% abundance?
Q. Uranium has an atomic mass equal to 238.0289. It consists of two isotopes: uranuim-235 with an isotopic mass of 235.44 amu and uranium-238 with an isotopic mass of 238.51. How do i calculate the % abundance of the uranium-235 isotope? I need to know how to do the actual proceedure. If you could just show me how to get it that would be great! thanks!
Asked by CJ - Wed Jun 11 08:30:10 2008 - - 1 Answers - 0 Comments
A. Let x = % abundane Uranium -235 the % abundance of Uranium -238 will be 100 -x 238.0289 = x ( 235.44) + ( 100-x ) 238.51 / 100 23802.89 = x ( 235.44) + 23851 - x(238.51) 48.11 = 3.07 x x = 15.67 % => U-235 % U -238 = 100 - 15.67 =84.33
Answered by Dr.A - Wed Jun 11 08:43:52 2008
Q. Uranium has an atomic mass equal to 238.0289. It consists of two isotopes: uranuim-235 with an isotopic mass of 235.44 amu and uranium-238 with an isotopic mass of 238.51. How do i calculate the % abundance of the uranium-235 isotope? I need to know how to do the actual proceedure. If you could just show me how to get it that would be great! thanks!
Asked by CJ - Wed Jun 11 08:30:10 2008 - - 1 Answers - 0 Comments
A. Let x = % abundane Uranium -235 the % abundance of Uranium -238 will be 100 -x 238.0289 = x ( 235.44) + ( 100-x ) 238.51 / 100 23802.89 = x ( 235.44) + 23851 - x(238.51) 48.11 = 3.07 x x = 15.67 % => U-235 % U -238 = 100 - 15.67 =84.33
Answered by Dr.A - Wed Jun 11 08:43:52 2008
How to find the natural abundance of antimony 121 and 123?
Q. You are given the mass of antimony 121 as 120.904 and 123 as 122.904 and we are supposed to find the natural abundance percentage by using the periodic table value of antimony(121.760)
Asked by sean l - Wed Jan 20 00:50:40 2010 - - 2 Answers - 0 Comments
A. The value on the periodic table is the abundance of each mass multiplied by that mass. So figuring that there has to be a total of 100% abundance, you have x% of one, and 100%-x% of the other. YOur equation is then %A*m1 + (1-%B)*m2 = Mass on table A*120.904 + (1-A)*122.904 = 121.76 120.904A + 122.904 - 122.904A = 121.76 -2A = -1.144 A = 0.572 So Sb121 has 57.2% abundance, Sb123 has (1-0.572) = 0.428 = 42.8% abundance
Answered by unknown - Wed Jan 20 01:01:55 2010
Q. You are given the mass of antimony 121 as 120.904 and 123 as 122.904 and we are supposed to find the natural abundance percentage by using the periodic table value of antimony(121.760)
Asked by sean l - Wed Jan 20 00:50:40 2010 - - 2 Answers - 0 Comments
A. The value on the periodic table is the abundance of each mass multiplied by that mass. So figuring that there has to be a total of 100% abundance, you have x% of one, and 100%-x% of the other. YOur equation is then %A*m1 + (1-%B)*m2 = Mass on table A*120.904 + (1-A)*122.904 = 121.76 120.904A + 122.904 - 122.904A = 121.76 -2A = -1.144 A = 0.572 So Sb121 has 57.2% abundance, Sb123 has (1-0.572) = 0.428 = 42.8% abundance
Answered by unknown - Wed Jan 20 01:01:55 2010
How do you calculate the percent abundance of each copper istotope?
Q. Copper (atomic mass 63.5) occurs in nature in the form of two isotopes, Cu-63 and Cu-65. Calculate the percent abundance of each copper isotope.
Asked by Cause - Sun Sep 14 19:27:30 2008 - - 1 Answers - 0 Comments
A. (63) (x) + (65) (1 - x) = 63.5 it means x+(1-x ) =1 is the 2 percentages in decimal form adding up to 1 or %100 63x+65-65x=63.5 copper-63 =75% -2x = -1.5 copper-65= 25% x=0.75 (1-x) = 0.25
Answered by jay p - Sun Sep 14 19:49:49 2008
Q. Copper (atomic mass 63.5) occurs in nature in the form of two isotopes, Cu-63 and Cu-65. Calculate the percent abundance of each copper isotope.
