We made this white powdery stuff react with hydrochloric acid in a lab on Tuesday that made water, salt, and carbon dioxide gas. We calculated how much carbon dioxide gas and salt we would theoretically have if three grams of sodium carbonate was added, using the grams to moles to moles to grams conversion ratio thingy. Afterwards, we added them together, and there were bubbles! Then we boiled all the water away (with dangerous matches) and we had some salt left. :O
Kinda like this.
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