Oxygen candle

Put out the flame with a candle snuffer. A candle snuffer safely starves the flame of oxygen and assures the flame goes out without splattering any wax. If you do not own a snuffer, you can use a metal spoon to extinguish the flame. Do not use water to put out a candle. Mixing cold water and hot wax can result in wax splatters and possibly burns.

Oxygen candle. American Institute of Aeronautics and Astronautics 12700 Sunrise Valley Drive, Suite 200 Reston, VA 20191-5807 703.264.7500

The chemical aspect: oxygen O 2 and paraffin C n H 2n+2 react. The burning produces water H 2 O and carbon dioxide C O 2. For n=1 we balance the equation as follows: 2 O 2 + C H 4 = C O 2 + 2 H 2 O. Because twice as much oxygen is burned than carbon dioxide released, the air volume decreases.

MOXIE (Mars Oxygen In-situ Resource Utilization Experiment) is lowered into the chassis of NASA’s Perseverance in 2019. During the mission, MOXIE extracted …Zaris May 6, 2021 @ 1:06am. In the first area you need o2 packages or oxygen candles to move around in a ~200-500m distance without running out of o2. After that you get your first vehicle, suit o2 upgrades, faster vehicle and so on to easily cross the whole world map. The second part of the game completely ignores o2 because it was "rushed ...The third way to provide oxygen therapy is by using an oxygen concentrator. Each method is examined in more detail below. Compressed Gas amount of oxygen gas that is Oxygen is stored under pressure in a cylinder equipped with a regulator that controls the flow rate. Because the flow of oxygen out of the cylinder is constant, an oxygen-A lighted candle is placed inside each gas jar as shown. The time taken for each flame to go out is measured. As the candles burn they use up the oxygen available in the jar. gas jar X gas jar Y lid air sample candle The table shows the results of this experiment. gas jar time for candle flame to go out / s X15 Y9In practice, each candle burns near 400oC for 45-60 minutes, and produces approximately 115 SCF (standard cubic feet) of oxygen gas at 0.5 psig (pounds per square inch, gauge pressure), which is enough oxygen for about 100 people. As you might suspect, since they are self-sustaining in oxygen, the stored candles represent a significant fire hazard.Once the candle begins burning, the heat released by the reaction of the wax and oxygen is sufficient to start the reactions with nearby wax molecules. *Using the term "burn" to describe the reaction typically implies that one of the reactants is molecular oxygen, O 2. Answer 3: A burning candle means that the wick is on fire and the wax is ...

A nasal cannula is a medical device to provide supplemental oxygen therapy to people who have lower oxygen levels. There are two types of nasal cannulas: low flow and high flow. The device has two ... Oxygen Candle lvl-1 ¥20 1[10 hours] oxygen candles are chemical O 2 generator that smolders when lit. When used in an enclosed space measuring 10 cubic feet, an oxygen candle releases enough oxygen for a single medium creature to breath for 10 hours. An oxygen candle is consumed upon use. Magboots lvl-2 ¥750 20[1/hr]If the sub loses power and it cannot produce oxygen the primary way, the crew will light an oxygen candle. Electrolysis. Producing oxygen through a process of electrolysis is easily achievable on a submarine with a nuclear reactor. The process takes a lot of energy to produce the desired life-saving gas. However, one thing the video above ...To be safe, it helps to carry four oxygen candles, at least one alcohol, and at least one grabber. Head out of the spaceship and head towards the nearby coolant stream.Every candle is fueled by its wax, and the wick is the vehicle, which creates a capillary action, that carries the fuel to keep the flame burning. A process, called combustion, is what happens when you have a carbon (in this case, wax) react with oxygen in the air. The reaction creates light, and the burning fuel produces carbon dioxide.Oxygen candle. A chlorate candle, or an oxygen candle, is a cylindrical chemical oxygen generator that contains a mix of sodium chlorate and iron powder, which when ignited smolders at about 600 °C (1,112 °F), producing sodium chloride, iron oxide, and at a fixed rate of about 6.5 man-hours of oxygen per kilogram of the mixture. The mixture ...The Chemical History of a Candle. Lecture V.—Oxygen Present in the Air—Nature of the Atmosphere—Its Properties—Other Products from the Candle—Carbonic Acid—Its Properties. W E have now seen that we can produce hydrogen and oxygen from the water that we obtained from the candle. Hydrogen, you know, comes from the candle, and oxygen ...Candles require oxygen to burn and this can result in suffocation. All candles, especially those made from paraffin wax, produce soot or black smoke, which can trigger or aggravate breathing problems.

