please help because i have trouble on this since the beginning.
2006-09-12 09:45:17 · 7 answers · asked by jkidd 1 in Education & Reference ➔ Homework Help
there is a reason you are assigned homework, to check whether you understand the concepts assigned in class, get tutoring or listen better when the material is taught
2006-09-12 09:47:26 · answer #1 · answered by Anonymous · 1⤊ 0⤋
You wrote that this is a 50.0 cm bottle. Did you mean a 50.0 cm^3 bottle?
density is defined as a weight per unit volume, g/cm^3 or g/mL.
So the calculation would be 163g divided by 50.0 cm^3. The answer is 3.26 g/cm^3.
You have 3 significant digits in each number so the answer should have 3 significant digits.
2006-09-12 16:50:36 · answer #2 · answered by Ren Hoek 5 · 0⤊ 0⤋
I'm thinking maybe you wrote it down wrong or there was a typo? To calculate the density, you have to divide the mass by the volume. You have the mass, 163 g, but "a 50.0 cm bottle" doesn't tell you the volume. If you meant to type "50 cm^3" (cubic centimeters), then the volume would be 3.26 g/cubic centimeter = 3.26 g/mL (a milliliter is equivalent to a cubic centimeter).
2006-09-12 16:51:20 · answer #3 · answered by Amy F 5 · 0⤊ 0⤋
If you mean 50cc (cubic centimetres), then that is one-twentieth of a litre. So 163x20 = 3260g per litre, so the density per gram is 3260 divided by 1000 (number of cc's per litre) which gives 3.26 g/cc. In other words, it is 3.26times the density of water, as 1 cc of water weighs 1 gram -- by definition.
Dividing 163 by 50 will give you the same answer if you want to do it that way.
It's all just simple arithmetic one you earn the values of the basic units.
Lenky
2006-09-12 16:55:22 · answer #4 · answered by Lenky 4 · 0⤊ 0⤋
Density is a measure of mass per unit of volume. The average density of an object equals its total mass divided by its total volume. The SI unit of density is the kilogram per cubic metre (kg/m3)
2006-09-12 16:54:30 · answer #5 · answered by silligrl357 4 · 0⤊ 0⤋
50cm bottle? What the hell is that? Density is mass per volume. Stop sleeping in class.
2006-09-12 16:48:05 · answer #6 · answered by Wiley 5 · 0⤊ 0⤋
look at the formul in your text book it gotta be there...first make sure that the formula uses cm & g..or other wise ou'll have to convert..
it hs been long time for me since I last solved these things, butI remember it's easy..
2006-09-12 16:53:16 · answer #7 · answered by P.Y.T. 3 · 0⤊ 0⤋