Why does my urine turn florescent yellow after taking a multivitamin?
A multivitamin is a supplement that contains a combination of vitamins and minerals, and sometimes other ingredients as well. Your kidneys and liver are very good at filtering out some types of vitamins and minerals that are excessive or are already at their optimum levels. For example, you really can't overdose on vitamin C because your body will filter it out via urine. In your case, I think that's what's happening. An excess of vitamin C usually makes your urine a very bright yellow. There is a dangerous downside to taking a multivitamin. Your body may already have the optimum levels it needs to function. However it does not have the ability to filter out these particular vitamins and minerals thus causing an overdose. This can damage certain internal organs that rely on specific levels of vitamins and minerals to function properly. I would highly advise you talk to your doctor, discuss your diet and have lab work done to see if you need a multivitamin. Most people do not. They only think they do because of commercial propaganda.
3 types of greenhouse gases?
Greenhouse Gas:Carbon Dioxide Chemical Symbol:CO2 About:Occurs naturally. Also a by-product of burning fossil fuels (oil, coal) and biomass as well as land-use changes and various industrial processes. Greenhouse Gas:Methane Chemical Symbol:CH4 About:Occurs naturally. Other sources are landfills, coal mines, paddy fields, natural gas systems, and livestock. Greenhouse Gas:Nitrous Oxide Chemical Symbol:N2O About:Generated by burning fossil fuels, in the manufacture of fertilizer and by cultivation of soils. Greenhouse Gas:Perfluorocarbons Chemical Symbol:Various compounds About:Human-made chemicals. A by-product of aluminum smelting. Also used as a replacement for CFCs in manufacturing semiconductors I gave you 4 just in case :) I hope this helps
Can lightbulbs help the body produce vitamin D like the sun does?
There are currently two bulbs manufactured for making vitamin D in the home. Scientists from Berkeley (and others) have determined neither works or is safe. Those who disagree manufacture and sell the bulbs. (smile)10 to 15 minutes of sun per day or every couple of days per week with some skin showing is still recommended as best to make adequate vitamin D for bone and teeth health, calcium absorption and use by bone, and some hormones.
Why is a yellow color more common in city street lighting than white?
Most street lighting comes in the form of high pressure sodium lamps, which produce the most amount of light for the least amount of electricity required to power them. The way it works is that the lamps have a quantity of sodium in them, and when electricity is passed through the sodium it gets excited and gives off an orange glow.While this is good for your local council’s energy bills, it’s not ideal for people driving on the road or walking on the pavement. Studies have consistently shown that people perceive an orange-lit street as darker than a white-lit street, even when identical levels of luminance are provided. It’s also been shown that white light doubles a driver’s peripheral vision and reduces their braking times by 25 per cent when compared to sodium orange. That’s a huge difference.So there you have it, street lamps are orange because they’re cheaper that way. The numerous disadvantages to people’s safety are the main reason why many towns and cities have been moving towards LEDs and high-intensity discharge lighting that provide a cleaner white light - new technologies mean white light doesn’t have to break the bank, and it could save a life or two.
What's the reaction between phenol and ferric chloride?
The important concepts to keep in mind are that coordination compounds (in situations like this, at least) will either undergo acid-base reactions or ligand-exchange reactions. Acid-base reactions result in neutralization and a precipitate, ligand-exchanges cause a color change. Phenol is a relatively strong acid (stronger than alcohol at least), and so is ferric chloride. I had to look around but this page says at the very bottom that all oxygen-containing compounds act as bases in the presence of Lewis acids (like ferric chloride).3ArOH+FeCl3⟶Fe(OAr)3+3HCl[math]3ArOH+FeClX3⟶Fe(OAr)X3+3HCl[/math] is the acid-base reaction, and you get a ferric phenolate salt as a precipitate.6ArOH+FeCl3⟶[Fe(OAr)6]3−+3H++3HCl[math]6ArOH+FeClX3⟶[Fe(OAr)X6]X3−+3HX++3HCl[/math] is the ligand-exchange. It's not immediately obvious, but you can rewrite the two reactions a different way and it becomes clear.3ArOH+[Fe(H2O)6]3+⟶Fe(H2O)3(OAr)3+3HCl[math]3ArOH+[Fe(HX2O)X6]X3+⟶Fe(HX2O)X3(OAr)X3+3HCl[/math]6ArOH+[Fe(H2O)6]3+⟶[Fe(OAr)6]3−+6H2O+3H++3HCl[math]6ArOH+[Fe(HX2O)X6]X3+⟶[Fe(OAr)X6]X3−+6HX2O+3HX++3HCl[/math]Those three H+[math]HX+[/math] ions are from the excess phenol. The ligand-exchange occurs only when the phenol is in excess and more water molecules can be replaced, making the iron compound ionic and soluble again.So depending on the context, you'll see the one with three or the one with six. Both are correct, but [Fe(OC6H5)6]3−[math][Fe(OCX6HX5)X6]X3−[/math] is the new complex and Fe(OAr)3[math]Fe(OAr)X3[/math] is an intermediate product.There is another answer here: What is the product of the chemical reaction between phenol and ferric chloride?Jagjit.