Chemistry Week#6 Avogadro‘s number and Thoughts on class discussions

 

Check out the Amadeo Avogadro Link and report back on your discoveries.


Here are some basics from this link

  • The number of particles in a mole is called Avogadro's number or, Avogadro constant. 
  • For most calculations, three (6.02 x 1023) or at most four (6.022 x 1023) significant figures for Avogadro's number are enough.
  • Anyone who has blown up a balloon should accept the notion that the volume of a gas is proportional to the number of particles in the gas.


Here are some basics from this link:

The number of particles in a mole is called Avogadro's number or, Avogadro's constant. 

For most calculations, three (6.02 x 1023) or at most four (6.022 x 1023) significant figures for Avogadro's number are enough.

Anyone who has blown up a balloon should accept the notion that the volume of a gas is proportional to the number of particles in the gas.


In addition, I find a few interesting facts about Avogadro's number online:

  • If there were a mole of rice grains, all the land area in the whole world would be covered with rice to a depth of about 75 meters.
  • One mole of rice grains is more grains than all the grain that has been grown since the beginning of time.
  • Computers can count at the rate of over 800 million counts per second. At this rate it would take a computer over 25 million years to count to 6.02 x 1023.
  • A mole of marshmallows would cover the United States to a depth of 600 miles .
  • In order to put a mole of rain drops in a 30 meter (about 100 feet) diameter tank, the sides of the tank would have to be 280 times the distance from the Earth to the Sun.
  • A mole of hockey pucks would be equal to the mass of the Moon.
  • Assuming that each human being has 60 trillion body cells (6.0 x 1013) and the Earth's population is 6 billion (6 x 109), the total number of living human body cells on the Earth at the present time is 3.6 x 1023 or a little over half of a mole.


Thoughts on one of this afternoon’s discussions.


The silica gel packets attract my attention. Not only does it have an interesting history, but it is also widely used in many areas. We see the silica gel packets in food, clothing, crafts, and medicine to keep the products dry. I am surprised that it has been used to collect dust from space and extract RNA and DNA because of its binding properties. It can be reused after the baking at 300 degrees for three hours. I'm not throwing them out!


Comments

  1. MichelleJune 13, 2021 at 1:29 PM

    Great compilation of facts about moles.
    Pretty psychedelic to imagine the US covered in marshmallows at a depth of 600 miles. Now they just need to come up with moles of graham crackers and chocolate so we can make an infinite supply of smores.

    ReplyDelete
  2. UnknownJune 13, 2021 at 7:36 PM

    That sounds like a great idea Michelle! These extra comparisons of how the mole works and translate is very helpful thank you!
    - Stephanie

    ReplyDelete

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