Silver becomes black because of hydrogen sulfide (sulfur), a substance that occurs in the air. Also sweat (which ammonia occurs in) raises the acidity of the skin and…

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Which boils first water or alcohol? The standard explanation, when there is one, is that alcohol boils at 173 degrees, while water doesn’t boil until 212 degrees, and…

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Ethyl alcohol has a low boiling point. Because there are less extensive hydrogen bonding between ethanol molecules than between water molecules, thus less energy is needed to vaporise…

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Different types of alcohol have different boiling points, so this can be used to separate them from each other and from other organic compounds. … The boiling point…

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Can I use hydrogen peroxide solution to clean surfaces from coronavirus? Moreover, a hydrogen peroxide solution of a concentration as little as 0.5% efficiently inactivates coronaviruses (e.g. SARS,…

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Never spill any liquid inside the laptop! Isopropyl, or “rubbing,” alcohol makes a good cleaning liquid. Do not use it to clean the monitor. Avoid using any detergent…

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What are some concerns? Do not use isopropyl alcohol for any other component than thermal paste, fans or the motherboard. Use alcohol gently applied to a cotton swab,…

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91% is fine. Just give it an extra few seconds to dry. I use it since you can find it at Wal-Mart and I couldn’t find 99% without…

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The cooling effect of evaporation is obvious when you dab some rubbing alcohol on to your skin. You will have a sensation of coolness as you watch the…

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For common distilled spirits, such as whiskey, vodka, gin, rum and tequila, the general rule of thumb is to store them at room temperature. Though some experts say…

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