Chemistry

Blue silica gel in a sachet when it is saturated in pink color if you keep the sachets in storage will they leak moisture and absorbed water? I restored a sachet of silica gel in the microwave device at maximum power for 3 minutes and it released a little water but if the same thing happens with the saved sachets it will damage my objects

Is plastic e.g. polyproylene, polystyrene etc mostly inert to most substances at room temperature? I only know that plastic does not like heat.

Greetings. Since high school chemistry, learned the formulas of compounds always using whole numbers. What is this way of subscript ? ---> ...showed that GdSi2Ge2 and LaFe11.384Mn0.356Si1.26H1.52 had TEWIs that were always lower... Never seen before; can anyone explain ? (text copied from a website)

Ca(CH3COO)2 + 2NaOH ---> 2CH3COONa + Ca(OH)2 or 2CH3COONa + Ca(OH)2 ---> Ca(CH3COO)2 + 2NaOH

does a reaction occur when CaCO3 and NaHCO3 are added?

The reaction between Ca(CH3COO)2 + Na2CO3 ---> CaCO3 + 2CH3COONa But why can't the same displacement reaction happen when NaHCO3 is added to Ca(CH3COO)2 Why does it show that no reaction happens when they are mixed? (type it in google)

Greetings. These photoluminescence compounds absorb the energy of photons? by raising their energy level, then emit light on the energy decay. -I think- About intensity; the more energetic the exposure, the larger the emission return. Color... is violet/ultraviolet the light that energizes it the most ? Now; what about the time ? Exposing the photoluminescent material to light, I would say becomes 'charged' at the speed of light' . What if the exposure time is not 1 second but 1 minute ? What changes when light is released ? In other words, the exposure time affects the emission in intensity or duration or both ? ...and why ? Is the light e…

As the title suggests, how do u seperate NaHCO3 and CaCO3 ?

How much kilo joules per mole is enough to hurt or even be noticed by a human? Is 63.6 Kj/mole a lot?

Looking for information on Platinum Catalyst hand warmers, not sure if this is the right place, perhaps someone can direct me. My wife has used "peacock" style hand warmers for some time, they use lighter fluid and a platinum infused pad to produce a catalytic reaction that produces heat. the catalyst pads "wear out" so to speak and need to be replaced. I am curious if there is a simple way to just make my own. they look like this: and are inserted into this piece( which is placed on top of a unit that contain cotton batting that soaks up lighter fluid): the reaction is started by holding a flame close to but not igniting the pad for about 10 …

Assuming that carbon is the element of which makes something like Fanta or Coca Cola fizzy, is there a way to remove that is a short period of time ? Such beverages go "flat" after being exposed to oxygen, could I therefore introduce that to achieve the same aim ?

Rocks and minerals undergo interesting transformations over time. In particular, one of the minerals, which has a relatively high hardness of 6 on the Mohs scale, turns into a common secondary mineral with a hardness of 2. Over time, as a result of weathering, it turns into one of the most common soft rocks in the world. But the transformation does not end there: humanity (in particular, on the territory of Ukraine) even in ancient times invented how to make the first solid artificial material from it. What kind of minerals, rock and artificial material are these?

I like doing simple home gadgets for fun and to learn something new. I am trying to do a simple DIY room dehumidifier consisting of calcium chloride, a fan blowing over it and water collecting cup. But i also found some health concerns regarding calcium chloride - namely using it at home and blowing into it, the dust is supposed to not be to good for lungs. Since i do not know much about chemistry i have 2 questions that i hope you can help me with: 1) I am thinking whether it would be possible to cover the fan exhaust with some kind of filter to prevent this dust to enter the room air. But i need to know how small this dust is to know the MERV value of filter i need…

I find that when I cook with oil, if the pan isn't hot enough, the oil runs slowly, but when it gets hot enough, the oil runs faster. How to explain this phenomenon?

Hello, I want to know the meaning of discharge and gradient in the following context: In the absence of sunlight, vent chemistry supports chemolithotrophic prokaryotes that synthesize sugars by oxidizing hydrogen sulfide and other geofuels including hydrogen, methane, ammonia, ferrous iron, and manganese. (This is analogous to the photosynthetic capture of CO2 powered by electrons obtained from water and energized by light absorption.) According to one model, the discharge of alkaline water through the porous chimneys of white smokers would have created a natural pH gradient in ancient oceans that might have served as a foundation for the origi…

how hard do you need to hit nitroglycerin to ignite it

What is the actual chemical compound of the texture of our clothes that are commonly available in the commercial market? Is different color of clothes due to addictive added during the manufacturing process or the natural color of the compound of the raw materials? What are usually the chemical reactions that will be done to raw materials to make it become clothes? I know it's a broad question but I am looking for some understanding on this issue.

When we touch something, even lightly, is it true that some of atoms/molecules from our skin will pass into that thing while some of atoms/molecules from that thing will pass into our skin?

I think many substances, if not all, can be degraded or destroyed when temperature is high enough because heat facilitates many chemical reactions. On the other hand, is there any chemical reaction that would be accelerated when temperature drops? Or is there almost never any chemical reaction that would be favored at low temperature while inactive at high temperature?

Is it always worse or better to heat a plastic container with food above boiling water, rather than to microwave it? I do not have a microwave oven and I am always heating up packaging food above boiling water that is supposed to be microwaved, is it better, worse, or shouldn't have any difference, in terms of the effects to the food?

I intend to get groceries later today and hopefully will remember the vinegar this time, but in the meantime if I use lime juice to get tape residue off the windowsill, and wipe it down with water afterwards, are there any particular precautions I need to make against it attracting mold or other harmful organisms?

In photosynthesis, chlorophyll is the catalyst which helps in forming of glucose and oxygen in plants. Now, since a catalyst DECREASES the activation temperature, the plant can use just sunlight as the energy input. Now, how much temperature is needed to make glucose without chlorophyll. Like in a test tube. Photosynthesis Formula:- 6CO2 + 6H2O ->(chlorophyll, sunlight) C6H12O6 + 6O2

Ok so I know that it takes energy to split a chemical bond and energy is released when a chemical bond is made My question is:- is the energy required to break a bond = energy released when the Same bond is created

Is it true that UV will break bonding of many substances which then in turn give out free radical that attack other bonding to create unstable intermediate? Will those free radical end up as a stable product one day or will they just keep colliding and giving more free radical which will never end?