The lab was inflating a Ziploc bag with carbon dioxide from the chemical reaction of vinegar and baking soda. It was a bit stressful as I had to rely on my own accuracy of my procedure and measurments. Sadly, my measurements were off and my bag did not fully inflate.
http://www.moneysavingexpert.com/news/phones/2015/05/that-smile-might-cost-you-beware-being-hit-with-huge-emoji-fees |
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