Close your closet doors. When you open your doors or windows to let in fresh air, close the doors to your closets, pantries, and other areas that don't lead anywhere. This helps air move throughout your house without getting trapped, bringing fresh, oxygenated air throughout your home. [6] 3. Install extractor fans.Oxygen Candles. A chlorate candle, or an oxygen candle, is a cylindrical chemical oxygen generator that contains a mix of sodium chlorate and iron powder. Why does a submarine have a conning tower? A conning tower is a raised platform on a ship or submarine, often armored, ...Hello I was wondering about oxygen stations in the game. Normally you have to refill them using a oxygen generator and they only have 500 oxygen stored. In the ingame encyclopedia you can find the following interesting detail about oxygen stations: "The station can also be installed on some debris instead of damaged stations, which will give endless oygen." I havn't found any clue about where ...candle ( plural candles ) A light source consisting of a wick embedded in a solid, flammable substance such as wax, tallow, or paraffin . light a candle. blow out the candles on the birthday cake. snuff out the candle. The protruding, removable portion of a filter, particularly a water filter. ( obsolete) A unit of luminous intensity, now ...Oxygen candle - 14 products on Joom. If you're looking for high-quality and affordable oxygen candle - you'll find the best oxygen candle at great prices on Joom - from 4 to 59 USD. A wide range of available colours in our catalogue: Black, Multicolor, White, Yellow, Blue, Gold, Green, Orange, Purple, Transparent.

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Chemical oxygen generation (COG) is used in commercial airliners to supply emergency oxygen to passengers and crew if the plane is depressurized. Weight for weight it produces far more oxygen than compressed oxygen tanks. I read the original paper on COG, several sites from oxygen candle manufacturers and the US Federal Aviation …Procedure: 1. Light a candle and let 3-4 drops of wax fall in to the center of the pan. Press the candle into the melted wax and hold it upright until the wax solidifies. 2. Light the candle. Carefully observe the flame. List at least 8 observations of the flame. Look at the colors and the shape of the flame.When the oxygen is depleted, the candle goes out and the air cools. The volume of the air decreases and the water rises. The temporary temperature change delays the rise of the water. As several readers have pointed out, also the water condensation should be mentioned. While water is initially gas, it condenses and helps to delay the effect.The candle's flame burns until extinguished by oxygen deprivation, creating a carbon dioxide-rich, oxygen-poor atmosphere. Newer oxystat bioreactor methods allow for more precise control of gas levels in the microaerobic environment, using a probe to measure the oxygen concentration or redox potential in real time.As the oxygen is consumed and the candle goes off, the air (gases in fact) inside the glass cools down. As the number of moles \(n\) is now fixed, decreasing the temperature will decrease the pressure and this will suck water in the glass. In equilibrium the temperature in the glass will be the same as the room temperature, the pressure will be ...

The oxygen candle is the third and final breathable air supply method. It uses an exothermic chemical reaction to generate oxygen. An oxygen candle will burn for approximately 60-90 minutes, producing 2600L of oxygen; about 20 hours of …This is a fun visual demonstration for kids of how fire needs oxygen to burn. Place two candles inside of cups (or jars), and see which goes out first - the ...Product Details | OXYGEN CANDLE. 4460-01-043-7635. Part Alternates: 510150, 4460-01-043-7635, 01-043-7635, 4460010437635, 010437635. Furnace, Steam Plant, and Drying Equipment; and Nuclear Reactors | Air Purification Equipment. Supply Group (FSG) NSN Assign. NIIN Item Name Code (INC) 44: 30 JUN 1977: 01-043-7635:193.9K Likes, 2.2K Comments. TikTok video from SmarterEveryDay (@smartereverydayfan): "How Do Nuclear Submarines Make Oxygen?- Smarter Every Day . #smartereveryday #new #nuclear #submarine #make #oxygen #surface #viral". oxygen candle. How Do Nuclear Submarines Make Oxygen?- Smarter Every Day . Part 6Frontier - xige12138.Burning candles releases volatile organic compounds and particulate matter into the air. Particulate matter is a mixture of extremely small liquid droplets and particles that can enter your lungs ...Candle in a Jar With Water. Source: Steve Spangler Science 52. Cleaning with Lemons. Lemon juice is excellent for removing stains, grease and stink. Squeeze a lemon and apply its juice on stains in the bathtub, greasy pans and the sink. After a few minutes, wipe it with a paper towel and check the results.For step-by-step instructions on how to conduct this experiment watch the video at the beginning of the article or continue reading…. Put the candle in the middle of the plate and lit it. Pour the colored water (around 2 dl) on the plate so it surrounds the candle. Cover the candle with the glass. Watch carefully!Zivot compared inhaling an inert gas without oxygen to placing a jar on top of a candle. Cells shut down similar to how a flame is snuffed out as it burns off remaining oxygen.Close but not quite, there is just one 'candle' on airplanes usually in the cargo hold that supplies the oxygen to every mask. The jerk is to remove the pin that acts as a valve. Oddly the oxygen masks have never actually saved a life on a …Looking for a great deal on Yankee Candles? Check out the Yankee Candle outlet! Here you’ll find a wide selection of Yankee Candle products at discounted prices. The Yankee Candle outlet is a great place to find discounts on candles.