Asked by Cause - Sun Sep 14 19:27:30 2008 - - 1 Answers - 0 Comments
A. (63) (x) + (65) (1 - x) = 63.5 it means x+(1-x ) =1 is the 2 percentages in decimal form adding up to 1 or %100 63x+65-65x=63.5 copper-63 =75% -2x = -1.5 copper-65= 25% x=0.75 (1-x) = 0.25
Answered by jay p - Sun Sep 14 19:49:49 2008
What is the relative abundance of the lighter isotope?
Q. the bigger part: if the mass of the only 2 isotopes of an element are 126.6331u and 129.1386u and the weighted average mass is 127.3321u , what is the relative abundance of the lighter isotope? please, i need the answer tonight! please help me. i'm really confused. Thank You So Much.
Asked by unknown - Wed Aug 5 01:32:30 2009 - - 1 Answers - 0 Comments
A. Hi Marielle: Let x be the fraction of the lighter isotope then 126.6331x is the contribution the light isotope makes to the overall atomic weight. The remaining fraction (1-x) therefore contributes 129.1386(1-x) to the atomic weight which we are given = 127.3321 So 126.6331x + 129.1386(1-x) = 127.3371 From which x = 1.8065/2.5055 = 0.721014 or 72.1014% (we're 1 sig short but ...) cheers, drp
Answered by sjbiis - Wed Aug 5 01:47:03 2009
Q. the bigger part: if the mass of the only 2 isotopes of an element are 126.6331u and 129.1386u and the weighted average mass is 127.3321u , what is the relative abundance of the lighter isotope? please, i need the answer tonight! please help me. i'm really confused. Thank You So Much.
Asked by unknown - Wed Aug 5 01:32:30 2009 - - 1 Answers - 0 Comments
A. Hi Marielle: Let x be the fraction of the lighter isotope then 126.6331x is the contribution the light isotope makes to the overall atomic weight. The remaining fraction (1-x) therefore contributes 129.1386(1-x) to the atomic weight which we are given = 127.3321 So 126.6331x + 129.1386(1-x) = 127.3371 From which x = 1.8065/2.5055 = 0.721014 or 72.1014% (we're 1 sig short but ...) cheers, drp
Answered by sjbiis - Wed Aug 5 01:47:03 2009
How to find percent abundance of 2 isotopes of an element?
Q. I am given two isotopes of the same element, I am given the atomic weight and mass number of each isotope. How would I find the percent of abundance for each isotope?
Asked by Brian - Wed Sep 17 15:54:02 2008 - - 1 Answers - 1 Comments
A. If you know the element, look up the atomic mass on the periodic table. It's the number with places after the decimal. If there are only two isotopes they have to add up to 100% (or in decimal form 1) so you set it up like this: (atomic weight of one isotope)(x) + (atomic weight of other isotope)(1-x) = the atomic mass you find on the table. Use algebra to find x. Don't forget to use the distributive property. Example: Cl-35 weighs 34.969 amu Cl-37 weighs 36.966 amu (34.969)(x) + (36.966)(1-x) = 35.453 (on the table for Chlorine) 34.969 x + 36.966 - 36.966 x = 35.453 -1.997 x = -1.513 x = 0.75764 so Cl-35 abundance is 75.764% and Cl-37 is 24.236 %
Answered by Jeannie Physics Teacher - Thu Sep 18 11:29:36 2008
Q. I am given two isotopes of the same element, I am given the atomic weight and mass number of each isotope. How would I find the percent of abundance for each isotope?
Asked by Brian - Wed Sep 17 15:54:02 2008 - - 1 Answers - 1 Comments
A. If you know the element, look up the atomic mass on the periodic table. It's the number with places after the decimal. If there are only two isotopes they have to add up to 100% (or in decimal form 1) so you set it up like this: (atomic weight of one isotope)(x) + (atomic weight of other isotope)(1-x) = the atomic mass you find on the table. Use algebra to find x. Don't forget to use the distributive property. Example: Cl-35 weighs 34.969 amu Cl-37 weighs 36.966 amu (34.969)(x) + (36.966)(1-x) = 35.453 (on the table for Chlorine) 34.969 x + 36.966 - 36.966 x = 35.453 -1.997 x = -1.513 x = 0.75764 so Cl-35 abundance is 75.764% and Cl-37 is 24.236 %
Answered by Jeannie Physics Teacher - Thu Sep 18 11:29:36 2008
What is the abundance of carbon given the following?
