carbon monoxide?

SouthernBe

it only beeped once..about 10 minutes ago..should i be worried..i went to look at it and it only has one light and the light is red but it looks like it is flickering..the light is always red by the way..we have gas heat but our heat has been off for 2 months..our ac is on..where does carbon monoxide come from??

Answer
Carbon monoxide is a colorless and odorless compound produced by incomplete combustion and lethal at high levels ...

The alarm points on carbon monoxide detectors are not a simple alarm level as in smoke detectors but are a concentration-time function. At lower concentrations (eg 100 parts per million) the detector will not sound an alarm for many tens of minutes. At 400 parts per million (PPM), the alarm will sound within a few minutes. This concentration-time function is intended to mimic the uptake of carbon monoxide in the body while also preventing false alarms due to relatively common sources of carbon monoxide such as cigarette smoke.

That being said ... you need to evacuate your residence ....

CO poisoning symptoms include confusion, headaches, nausea, dizziness, vomiting, etc ....

Sources may be from your water heater, chimney, etc

You need to have your home evaluated by a professional ... or at the very least have the sensor checked ...

CO poisoning symptoms include confusion, headaches, nausea, dizziness, vomiting, etc ....

what is a safe level of carbon monoxide?

kalashniko

i bought a new digital carbon monoxide detector...it has readings up to 400( not sure what the units of measurement are) it records a week's worth of c0 levels...i had it for a couple of days and decided to check it and it said the highest reading of c0 so far was 131....but it didnt go off....so im assuming that that is still a safe/inhabitable area.....the question is....what is a dangerous level of c0 and who do i call to service my gasboiler/ gas heater cause those are the only things in my house that are powered by gas....do i call my gas guy? or my heating/cooling guy? thanks in advance

Answer
Carbon monoxide is measured in parts per million (ppm). Any CO levels higher than 10-20 should be alarming. Especially inside of a residence. If it recorded a CO level of 131 and didn't alarm, then you might want to look into getting a new detector. If you were home at the time the level was 131, you would be dead within a few hours. The signs/symptoms of acute (new onset) CO poisoning start out as headache, reddening of face, dizziness, and progress to nausea, vomiting, trouble walking and soon thereafter, unconsciousness and death. So yes, get a hold of a professional about your furnace, washer/dryer, or whatever your think the CO source may be. Hope this helps.

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what is the best gadget or technology that is made which is related to chemistry?

Chua

please help me...

i need it for my report..

.
.
.i need the gadgets whoch are really rare...

Answer
CO (poison) detectors - should be in every house in case furnace has issues

Sensors

Early designs were basically a white pad which would fade to a brownish or blackish colour if carbon monoxide were present. Such chemical detectors are cheap and widely available, but only give a visual warning of a problem. As carbon monoxide related deaths increased during the 1990s, audible alarms became standard.
The alarm points on carbon monoxide detectors are not a simple alarm level (as in smoke detectors) but are a concentration-time function. At lower concentrations (eg 100 parts per million) the detector will not sound an alarm for many tens of minutes. At 400 parts per million (PPM), the alarm will sound within a few minutes. This concentration-time function is intended to mimic the uptake of carbon monoxide in the body while also preventing false alarms due to relatively common sources of carbon monoxide such as cigarette smoke.
There are four types of sensors available and they vary in cost, accuracy and speed of response.[10] The latter three types include sensor elements that typically last up to 10 years. At least one CO detector is available which includes a battery and sensor in a replaceable module. Most CO detectors do not have replaceable sensors.
[edit]Opto-Chemical
The detector consists of a pad of a coloured chemical which changes colour upon reaction with carbon monoxide. They only provide a qualitative warning of the gas however. The main advantage of these detectors is that they are the lowest cost, but the downside is that they also offer the lowest level of protection.
[edit]Biomimetic
A biomimetic (chem-optical or gel cell) sensor works with a form of synthetic hemoglobin which darkens in the presence of CO, and lightens without it. This can either be seen directly or connected to a light sensor and alarm. Battery lifespan usually lasts 2-3 years. Device lasts on the average of about 10 years. These products were the first to enter the mass market but have now largely fallen out of favour.
[edit]Electrochemical
This is a type of fuel cell that instead of being designed to produce power, is designed to produce a current that is precisely related to the amount of the target gas (in this case carbon monoxide) in the atmosphere. Measurement of the current gives a measure of the concentration of carbon monoxide in the atmosphere. Essentially the electrochemical cell consists of a container, 2 electrodes, connection wires and an electrolyte - typically sulfuric acid. Carbon monoxide is oxidized at one electrode to carbon dioxide while oxygen is consumed at the other electrode. For carbon monoxide detection, the electrochemical cell has advantages over other technologies in that it has a highly accurate and linear output to carbon monoxide concentration, requires minimal power as it is operated at room temperature, and has a long lifetime (typically commercial available cells now have lifetimes of 5 years or greater). Until recently, the cost of these cells and concerns about their long term reliability had limited uptake of this technology in the marketplace, although these concerns are now largely overcome. This technology is now the dominant technology in USA and Europe.
[edit]Semiconductor
Thin wires of the semiconductor tin dioxide on an insulating ceramic base provide a sensor monitored by an integrated circuit. This sensing element needs to be heated to approximately 400 deg C in order to operate. Oxygen increases resistance of the tin dioxide, but carbon monoxide reduces resistance therefore by measurement of the resistance of the sensing element means a monitor can be made to trigger an alarm. The power demands of this sensor means that these devices can only be mains powered although a pulsed sensor is now available that has a limited lifetime (months) as a battery powered detector. Device usually lasts on the average of 5-10 years. This technology has traditionally found high utility in Japan and the far east with some market penetration in USA. However the superior performance of electrochemical cell technology is beginning to displace this technology

