Chemistry Stack Exchange
Chemistry Stack Exchange

Questions tagged [density]

For questions involving (theoretical or experimental) comparison of density of elements or substances, calculating density of solutions, effects of temperature on density, and other chemical aspects of density.

Density (volumetric mass density) is defined as the mass per unit volume of a substance. Questions about density on this site will usually involve (theoretical or experimental) comparison of density of different elements or substances, calculating density of solutions, affect of temperature on density, and other chemical aspects of density.

Though, the concept of density is much more popular in Physics. Hence, questions involving density alongside involve buoyant forces, pressure, and other mechanical physics concepts, are better suited for Physics.SE instead (and will be closed as off-topic on Chem.SE)

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What are these "certain chemical compounds" denser than osmium?

The Wikipedia entry for density states Osmium and iridium are the densest known elements at standard conditions for temperature and pressure but certain chemical compounds may be denser. I have not been able to turn up what these chemical…
Willk
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Separation of Liquids based on Density

I was doing some practice problems when I came across this one The answer key says the answer is B but I don't know why. Isn't the difference in the molar masses of the two substances in D greater than that in B? Or am I supposed to look for how…
Clangorous Chimera
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Density of moist air

Why does moist air have lesser density than dry air? When the amount of vapor inside increases, the mass increases and hence won't the density as well increase?
Karthik
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Why are chemistry droppers bad at holding bromine?

Question in my chemistry test last week. The question was related to a previous question on bromine's density.
Freddie Shere
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Specify the formula of the product X_n Y_m

During a chemical reaction, equal moles of two diatomic molecules $\ce{X}$ and $\ce{Y}$ are allowed to react to form one gaseous compound $\ce{X_nY_m}$. After the reaction is complete, it was observed that the density of the product formed is…
Melanie
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Electron Probability Density Functions

I am a mathematics and chemistry double major and I just finished my statistics requirement and a great deal of the class was spent on probability distributions (e.g. Binomial, Poisson, Geometric, Gamma, etc.) and so I was wondering since electrons…
djohnson
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Largest change in the water level

Which would produce the largest change in the $\ce{H2O}$ level when added to water in a $\pu{25 mL}$ graduated cylinder? (A) $\pu{10.0 g}$ of $\ce{Hg}$ $(d = \pu{13.6 g/mL})$ (B) $\pu{7.42 g}$ of $\ce{Al}$ $(d = \pu{2.70 g/mL})$ (C) $\pu{5.09 g}$…
Jaehyun Ahn
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When finding the liquid density which gives the most accurate results, a 25 ml Pycnometer or a graduated 10 ml cylinder?

Its 10 ml graduated cylinder with 25 ml of pycnometer, and we are measuring the density of the liquid(pure liquid) in each of the materials and we are suppose to compare the densities found , in terms of accuracy Excuse me guys am doing a a research…
Georgy
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What is the actual density of CAS 7647-14-5 (NaCl, 99+%)?

I'm not a chemist by profession, so please forgive any syntactical or vernacular oversights on my part. Basically, I'm getting mixed messages from different sites about the density of sodium chloride. Wikipedia and some other sites list the density…
No1Nos
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Gas densities and the atmosphere

The density of nitrogen is greater than the density of oxygen, hence the denser nitrogen would be present in the lower atmosphere. If so it would be deprived of oxygen as it would be pushed to the higher atmosphere due to its low density. But we…
sangeeth
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Conversion of grams to milliliters using kg/m3 density

Convert 100 grams of a solution to milliliters with a density of $\pu{681.9 kg/m3}$. It also has a density of $5.69$ pounds per gallon. Are any or all of these correct? \begin{align} \pu{100 g} \times \frac{\pu{1 mL}}{\pu{681.9 g//cm3}} &=…
user26967
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Determine Which has the higher density the pure liquids or solutions?

What i know that it immensely depends on their individual density, but am not really sure since doing research they was no solid answer. i just want a conformation if what am suggesting is correct.
Georgy
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Calculating mass from just density?

So I just started chem 101 and I'm not sure how to solve this problem. This is a problem from the dimensional analysis section of our book. It seems like the question wants me to get mass purely from density? The book never talked about that. It…
Haruku
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Is there any type of liquid, other than mercury, that PTFE teflon is known to "float" to the surface in?

The specific gravity of PTFE teflon is roughly 2.3. I have a 3/8" diameter sphere made up of entirely PTFE teflon, and I would like for it to float to the surface when dropped into a liquid. Does anyone know of a liquid, other than mercury, that…
Robert S
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Medicine and chemical density related

How are medicine densities calculated?For example what is the density of ascorbic acid 0f 250mg a pill?
makinggood
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