Candle wax is just paraffin, a hydrocarbon. As the name implies, a hydrocarbon contains just hydrogen (H) and carbon (C). When candles burn, most of the wax reacts with oxygen (O) in the air to form water vapour (H 2 O) and carbon dioxide (CO 2). Both water vapour and carbon dioxide are gaseous and invisible.

Written by Teresa Dumain Do I Need It? How Much Will I Need? Equipment Oxygen Safety 4 min read Your body can’t live without the oxygen you breathe in from the air. But if you have lung disease...Oxygen is forced away from the candle because it is heavier than carbon dioxide.The candle is suffocated by carbon dioxide and the flame is extinguished. Why did the flame snuff off when the glass covered the candle? The oxygen in the air inside the glass tumbler is used to burn the candle.Carbon dioxide is converted … Continue reading "Will a candle stay lit in Coke?"Fire requires oxygen to burn; The baking soda and vinegar makes a chemical reaction that makes carbon dioxide gas; When you pour the carbon dioxide gas over the candle, it pushes the oxygen out of the the cup. This is because carbon dioxide is heavier than oxygen, so CO2 sinks, and O2 risesA nasal cannula is a medical device to provide supplemental oxygen therapy to people who have lower oxygen levels. There are two types of nasal cannulas: low flow and high flow. The device has two ... To improve oxygen generation performance, we dissected and analyzed the incompletely reacted oxygen candles and thus proposed the concept of the hollow-structured oxygen candle. We calculated the surface area ratio and designed the mold for hollow-structured oxygen candles at a radius of 0, 5, 9, 12, 15.5, and 20 mm. The structural stability of the oxygen candles was tested by the ...The Oxygen breathing apparatus (OBA) ... which is the normal burn time of the "candle", and the mask will initially fill with a light, harmless smoke. [clarification needed] The heat of the chemical reaction requires the use of thick leather gloves for handling spent canisters. The bags along either side of the chest unit cool the air mixture ...Shining a Light on Candles. Glancing up at a 700-person crowd in December 1860, Michael Faraday, the renowned scientist who uncovered the fundamental principles of electrochemistry and electromagnetism, ignited the large room by boasting his best example of nature's beauty: the humble candle. Although Faraday's work led directly to such ...THE SECRET STASH OF OXYGEN CANDLES, LIGHT BULBS & CONDOMS!! - Breathedge Tips & TricksRight guys, welcome back to Breathedge. In this video I'm going to be s...This prevents oxygen in its top layer of water from ever mixing into its deep layer. Less than 1% of lakes are meromictic, and most that are have dense, salty bottom …