AP Chemistry homework help!!?

Faith

OK, so I did several problems, but there are slight differences when comparing my answers to the book answers. Can someone please find the mistakes.

1. A baby was born who weighs 3.91 kg and measures 51.4 cm. Convert the weight to pounds and ounces and her length to inches.

My answer: 8.62 lbs, 138 oz, and 20.2 in.
Book answer: 8lbs, 9.9oz, and 20.5 in.

2. The world record for the hundred meter dash is 9.74s. At this speed, how long would it take to run 1.00 x 10^2 yards?

My answer: 8.91 sec
I don't have the book answer for this problem, but an online answer states that it is 8.85 sec (100/11.3) where did the 11.3 come from?

Carbon Monoxide (CO) detectors sound an alarm when peak levels of carbon monoxide reach 100 parts per million(ppm). This level roughly corresponds to a composition of air that contains 400,000 micro grams carbon monoxide per cubic meter of air. Assuming the dimensions of a room at 18ft x 12ft x 8ft, estimate the mass of carbon monoxide in the room that would register 100ppm on a carbon monoxide detector.

My answer : 1.98 x 10^7 ug
Is my answer correct? If so, does that mean I complete ignore the 100 ppm when doing calculations?

Thank you!

Answer
1
As far as question 1 is concerned, I think you misunderstood what they were asking. The question wants you to take the weight in kg and convert it to a COMBINATION of pounds and ounces. In other words, they want the pounds as a whole number - and the fractional portion (.62) in ounces.
You converted kg to lb correctly 3.91 kg = 8.62 lbs ... or 8 lbs and (.62) x 16oz/lb = 9.92 oz. Instead, you gave the answer as a decimal and then converted that number (8.62) to ounces (138 oz).
Converting cm to in ... 1 cm = .3937 in
51.4 cm x .3937 in/cm = 20.2 in

#2
The question is asking: If a runner runs 100m in 9.74s, how fast can he/she run 100 yds ?
First convert 100 yards to meters ...
100 yds x .9144 m/yd = 91.44 m
So ... if a runner can run 100m in 9.74s, how long will it take the same runner to run 91.44m (100 yds) ?
Set up a ratio and solve for x.
100m /9.74s = 91.44m/x s
100x = 890.62
x = 8.906 = 8.91s
Looks like I agree with you, lol !!
Even if you look at it another way ...
100m in 9.74s = 10.266 m/s
91.44m x 1 sec/10.266m = 8.907s
(I think we're right and your online source is wrong, lol).

#3

First I calculated the area of the room (in ft^3) then I converted that to m^3 (cubic meters)
(18)(12)(8) = 1728 ft^3
1 m^3 = 35.314 ft^3
1728 ft^3 x 1 m^3/35.314 ft^3 = 48.93 m^3
The alarm sounds when the air composition reaches 400,000 micrograms/m^3 = .0004g/m^3
Multiply the area of the room in cubic meters by the alarm rate in g/m^3
48.93 m^3 x .0004 g/m^3 = .019572 g/m^3 = 19,572 micrograms

See how that matches up with other answers - good luck !!

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How much carbon monoxide is deathly? How much does a gas heater produce in ppm?

carbon monoxide detector 400 ppm image

Q.

