Questions tagged [chemistry]
The science of matter and the changes it can undergo.
157 questions
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Are water-based electrolyte batteries limited to 1.23 volts per cell at most?
In the popular YouTube channel Veritasium, generally known for rigorous research and not making false claims continuously, there was a video about lithium ion batteries, The Perfect Battery Material ...
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Are any home lead testing kits effective for general use (not just paint)? [closed]
There are many people on TikTok and other social media loudly declaring “there’s lead in product X, it’s unsafe!” using lead testing kits they purchased online. Common subjects of these tests include ...
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Does scouring a stainless-steel pan cause it to release metals into food?
The cookbook "Let's Cook It Right", by Adelle Davis contains the following claim (on page 4 of at least one edition - I'm not sure which edition this is but it's likely from the late sixties ...
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In the event of a siren warning the public of a gas leak, is it actually advisable to listen to the radio when smelling gas?
The Finnish website pelastustoimi advises to listen to the radio in the event of smelling gas.
If you are already indoors and smell gas
put a wet cloth in front of your mouth and breathe through it
...
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Can using the brushes or combs of people who dye their hair render my hair white? [closed]
My parents always caution me to not use their hair brushes or combs as they apply dyes (to dye their hair black) on a regular basis. According to them, my hair will start whitening. I am very insecure ...
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Is photosynthesis 60% efficient?
In this article it is claimed that photosynthesis efficiency could be up to 60%.
The closest process to artificial photosynthesis humans have today is photovoltaic technology, where a solar cell ...
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Can the molecular bond angle of water be changed via distillation?
John Ellis claims that water has a "hydrogen bond angle" ranging from 104° to 114°, and that his patented distillation machines can produce water with a permanent hydrogen bond angle above ...
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Does only China uniquely possess some 'rare earth elements' that can't be mined elsewhere?
How rare exactly are 'rare earth elements'? I'll use IUPAC's definition.
A rare-earth element (REE) [...] as defined by the International Union of Pure and Applied Chemistry, is one of a set of ...
user16959
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Are pomegranate seeds edible? [closed]
My dad usually eats cherry seeds, which seemed dangerous to me, so I searched it online and indeed it can be dangerous. Today, I was about to eat a pomegranate but I wasn't sure if the seeds are ...
user50555
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Does calcification of the pineal gland negatively affect normal bodily functions? [duplicate]
I received this link from an associate of mine. It smells like pseudo-scientific bull to me, but there are a LOT of claims made in the article that I can't really debunk all by myself.
To quote from ...
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Does this video show a Hong Kong protestor disabling a tear gas cannister with liquid nitrogen?
A recent tweet from @PatriotCoburn says:
Holy Shit the protesters in Hong Kong are grabbing the canisters of tear gas dropping it into liquid nitrogen and turning it into its harmless solid form.
It ...
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Does detergent help clean clothes in washing machines?
The Telegraph reported in 2008 that British historian Ruth Goodman:
stopped using soap in her washing machine and says the clothes come
out just as clean. "We're all victims of 150 years of hype ...
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Is Plant-e an actual company stating a serious premise? [closed]
This is what I read beforehand and then I reached the company page.
They state that plants produce energy. This happens when releasing stuff from the photosynthesis process, which is consumed by ...
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Is Roundup weed killer carcinogenic?
Monsanto have been found liable for the terminal cancer of a former groundskeeper exposed to glyphosate and other chemicals in their Roundup herbicidal product.
On Friday, a California jury hit ...
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Are 19.6 pounds of CO2 produced from burning a gallon of gasoline?
According to the U.S. Energy Information Administration,
About 19.6 pounds [8.89 kg] of CO2 are produced from burning a gallon of gasoline that does not contain fuel ethanol. About 12.7 pounds [5....
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Does Tesla's 70 kWh battery have 63 kg of lithium and if so, why? [closed]
I have found information that Tesla's 70 kWh battery pack has 63 kg of lithium: https://electrek.co/2016/11/01/breakdown-raw-materials-tesla-batteries-possible-bottleneck/
Considering there's only 13 ...
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Will plant-life on Earth end due to too little CO2?
According to a 2013 Daily Mail article :
greater evaporation and chemical reactions with rainwater will take away more and more carbon dioxide.
In less than a billion years, its levels will be too ...
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Do the vitamins in a smoothie degrade when put in the fridge?
I was discussing with a friend about my smoothies consumption and he argued that putting them in the fridge to consume them the next day was not good as the vitamin level/effect drops quickly.
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Does consuming foods rich in phytic acid prevent mineral absorption?
I've seen a lot of articles warning that consuming phytic acid can prevent the body from absorbing minerals. They recommend soaking beans, chickpeas, lentils and other phytic acid foods before cooking ...
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Are towers being built in China that can turn smog into diamonds?
This article about a new project that builds towers that can turn smog into diamonds makes some pretty incredible claims. It claims that:
Towers intended to turn carbon in the air into diamonds have ...
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Do Duracell batteries last longer than normal batteries?
The claim is
Up to 10 times longer lasting power
(*) vs. ordinary zinc carbon batteries in high powered toys and flash cameras
(picture from Amazon)
Do Duracell batteries last longer than Zinc Carbon ...
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Are recent claims from India of a car fueled by water and calcium carbide legitimate?
Recently, I came across a video and a news report where it has been reported that a man from India has invented a car which uses water as a key fuel component. The car runs on acetylene gas produced ...
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Is soap foam better for cleaning than soapy water? [closed]
Most people who wash something using soap (e.g. the dishes), seem to believe that the bubbles contribute a great deal in the actual cleaning. This is not something I explicitly saw written down ...
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Will storing plastic water containers on concrete cause contamination?
Several preppers make the claim that storing plastic containers with water on concrete floors is bad because chemicals from the floor can leak into the plastic and then end up in the water.
Here are ...
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Chemtrails : A dangerous govt. plot or just another debunked theory? [duplicate]
According to countless chemtrail research theories , trails left in the sky by high-flying govt. aircraft are dangerous chemical or biological agents deliberately sprayed for reasons undisclosed to ...
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