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Test 2: Combustion of candle wax. Place a small candle on a glass plate and light it. Then uncover and carefully lower Bottle #2 (oxygen-filled) over the candle. Measure and record the number of seconds that the candle continues to burn. Then re-light the candle lower the empty bottle (air-filled) over it.The oxygen generator preferably includes a canister (14), oxygen-generating candle (12), and an ignition device (16). Triggering of the ignition device ignites an ignition pellet (52) which initiates decomposition of the candle body (50). Once initiated, the candle will sustain decomposition to release breathable oxygen until the candle is ...Solution 1. You blow away the flame from its fuel source. If you would blow less hard the flame might burn harder because more air is supplied to the flame (similar to a Bunsen burner). Because normally the flame of a candle gets its oxygen through a convectional airflow generated by the heat of the flame. The reason why the flame is blown away ...The candle will only go out once it runs out of wax or oxygen—or gets blown out. After a candle goes out you can actually see the wax vapor escaping as a stream of white smoke.Oxygen candle oxygen supply experiment was conducted; the oxygen candle composition for the test was determined to be NaClO3 (86%), Mn (6%), Co3O4 (5%), and kaolin (3%); in the four stages of the ...Oxygen was discovered in 1774 by Joseph Priestley in England and two years earlier, but unpublished, by Carl W. Scheele in Sweden. Scheele heated several compounds including potassium nitrate, manganese oxide, and mercury oxide and found they released a gas which enhanced combustion.. Priestley heated mercury oxide, focusing sunlight using a 12-inch 'burning lens' - a very large ...Candles can have effects on your body's filter, the lungs. The lungs are our source of oxygen, and the less oxygen we intake, the worse our body functions. Poor air quality is linked to a variety of health issues such as irritated eyes, nose, and throat. Along with shortness of breath and other respiratory issues.1 de ago. de 2021 ... TSA plates in 3 different oxygen environments · Label 3 plates for the table---candle jar, ambient air, and GasPak anaerobic jar. · Divide the 3 ...The balloon boosts your oxygen reserves and is crafted with a Condom, a piece of Wire, Thick Electrical Tape, and two pieces of Plastic. You can place the Oxygen Station anywhere to refill your oxygen when out exploring. To craft one, you will need an Oxygen Candle, a piece of Aluminum, and Thick Electrical Tape.The crash of ValuJet Flight 592 was caused by improperly labeled and packed oxygen candles being shipped. One triggered which led to a cascading set of fires. The cargo hold was designed to suppress fire by being air tight. If a fire started, it would be extinguished as it quickly used up all the oxygen in the hold, and the lining was durable enough to …Once you place the candle snuffer on the candle, the candle stops burning due to the lack of oxygen. Candle snuffers are inexpensive. They can be found at local retailers or online stores. You can also make a DIY candle snuffer using foil. Make a bell shape using the foil and attach it to a long stick or rod. ….

