How many molecules of H2O in 100kg of snow? dont know where the density comes in

In summary, there are 3.346x10^27 molecules of H2O in 100kg of snow, without taking into account the density of snow. The density is given as 800 kg/m3 but is not necessary for solving this problem.
  • #1
boom baby
2
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How many molecules of H2O in 100kg of snow?? don't know where the density comes in!

Homework Statement



How many molecules of H2O are there in 100kg of snow? Density of snow is given as 800 kg/m3

Homework Equations



1 mole = 6.023x10^23 molecules
mass/molecular mass = number of moles


The Attempt at a Solution



This is my attempt, ignoring the density.

1 mole of H2O = 6.023x10^23 molecules of H2O

Hence 18g H2O contains 6x10^23 molecules
1g = 3.346x10^22 molecules
100,000g (100kg) = 3.346x10^27 molecules of H2O

Where/how does the density come into it?
 
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  • #2


Your solution is correct. You don't need the density to solve the problem, so it's there to confuse you.
 
  • #3


Excellent. Thanks man
 

FAQ: How many molecules of H2O in 100kg of snow? dont know where the density comes in

1. How do you calculate the number of molecules of H2O in 100kg of snow?

The number of molecules of H2O in 100kg of snow can be calculated by first finding the density of snow. This can be done by dividing the mass of snow (100kg) by its volume. Once the density is known, the number of moles of H2O in 100kg of snow can be found using Avogadro's number. Finally, the number of molecules can be calculated by multiplying the number of moles by Avogadro's number again.

2. What is the density of snow and how does it affect the number of molecules of H2O?

The density of snow can vary, but on average it is around 0.1 g/cm3. This means that for every cubic centimeter of snow, there is 0.1 grams of mass. The higher the density, the more molecules of H2O will be present in 100kg of snow.

3. Is the number of molecules of H2O in 100kg of snow constant?

No, the number of molecules of H2O in 100kg of snow can vary depending on factors such as temperature, air pressure, and humidity. These factors can affect the density of snow, which in turn affects the number of molecules present.

4. How can the number of molecules of H2O in 100kg of snow be measured in a lab?

In a lab setting, the number of molecules of H2O in 100kg of snow can be measured using various techniques such as spectroscopy or gas chromatography. These methods involve analyzing the snow sample and calculating the number of molecules present based on its mass and density.

5. Are there any other factors that can affect the number of molecules of H2O in 100kg of snow?

Yes, aside from the density of snow, other factors such as impurities or contaminants in the snow can also affect the number of molecules of H2O present. Additionally, the process of melting and refreezing snow can also change its density and thus the number of molecules of H2O in a given mass of snow.

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