science/math help...find density if mass=188.08g and volume=23.808cm^3?

Question

find mass if density=0.96g/cm^3 and volume=126cm^3

find volume if density=2.65g/ml and mass=35.6

please explain

so i can figure out how to do this

web sites would be good also

Answer 1

Density = mass / volume = 188.08 / 23.808 = 7.899(approx.)

now, mass = density X volume = 0.96 X 126 = 120.96g

now, volume = mass / density = 35.6 / 2.65 = 13.433(approx.)

Answer 2

Density = Mass / Volume

The formula can also be used to find mass or volume given the density. Two values must be given in order to find the third. All you do is substitute the values and solve for x.
In this case:

0.96 g / cm^3 = x / 126 cm^3

Cross multiply 0.96g/cm^3 x 126 cm^3 to get the mass which is 120.96 (g/cm^3)/cm^3 or 120.96 grams (since the cm^3's cancel out).

Now for the second exercise:
2.65 g/ml = 35.6 / x

Here you cross multily to get:

2.65 g/ml (x) = 35.6

Divide both sides by 2.65 (to isolate and find the value of x) and you will get that the volume is approximately 13.43 ml.

To check your work you can divide the mass by the volume and you will get the given value for the density.

Hope this helps ;-)

Answer 3

I understand you want you to know if mass=188.08gm and volume=23.808 cm^3 then what it's density? & if density=0.96/cm^3 and volume=126cm^3 then what it's mass?

First of all, I would let you what's mass, volume and density and what's relationship between them then you can understand it very well.

Mass is definite characteristic of an object. It can't be changed without damaging the object.

But, when You put a mass in a specific vessel, depending on the vessel's volume, something changes. If the vessel is small, it will be unusually heavy. If it is large, it will be unusually light.

In both cases, the mass of the vessel is the same. But, the DENSITY changes, depending on the volume.

The density is related to the mass by the following equation:

D = m / V (it is usually represented with greek letter rho, not D, like here).

The unit for density is kg / m3.

Density can be changed easily, by varying the volume. For example, a bunch of wool is 1 kg of weight (it's mass is 1 kg).
If You press it, it will have very small volume, so it's density will be big. If You shake it around, it will have very large volume, so it's density will be very small. But it's mass is the same in all cases.

So, if You want to calculate the density of an object, weigh it, and then divide it's mass with it's volume, and You'll get it's density.

Now, I would let you what you asked.
You want to know
if mass-188.09 gm,
volume=23.808 cm^3
then density=?
/*Formula*/

Density = mass / volume
= 188.08 / 23.808
= 7.899 g/cm^3

-------------------------------------------------------------------------------

If density=0.96g/cm^3
volume=126cm^3
then mass=?
/*Formula*/
mass = density * volume
= 0.96 * 126
= 120.96g
-----------------------------------------------------------------------------
If density=2.65g/ml
mass=35.6
then volume=?
/*Formula*/
volume = mass / density
= 35.6 / 2.65
= 13.433 cm^3.


Hope it would your help.


Regards,
Pushpendra C.

Answer 4

density is mass over volume. So just divide the mass by the volume.

Mass is density times volume, so multiply the density by the volume.

Volume is mass divided by density.

Those are the three rules. If you want the actual answers, email me. But it's probably better to figure it out urself, using the stuff i just said. [psst...use a calculator, ;)]

Answer 5

Question #1

d=m\v

This is simply d=(188.08g)/(23.808cm^3).

Therefore, the density is 7.8997 g/cm^3.

Question #2

We will use d=m/v and rearrange it as m=dv.

The numbers are m = (0.96)(126)

Mass is 121 grams.

Question #3

We will use d=m\v and rearrange it to v=m/d.

Fill in the numbers it is v = 35.6/2.65.

The volume is 13.4 ml.

The trick to this problem is using the equation d=m\v. Practice rearranging this equation to get the desired quantity. I hope this helps and good luck! :)

Answer 6

23.808/188.08=0.126g/cm^3
126*0.96=120.96
35.6/2.65=13.43ml