Answer
Concentration Symptoms
35 ppm (0.0035%) Headache and dizziness within six to eight hours of constant exposure
100 ppm (0.01%) Slight headache in two to three hours
200 ppm (0.02%) Slight headache within two to three hours; loss of judgment
400 ppm (0.04%) Frontal headache within one to two hours
800 ppm (0.08%) Dizziness, nausea, and convulsions within 45 min; insensible within 2 hours
1,600 ppm (0.16%) Headache, tachycardia, dizziness, and nausea within 20 min; death in less than 2 hours
3,200 ppm (0.32%) Headache, dizziness and nausea in five to ten minutes. Death within 30 minutes.
6,400 ppm (0.64%) Headache and dizziness in one to two minutes. Convulsions, respiratory arrest, and death in less than 20 minutes.
12,800 ppm (1.28%) Unconsciousness after 2-3 breaths. Death in less than three minutes.

How much your gas heater produces would have to be measured.
If you are running a gas heater or any appliance that uses fossil fuel, you should have a co detector.

carbon monoxide detector keeps beeping?

KillingMot

I have two carbon monoxide detector. My upstair carbon monoxide detector keeps beeping every 2-4 minutes. It also has a number saying 52. The carbon monoxide downstair appears to be fine, althrough it doesnt have that displaying number thing. I tried switching the carbon monoxide with each other, and now neither beeps anymore. But one of the carbon monoxide detetor(the one from upstair then switch to downstair) still says 52. Should i be concern?

Answer
Although all home detectors use an audible alarm signal as the primary indicator, some versions also offer a digital readout of the CO concentration, in parts per million. Typically, they can display both the current reading and a peak reading from memory of the highest level measured over a period of time. These advanced models cost somewhat more but are otherwise similar to the basic models.

The digital models offer the advantage of being able to observe levels that are below the alarm threshold, learn about levels that may have occurred during an absence, and assess the degree of hazard if the alarm sounds. They may also aid emergency responders in evaluating the level of past or ongoing exposure or danger.

The alarm points on carbon monoxide detectors are not a simple alarm level as in smoke detectors but are a concentration-time function. At lower concentrations (eg 100 parts per million) the detector will not sound an alarm for many tens of minutes. At 400 parts per million (PPM), the alarm will sound within a few minutes. This concentration-time function is intended to mimic the uptake of carbon monoxide in the body while also preventing false alarms due to relatively common sources of carbon monoxide such as cigarette smoke.

CONCLUSION: YOU ARE SAFE AT 52.

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what is a safe level of carbon monoxide?

carbon monoxide detector 400 ppm image

kalashniko

i bought a new digital carbon monoxide detector...it has readings up to 400( not sure what the units of measurement are) it records a week's worth of c0 levels...i had it for a couple of days and decided to check it and it said the highest reading of c0 so far was 131....but it didnt go off....so im assuming that that is still a safe/inhabitable area.....the question is....what is a dangerous level of c0 and who do i call to service my gasboiler/ gas heater cause those are the only things in my house that are powered by gas....do i call my gas guy? or my heating/cooling guy? thanks in advance

Answer
Carbon monoxide is measured in parts per million (ppm). Any CO levels higher than 10-20 should be alarming. Especially inside of a residence. If it recorded a CO level of 131 and didn't alarm, then you might want to look into getting a new detector. If you were home at the time the level was 131, you would be dead within a few hours. The signs/symptoms of acute (new onset) CO poisoning start out as headache, reddening of face, dizziness, and progress to nausea, vomiting, trouble walking and soon thereafter, unconsciousness and death. So yes, get a hold of a professional about your furnace, washer/dryer, or whatever your think the CO source may be. Hope this helps.

AP Chemistry homework help!!?

Faith

OK, so I did several problems, but there are slight differences when comparing my answers to the book answers. Can someone please find the mistakes.

1. A baby was born who weighs 3.91 kg and measures 51.4 cm. Convert the weight to pounds and ounces and her length to inches.

My answer: 8.62 lbs, 138 oz, and 20.2 in.
Book answer: 8lbs, 9.9oz, and 20.5 in.

2. The world record for the hundred meter dash is 9.74s. At this speed, how long would it take to run 1.00 x 10^2 yards?

My answer: 8.91 sec
I don't have the book answer for this problem, but an online answer states that it is 8.85 sec (100/11.3) where did the 11.3 come from?

Carbon Monoxide (CO) detectors sound an alarm when peak levels of carbon monoxide reach 100 parts per million(ppm). This level roughly corresponds to a composition of air that contains 400,000 micro grams carbon monoxide per cubic meter of air. Assuming the dimensions of a room at 18ft x 12ft x 8ft, estimate the mass of carbon monoxide in the room that would register 100ppm on a carbon monoxide detector.