Apr 26, 2017 · I assume that an oxygen torch in the movie is just a different-looking kind of blow-torch that uses oxygen as fuel. It matches all the 3 features you described. It has a compressed oxygen tank as a supply, thus is able to produce limited amounts of oxygen; It generates light when oxygen burns; It generates heat when oxygen burns A candle flame is the result of a chemical reaction between wax gas and oxygen in the air. When you trap the candle in a jar, it only has a limited amount of oxygen. Josh finds out that in larger jars, there’s more oxygen so the candle can keep burning for longer, but that the flame will eventually go out.Your oxygen tank and other equipment should also be kept at least five feet away from the stove and other heat sources at all times. When you are using oxygen, beware of all sources of open flames: this includes lighters, matches, candles, fireplaces, cigarettes, gas burners, etc.When a candle burns, the hydrogen and carbon from the wax combine with the oxygen in the air to become carbon dioxide and water vapor. Most of the matter in the candle ends up as these two gases ...It's a very popular experiment (), from elementary school : put a burning candle on a dish filled with water, cover the candle with an inverted glass: after a little while, the candle flame goes out and the water level inside the glass rises.The standard explanation (as I recall it) was that combustion "burns" oxygen, and the consummed volume accounts for the extra water that goes inside the ...Oxygen candle oxygen supply experiment was conducted; the oxygen candle composition for the test was determined to be NaClO 3 (86%), Mn (6%), Co 3 O 4 (5%), and kaolin (3%); in the four stages of the oxygen candle oxygen supply reaction test, the average oxygen supply rate reached 1.647 L/min, actual oxygen production was 28 L, and effective ...Terjemahan frasa OXYGEN CANDLES dari bahasa inggris ke bahasa indonesia dan contoh penggunaan "OXYGEN CANDLES" dalam kalimat dengan terjemahannya: I will use the oxygen candles to lure Calvin into boat...They call them oxygen candles, and each candle burns for about 45 minutes, producing enough oxygen for 100 men. The chemical reaction producing the oxygen is started at one end with either a hot ... Oxygen candle, Burning requires oxygen, preventing passage of oxygen to flame, extinguishes it. This experiment shows easy way to prove that oxygen is required for burning..., Based on your research, think about what would happen if each of those gases were held near a lit candle. (Answer: If it were oxygen or hydrogen, it would continue to burn or burn more quickly; if it were carbon dioxide, it would extinguish the flame.) Poke the candle into a large lump of clay, and place the clay onto the bottom of a large jar., Mechanism Zones in a candle flame The interior of the luminous zone can be much hotter, beyond 1500 °C. Color and temperature of a flame are dependent on the type of fuel involved in the combustion, as, for example, when a lighter is held to a candle.The applied heat causes the fuel molecules in the candle wax to vaporize (if this process happens in …, A candle flame is the result of a chemical reaction between wax gas and oxygen in the air. When you trap the candle in a jar, it only has a limited amount of oxygen. Josh finds out that in larger jars, there’s more oxygen so the candle can keep burning for longer, but that the flame will eventually go out., I recommend you to take with you several large oxygen candles plus having the rocket vacuum cleaner, and the obsolete jet (gives you like 25 m/s boost). A, There is a recipe for a gum (sorry don`t remember where I found it) B. I think there is a hull-mod, that increases strength. Solar panels help some too!, Oxygen candles had not been invented yet and so the military needed to improvise a way to reduce or eliminate the use of conventional candles which would burn out the breathable air for the operator. However, the military needed another more efficient and cost effective way to maximize the time a crew could remain under water., The Ready Hour 100-Hour Candle is a cost-effective, efficient light source for emergency and survival applications. The 100-Hour Candle is clean-burning, odorless and smokeless, making it a safer choice for indoor use.It features a proprietary blend of paraffin and other liquids to maximize the life, light and warmth of the candle. Shatterproof container is lightweight, yet designed for stability., A glimpse into the open hatch shows us that the oxygen source is a metal cylinder about the size of a thermos (25 cm long with a diameter of 7 cm) (see Fig. 5) [38,39]. This metal cylinder is known as a …, Fly there, locate the blown up engineer's ship there and just a bit above it, close to oxygen candle there is a photo floating." #2 at screenshot; Leia IRC Badge *Items @GunTyphoon "Once you are able, get ready to fly to the right from starting point, toward the 3 gravity blocks. Aim for the one that has pit in it, floating rock above and ..., Mar 22, 2007 · The candles themselves are cylindrical chemical oxygen generator containing a mix of sodium chlorate and iron powder. When ignited, the mixture smoulders at about 600 °C, producing sodium chloride, iron oxide, and about 6.5 man-hours of oxygen per kilogram of the mixture releasing oxygen at a fixed rate. , Fix a candle in a container. Fill the container with water. Light the candle and then cover it with an inverted glass. It is said that the oxygen in the space of inverted glass will be used up and to fill the space that was previously occupied with oxygen the water level will rise., A sodium chlorate solid oxygen candle is at the core of a chemical oxygen generator ... Moreover, chemical oxygen candles must be transported with extreme ..., The candle was extinguished after 30 seconds when the air was made up with 18.8% oxygen. This shows that the candle flame requires an oxygen level of greater than 18.8% oxygen to remain alight. Observations. The candle extinguished in 30 seconds when the oxygen