HELP 1 Density-volume question?

  • Thread starter SAT2400
  • Start date
In summary, the conversation is about a density-volume question where an unknown liquid has a mass and volume at a certain temperature and the task is to identify the likely substance. The formula for density is given and the answer for the first part is acetone. In the second part, the question is about the new volume of water with a given density at the same temperature. The correct answer is not 25.19ml and the person is reminded to slow down and solve for volume using the given information.
  • #1
SAT2400
69
0
HELP! 1 Density-volume question!??URGENT!

Homework Statement


1.An unknown liquid has a mass of 26.366g and volume of 25.24 x10^-3 liters at 25'C.
Identify the likely substance from the following information.

Substance tricholorobenzene (density:1.454g/mL)
acetone (density: 1.049g/mL)
chloride( denisty: .8862g/mL)

2. If the substance had been water with a density of .9982g/mL at 25'C, what would be its new volume?

Homework Equations



g/mL

The Attempt at a Solution


1.26.366g/(25.24ml) => acetone
2. i have no idea...g/mL density .9982g/mL

Please HELP!
 
Physics news on Phys.org
  • #2


What is density definition?
 
  • #3


g/mL =density =mass/volume? intensive physical property!
please help!
 
  • #4


Right.

[tex]d = \frac m V[/tex]

You are given mass, you are given density - solve for V.
 
Last edited by a moderator:
  • #5


is the answer for 1 acetone?
is the answer for 2 25.19ml?

I know the formula already;;;;g/ML
 
  • #6


SAT2400 said:
is the answer for 1 acetone?
is the answer for 2 25.19ml?

1 - yes, 2 - no.

I know the formula already;;;;g/ML

That's not the formula. That's - at best - density unit.

Slow down. Solve for V. Write it using symbols that I have used earlier.
 
Last edited by a moderator:

FAQ: HELP 1 Density-volume question?

1. What is density and how is it calculated?

Density is a measure of the mass of a substance per unit volume. It is calculated by dividing the mass of the substance by its volume. The units for density are typically grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).

2. How do you find the volume of an object?

The volume of an object can be found by measuring its dimensions (length, width, and height) and using the formula V = l x w x h. Alternatively, the volume of irregularly shaped objects can be determined by measuring the displacement of water when the object is submerged in a graduated cylinder.

3. What is the relationship between density and volume?

Density and volume are inversely proportional. This means that as the volume of a substance increases, its density decreases, and vice versa. This relationship is described by the formula D = m/V, where D is density, m is mass, and V is volume.

4. How does temperature affect the density of a substance?

As temperature increases, the density of most substances decreases. This is because as temperature increases, the particles of a substance have more kinetic energy and therefore take up more space, resulting in a lower density. However, this is not always the case and some substances may have an increase in density with an increase in temperature.

5. Can the density of a substance change?

Yes, the density of a substance can change depending on factors such as temperature, pressure, and state (solid, liquid, gas). For example, water has a higher density as a liquid than as a solid (ice), and the density of air decreases as altitude increases due to the decrease in pressure.

Back
Top