baby oil? 3) A patient has a blood count of 765 white corpuscles per cubic millimeter. How many white blood cells would be contained in 0.52 dL of the patient's blood? Last edited by evilxshadow; 06-24-2012 at 08:09 PM.
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 06-24-2012 #2 (permalink) and more came out Games   Join Date: Oct 2008 Location: On my toilet atm @_@ Posts: 899 Blog Entries: 6 iTrader: (0) IGN: BANNED! Density = Mass/Volume cylinder1_mass = 1.35 * cylinder2_mass cylinder1_vol = .792 * cylinder2_vol cylinder1_density = 2.00 g/cm^3 = (1.35 * cylinder2_mass)/(.792 * cylinder2_vol) cylinder1_density = (1.35/.792) * (cylinder2_mass/cylinder2_vol) So. Density of cylinder 1 is about 1.705 times more than density of cylinder 2. 2.00 g/cm^3 = (1.705) * (cylinder2_density) cylinder2_density = 2.00 g/cm^3 / (1.705) cylinder2_density = 1.17 g/cm^3 I HOPE THIS IS RIGHT. __________________
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Quote:
 Originally Posted by iFarted Density = Mass/Volume cylinder1_mass = 1.35 * cylinder2_mass cylinder1_vol = .792 * cylinder2_vol cylinder1_density = 2.00 g/cm^3 = (1.35 * cylinder2_mass)/(.792 * cylinder2_vol) cylinder1_density = (1.35/.792) * (cylinder2_mass/cylinder2_vol) So. Density of cylinder 1 is about 1.705 times more than density of cylinder 2. 2.00 g/cm^3 = (1.705) * (cylinder2_density) cylinder2_density = 2.00 g/cm^3 / (1.705) cylinder2_density = 1.17 g/cm^3 I HOPE THIS IS RIGHT.
yes it is thx, now i need help on a few more

 06-24-2012 #4 (permalink) and more came out Games   Join Date: Oct 2008 Location: On my toilet atm @_@ Posts: 899 Blog Entries: 6 iTrader: (0) IGN: BANNED! 2) 1 mL = 1 cm^3 1 ft = 30.48 cm radius =1.8*30.48 = 54.864 cm 1 ton = 1000000g (I THINK) baby oil mass = 3500000g .960=3500000g/(pi*54.864^2*h) h = 3500000/(3.14*54.864^2*.96) h=385.737825cm h=12.655ft 3) 765 white corpuscles per mm^3 1 liter = 10 dL = 1000000 mm^3 1 dL = 100000 mm^3 .52 dL = 52000 mm^3 52000 * 765 = 39870000 white corpuscles in .52 dL of patient’s blood I HOPE THESE ARE RIGHT __________________ Last edited by iFarted; 06-24-2012 at 11:13 PM. Reason: I'M AN IDIOT
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Quote:
 Originally Posted by iFarted 2) Density = Mass / Volume radius = 1.80 ft 1 foot = 3.048 decimeters according to google radius = 5.4864 dm liter = 1000 cm^3 = 1 dm^3 1 liter = 1000 milliliters 1 ton = 1000000 grams (I think) So baby oil has 3500000 grams .960 (g/mL) * (1000 mL/L) = 3500000 / (3.14 * 5.4864^2 * h) 960 g/L = 3500000 g /(3.14*5.4864^2 * h) dm^3 h = (3500000 g / (3.14*5.4864^2) dm^2) / 960 g/L h= 38.57 decimeters aka 12.65 feet 3) 765 white corpuscles per mm^3 1 liter = 10 dL = 1000000 mm^3 1 dL = 100000 mm^3 .52 dL = 52000 mm^3 52000 * 765 = 39870000 white corpuscles in .52 dL of patient’s blood I HOPE THESE ARE RIGHT
nope #2 is wrong, but #3 is right.
thx alot for help

Last edited by evilxshadow; 06-24-2012 at 09:21 PM.

 06-24-2012 #6 (permalink) and more came out Games   Join Date: Oct 2008 Location: On my toilet atm @_@ Posts: 899 Blog Entries: 6 iTrader: (0) IGN: BANNED! I'M SORRY FOR MY INCOMPETENCE. TRY 12.66 FEET. IF THAT DOESNT WORK. THEN. ASSUMING BY TON YOU MEAN SHORT TON WHICH IS 907184.74 g 1 mL = 1 cm^3 1 ft = 30.48 cm radius =1.8*30.48 = 54.864 cm 1 ton = 907184.74 g baby oil mass = 3175146.59 g .960=907184.74 g/(pi*54.864^2*h)cm^3 h = 907184.74/(3.14*54.864^2*.96) h=349.935469 cm h=11.48ft IF THAT FAILS THEN I AM SORRY OH MAH GAWD __________________

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