| Recent Answers from Chad Welch |
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2008-11-10 water and evaporation: Tyler, That is a good question. To begin to understand it, we need to think about the water on a molecular level. When it is solid (ice) the molecules are tightly bound to each other. When it is liquid...
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2008-09-16 moles: Naomi, You are almost correct. You do need to find the molar mass. The units of the molar mass are g/mol. So to find the number of moles divide the weight of the compound by it's molar mass. For example...
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2008-09-15 Planet chemical used in medicine?: Abigail, Thanks for the question. Yes there are numerous medicines in use that are derived from plants. One of the oldest manufactured medicines still used today is Aspirin. That was originally extracted...
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2008-08-19 Titration: Jessica, This is a good question. You have it set up correctly, except that I think a plus sign is missing (it happens occasionally with AllExperts). The final volume should be 20 plus x. You have...
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2008-08-19 Mass of sugar dissolved in water: Hi Darlene, You are correct; the mass of the sugar water will be 120 g. What does change is the density of the solution. The density of water is about 1 g/mL. In other words 100 grams of water will occupy...
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