My answer : 1.98 x 10^7 ug
Is my answer correct? If so, does that mean I complete ignore the 100 ppm when doing calculations?

Thank you!

Answer
1
As far as question 1 is concerned, I think you misunderstood what they were asking. The question wants you to take the weight in kg and convert it to a COMBINATION of pounds and ounces. In other words, they want the pounds as a whole number - and the fractional portion (.62) in ounces.
You converted kg to lb correctly 3.91 kg = 8.62 lbs ... or 8 lbs and (.62) x 16oz/lb = 9.92 oz. Instead, you gave the answer as a decimal and then converted that number (8.62) to ounces (138 oz).
Converting cm to in ... 1 cm = .3937 in
51.4 cm x .3937 in/cm = 20.2 in

#2
The question is asking: If a runner runs 100m in 9.74s, how fast can he/she run 100 yds ?
First convert 100 yards to meters ...
100 yds x .9144 m/yd = 91.44 m
So ... if a runner can run 100m in 9.74s, how long will it take the same runner to run 91.44m (100 yds) ?
Set up a ratio and solve for x.
100m /9.74s = 91.44m/x s
100x = 890.62
x = 8.906 = 8.91s
Looks like I agree with you, lol !!
Even if you look at it another way ...
100m in 9.74s = 10.266 m/s
91.44m x 1 sec/10.266m = 8.907s
(I think we're right and your online source is wrong, lol).

#3

First I calculated the area of the room (in ft^3) then I converted that to m^3 (cubic meters)
(18)(12)(8) = 1728 ft^3
1 m^3 = 35.314 ft^3
1728 ft^3 x 1 m^3/35.314 ft^3 = 48.93 m^3
The alarm sounds when the air composition reaches 400,000 micrograms/m^3 = .0004g/m^3
Multiply the area of the room in cubic meters by the alarm rate in g/m^3
48.93 m^3 x .0004 g/m^3 = .019572 g/m^3 = 19,572 micrograms

See how that matches up with other answers - good luck !!

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what is the best gadget or technology that is made which is related to chemistry?

carbon monoxide detector 400 ppm image

Chua

please help me...

i need it for my report..

.
.
.i need the gadgets whoch are really rare...

Answer
CO (poison) detectors - should be in every house in case furnace has issues

Sensors

Early designs were basically a white pad which would fade to a brownish or blackish colour if carbon monoxide were present. Such chemical detectors are cheap and widely available, but only give a visual warning of a problem. As carbon monoxide related deaths increased during the 1990s, audible alarms became standard.
The alarm points on carbon monoxide detectors are not a simple alarm level (as in smoke detectors) but are a concentration-time function. At lower concentrations (eg 100 parts per million) the detector will not sound an alarm for many tens of minutes. At 400 parts per million (PPM), the alarm will sound within a few minutes. This concentration-time function is intended to mimic the uptake of carbon monoxide in the body while also preventing false alarms due to relatively common sources of carbon monoxide such as cigarette smoke.
There are four types of sensors available and they vary in cost, accuracy and speed of response.[10] The latter three types include sensor elements that typically last up to 10 years. At least one CO detector is available which includes a battery and sensor in a replaceable module. Most CO detectors do not have replaceable sensors.
[edit]Opto-Chemical
The detector consists of a pad of a coloured chemical which changes colour upon reaction with carbon monoxide. They only provide a qualitative warning of the gas however. The main advantage of these detectors is that they are the lowest cost, but the downside is that they also offer the lowest level of protection.
[edit]Biomimetic
A biomimetic (chem-optical or gel cell) sensor works with a form of synthetic hemoglobin which darkens in the presence of CO, and lightens without it. This can either be seen directly or connected to a light sensor and alarm. Battery lifespan usually lasts 2-3 years. Device lasts on the average of about 10 years. These products were the first to enter the mass market but have now largely fallen out of favour.
[edit]Electrochemical
This is a type of fuel cell that instead of being designed to produce power, is designed to produce a current that is precisely related to the amount of the target gas (in this case carbon monoxide) in the atmosphere. Measurement of the current gives a measure of the concentration of carbon monoxide in the atmosphere. Essentially the electrochemical cell consists of a container, 2 electrodes, connection wires and an electrolyte - typically sulfuric acid. Carbon monoxide is oxidized at one electrode to carbon dioxide while oxygen is consumed at the other electrode. For carbon monoxide detection, the electrochemical cell has advantages over other technologies in that it has a highly accurate and linear output to carbon monoxide concentration, requires minimal power as it is operated at room temperature, and has a long lifetime (typically commercial available cells now have lifetimes of 5 years or greater). Until recently, the cost of these cells and concerns about their long term reliability had limited uptake of this technology in the marketplace, although these concerns are now largely overcome. This technology is now the dominant technology in USA and Europe.
[edit]Semiconductor
Thin wires of the semiconductor tin dioxide on an insulating ceramic base provide a sensor monitored by an integrated circuit. This sensing element needs to be heated to approximately 400 deg C in order to operate. Oxygen increases resistance of the tin dioxide, but carbon monoxide reduces resistance therefore by measurement of the resistance of the sensing element means a monitor can be made to trigger an alarm. The power demands of this sensor means that these devices can only be mains powered although a pulsed sensor is now available that has a limited lifetime (months) as a battery powered detector. Device usually lasts on the average of 5-10 years. This technology has traditionally found high utility in Japan and the far east with some market penetration in USA. However the superior performance of electrochemical cell technology is beginning to displace this technology

