Sunday, November 8, 2015

Converting Mass, Moles, and Molecules

The other day in class, we learned how to convert between moles in a balanced chemical equation, mass in grams, representative particles (atoms, molecules, formula units, ions), and the volume of gasses at STP. We were given the "Mole Road Map" to help with this, which can be seen below:

Source for the above picture

This map gives you the proper equations to use when converting, and when to use each of them. Here are a couple examples of problems that you can use the Mole Road Map on:

- How many grams are in 5.9 moles of Na?
(5.9 moles Na) x (22.99g Na/ 1 mole Na) = 140g

-How many grams are in 2.13 x 10^25 atoms of Platinum?
(2.13 x 10^25 atoms Pt) x (1 mole Pt/ 6.02 x 10^23 atoms Pt) x (195.08g Pt/ 1 mole) = 6.90 x 10^3g Pt

Here is a helpful website that I found that goes more in-depth as to how to convert in problems like the ones above: Mole conversions

2 comments:

  1. Carly, thanks for sharing! I also found the mole road map very helpful when doing conversions. Also, I like how you added the two examples, they are very helpful in showing how to make use of the road map on problems.

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  2. Thank you for including examples. This really helps because seeing how it is done rather than just hearing it really helps to understand. The sources you included were helpful as well. Next time, maybe have the examples be handwritten so they are easier to follow. Other than that, this was great, thanks!

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