level was 18.8%., • Never use a candle if oxygen is used in the home. • Have flashlights and battery-powered lighting ready to use during a power outage. Never use candles. Candle Safety Candles may be pretty to look at but they are a cause of home fires — and home fire deaths. Remember, a candle is an open flame, which means that it can easily ignite ..., The discovery of oxygen and the chemical revolution of Joseph Priestley. Priestley's lasting reputation in science is founded upon the discovery he made on August 1, 1774, when he obtained a colourless gas by heating red mercuric oxide.Finding that a candle would burn and that a mouse would thrive in this gas, he called it "dephlogisticated air," based upon the belief that ordinary air ..., The best performance of the oxygen candles is obtained when r = 9 mm, where the highest extent of combustion reaction is 98.3%. The total oxygen generated is 48.75 L, and the average rate is 9.2 L ..., The chemical aspect: oxygen O 2 and paraffin C n H 2n+2 react. The burning produces water H 2 O and carbon dioxide C O 2. For n=1 we balance the equation as follows: 2 O 2 + C H 4 = C O 2 + 2 H 2 O. Because twice as much oxygen is burned than carbon dioxide released, the air volume decreases., Oxygen 100% Fragrance Oil for Candle making,Diffusers, Soaps, Lotions and Home Scents - Various Sizes Available. (60) $7.50. Here is a selection of four-star and five-star reviews from customers who were delighted with the products they found in this category. Check out our oxygen candle selection for the very best in unique or custom, handmade ..., Candles sold in the United States are subject to various regulations, safety standards, labeling, and other compliance requirements. In this guide we take a closer look into 16 CFR Part 1500.17, ASTM standards, California Proposition 65, country of origin marking, and other compliance requirements that US candle manufacturers and …, A candle flame is formed because wax vaporizes on burning. A candle flame is widely recognized as having between three and five regions or "zones": Zone I – this is the non-luminous, lowest, and coolest part of the candle flame. It is located around the base of the wick where there is insufficient oxygen for fuel to burn., Burning candles releases volatile organic compounds and particulate matter into the air. Particulate matter is a mixture of extremely small liquid droplets and particles that can enter your lungs ..., Deployed in emergency situations in submarines, mines and safe havens all over the world, Molecular Products' O2 candles are trusted life support systems when it matters most. RELIABLE First time, every time. MPOGs, EO2-30s and CAN-33s activate first time, every time., The discovery of oxygen and the chemical revolution of Joseph Priestley. Priestley's lasting reputation in science is founded upon the discovery he made on August 1, 1774, when he obtained a colourless gas by heating red mercuric oxide.Finding that a candle would burn and that a mouse would thrive in this gas, he called it "dephlogisticated air," based upon the belief that ordinary air ..., For example, we are used to the fact that a candle emits light when burning and absorbs oxygen from the air, releasing carbon dioxide. And on spacecraft and orbital stations there is always a supply of amazing candles burning without light, but with the release of oxygen. “Oxygen candle” in the movie “Life”. In fact, it does not glow ..., Specifications Oxygen Produced per Unit: > 3341 Liters Weight of Unit: (candle only) 26 - 26.5 lbs. Weight of Unit: (candle in can) approximately 28 lbs. Width: 11 3/8″ - 115/8″ Burn Time: 50 minutes +/- 10 minutes Carbon Monoxide Generated: < 25 parts per million (ppm) Chlorine Generated: < 2.5 parts per million (ppm) Additional Information, Stages of the oxygen cycle. The oxygen cycle includes the following steps: Stage 1: As a by-product of photosynthesis, all green plants release oxygen into the atmosphere. Stage 2: All aerobic organisms need free oxygen for respiration. Stage 3: Animals emit carbon dioxide, which plants re-absorb during photosynthesis., To burn, a candle needs oxygen, fuel (wax), and heat. The wick works as a catalyst. It keeps the heat, drawing up the fuel. So the wick is essentially a helper to keep the candle alight. When you're burning a candle, it is only the upper surface that is exposed to oxygen, so the progression of the fire is slow. As long as this is kept small ..., An oxygen candle, also known as a chlorate candle, produces oxygen when ignited. The cylindrical chemical oxygen generator contains a mix of iron powder and sodium chlorate. It is used in planes and space stations in emergencies as a backup source of breathable air. Allison Jess/ABC local. , Large Oxygen Candles (2) Lead (8) Resin (2) Thick Electrical Tape (2) Titanium (7) When you're ready, travel past Engineering Shuttle #1 into the area to the left of the blue coolant. This is my ..., Please Subscribe., The importance of oxygen cannot be overplayed. Now, 250 years since oxygen was discovered, it is timely to revisit some of the history, the controversies and look at how oxygen has evolved during that time. Here, a few of the highlights in oxygen research are discussed. ... a new gas was liberated in which a candle burned furiously and a mouse ..., Specifications Oxygen Produced per Unit: > 3341 Liters Weight of Unit: (candle only) 26 - 26.5 lbs. Weight of Unit: (candle in can) approximately 28 lbs. Width: 11 3/8″ - 115/8″ Burn Time: 50 minutes +/- 10 minutes Carbon Monoxide Generated: < 25 parts per million (ppm) Chlorine Generated: < 2.5 parts per million (ppm) Additional Information, From his Chemische Abhandlung, one gets the impression that Scheele first obtained oxygen while distilling a mixture of potassium nitrate (saltpetre) and sulphuric acid, the standard procedure for preparing nitric acid in Scheele's days.At the end of the distillation, the hot residue gave of a gas, which Scheele collected in an ox bladder. He found that this gas sustained combustion and that ...