Chemistry conversion question?

Angela L

Carbon Monoxide (CO) detectors sound an alarm when peak levels of carbon monoxide reach 100 parts per million(ppm). This level roughly corresponds to a composition of air that contains 400,000 micro grams carbon monoxide per cubic meter of air. Assuming the dimensions of a room at 18ft x 12ft x 8ft, estimate the mass of carbon monoxide in the room that would register 100ppm on a carbon monoxide detector.

help me please :)

Answer
convert ft to meters then multiply to get m3 then x 400,000micrograms

http://www.kentchemistry.com/links/Measurements/dimensionalanalysis.htm

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can carbon monoxide detectors detect small amounts?

carbon monoxide detector 400 ppm image

mEl

i have an older furnace and i have a detector but i was wondering if the detectors detect small trace amounts of cm or only the major leaks.

Answer
Basically there are 3 levels that should activate the alarm 70 ppm, 150 ppm and 400 ppm depending upon how long the levels are detected.

I am a home inspector. I check CO as part of my inspection. Most furnaces and water heaters operating in normal conditions will have less than 20 parts per million in the flue stack (after the vent diverter). So 70 ppm CO is a pretty high level.

Kitchen ranges often exceed 400 parts per million on startup.

Ceramic log sets usually peg the meter at 2000 ppm.

From 1st Alert one of the leading manufacturers of home alarms:

<< WHAT LEVELS OF CO CAUSE AN ALARM?
Underwriters Laboratories Inc. Standard UL2034 requires residential CO
Alarms to sound when exposed to levels of CO and exposure times as
described below. They are measured in parts per million (ppm) of CO over
time (in minutes).
UL2034 Required Alarm Points*:
⢠If the alarm is exposed to 400 ppm of CO, IT MUST ALARM BETWEEN
4 and 15 MINUTES.
⢠If the alarm is exposed to 150 ppm of CO, IT MUST ALARM BETWEEN
10 and 50 MINUTES.
⢠If the alarm is exposed to 70 ppm of CO, IT MUST ALARM BETWEEN
60 and 240 MINUTES.
* Approximately 10% COHb exposure of 10% to 95% Relative
Humidity (RH).

The unit is designed not to alarm when exposed to a constant level
of 30 ppm for 30 days.

CO Alarms are designed to alarm before there is an immediate life threat.
Since you cannot see or smell CO, never assume itâs not present.
⢠An exposure to 100 ppm of CO for 20 minutes may not affect average,
healthy adults, but after 4 hours the same level may cause headaches.
⢠An exposure to 400 ppm of CO may cause headaches in average, healthy
adults after 35 minutes, but can cause death after 2 hours. >>

How much carbon monoxide is deathly? How much does a gas heater produce in ppm?

Q.

Answer
Concentration Symptoms
35 ppm (0.0035%) Headache and dizziness within six to eight hours of constant exposure
100 ppm (0.01%) Slight headache in two to three hours
200 ppm (0.02%) Slight headache within two to three hours; loss of judgment
400 ppm (0.04%) Frontal headache within one to two hours
800 ppm (0.08%) Dizziness, nausea, and convulsions within 45 min; insensible within 2 hours
1,600 ppm (0.16%) Headache, tachycardia, dizziness, and nausea within 20 min; death in less than 2 hours
3,200 ppm (0.32%) Headache, dizziness and nausea in five to ten minutes. Death within 30 minutes.
6,400 ppm (0.64%) Headache and dizziness in one to two minutes. Convulsions, respiratory arrest, and death in less than 20 minutes.
12,800 ppm (1.28%) Unconsciousness after 2-3 breaths. Death in less than three minutes.

How much your gas heater produces would have to be measured.
If you are running a gas heater or any appliance that uses fossil fuel, you should have a co detector.

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