Density Problem - Please lookover my answer

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In summary, a 10.00 mL volume of unknown liquid with a mass of 8.839 g was added to a stoppered erlenmeyer flask with a mass of 48.217 g. The total mass of the unknown liquid plus the flask was 57.056 g. Using the formula D = m/v, the density of the unknown liquid is calculated to be 0.8839 g/ml. However, due to the given information having only 4 significant figures, the answer should be rounded to 0.88 g/ml.
  • #1
benworld
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Homework Statement



A 10.00 mL volume of unknown liquid was added to stoppered erlemeyer flask, which weighed 48.217 g. If weigh of the unknown liquid plus the stoppered flask was 57.056 g. Calculate density of unknown to correct number of signifigent figure.


Homework Equations



D = m /v


3. The Attempt at a Solution [/b

D = m / v

v = 10.00 ml

m = 57.056 - 48.217 = 8.839 g

d = 8.839 g / 10.00 ml = 0.8839 g/ml

Answer is 0.8839 g/ml

is this correct ? or should I round it to 0.884 g/ml ]
 
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  • #2
benworld said:

A 10.00 mL volume of unknown liquid was added to stoppered erlenmeyer flask, which weighed 48.217 g. If weigh of the unknown liquid plus the stoppered flask was 57.056 g. Calculate density of unknown to correct number of signifigent figure.

Seems correct, but what is that about a "signifigent figure"?
 
  • #3
I actually believe that it would be .88. With sig figs you round to the lowest amount of sig figs found in the given information. In this problem it would be the 10.00 mL, the 0 after the decimal are just place holders, insignificant.

Joe
 

Related to Density Problem - Please lookover my answer

What is density and how is it calculated?

Density is a measure of the amount of mass per unit volume of a substance. It is calculated by dividing the mass of an object by its volume.

What are the units of density?

The standard units of density are grams per cubic centimeter (g/cm3) in the metric system and pounds per cubic inch (lb/in3) in the imperial system.

What is the relationship between density and buoyancy?

Density plays a crucial role in determining whether an object will sink or float in a fluid. If the density of an object is greater than the density of the fluid, it will sink. If the density of an object is less than the density of the fluid, it will float.

How does the density of a substance change with temperature?

In most cases, the density of a substance decreases as the temperature increases. This is because the particles in a substance have more energy at higher temperatures and are therefore able to spread out more, resulting in a larger volume for the same amount of mass.

What are some real-world applications of density?

Density is used in various industries, such as construction, aviation, and food production. It is also important in understanding the properties of different materials and how they interact with each other. For example, the density of a material can affect its strength, buoyancy, and thermal conductivity.

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