Q. Given the following information, determine the average atomic mass for carbon. The abundance of carbon-12 is 98.90% with a mass of 12.000 amu. The abundance of carbon-13 is 1.10% with a mass of 13.003 amu.
Asked by Irene C - Mon Aug 10 02:14:57 2009 - - 1 Answers - 0 Comments
A. 12.01
Answered by Funktapus - Mon Aug 10 02:18:47 2009
Q. Given the following information, determine the average atomic mass for carbon. The abundance of carbon-12 is 98.90% with a mass of 12.000 amu. The abundance of carbon-13 is 1.10% with a mass of 13.003 amu.
Asked by Irene C - Mon Aug 10 02:14:57 2009 - - 1 Answers - 0 Comments
A. 12.01
Answered by Funktapus - Mon Aug 10 02:18:47 2009
Why do some countries have an abundance of wealth and riches while others have remained poor ?
Q. Why do some countries have an abundance of wealth and riches while others have remained poor for most of their history?
Asked by LOST - Mon Feb 2 20:16:51 2009 - - 3 Answers - 0 Comments
A. All countries have been poor by today's standards for most of their history and only in the last 100 years or so have any been rich. Countries got rich because they industrialized which make workers more productive and the poor countries have not industrialized yet but many previously poor countries are doing so now and their economies growing rapidly and soon will be rich. One of the things that is still holding some countries back is their population is growing faster than their economy and they are caught in what economist call the Malthusian Trap. Some economist think that the reason it took so long for the Industrial revolution to happen is because Europe was also until the black death reduce the population by 1/3,
Answered by meg - Mon Feb 2 20:52:13 2009
Q. Why do some countries have an abundance of wealth and riches while others have remained poor for most of their history?
Asked by LOST - Mon Feb 2 20:16:51 2009 - - 3 Answers - 0 Comments
A. All countries have been poor by today's standards for most of their history and only in the last 100 years or so have any been rich. Countries got rich because they industrialized which make workers more productive and the poor countries have not industrialized yet but many previously poor countries are doing so now and their economies growing rapidly and soon will be rich. One of the things that is still holding some countries back is their population is growing faster than their economy and they are caught in what economist call the Malthusian Trap. Some economist think that the reason it took so long for the Industrial revolution to happen is because Europe was also until the black death reduce the population by 1/3,
Answered by meg - Mon Feb 2 20:52:13 2009
How do you find out the fractional abundance of an isotope?
Q. For instance: Chlorine has two naturally occurring isotopes, chlorine-35 (isotopic mass 34.9689 amu) and chlorine-37 (isotopic mass 36.9659 amu). If chlorine has an atomic mass of 35.4527 amu, what is the percent abundance of each isotope? How would I work this problem?
Asked by flyercam2 - Mon Aug 21 21:39:51 2006 - - 1 Answers - 2 Comments
A. To find the percent abundance of each isotope of chlorine proceed as follows: Let x = fraction of Cl-35 then fraction of Cl-37 must be 1-x so 34.9689x + (36.9659)(1-x) = 35.4527 and solve for x. I hope this helps.
Answered by Auriga - Mon Aug 21 21:50:22 2006
Q. For instance: Chlorine has two naturally occurring isotopes, chlorine-35 (isotopic mass 34.9689 amu) and chlorine-37 (isotopic mass 36.9659 amu). If chlorine has an atomic mass of 35.4527 amu, what is the percent abundance of each isotope? How would I work this problem?
Asked by flyercam2 - Mon Aug 21 21:39:51 2006 - - 1 Answers - 2 Comments
A. To find the percent abundance of each isotope of chlorine proceed as follows: Let x = fraction of Cl-35 then fraction of Cl-37 must be 1-x so 34.9689x + (36.9659)(1-x) = 35.4527 and solve for x. I hope this helps.
Answered by Auriga - Mon Aug 21 21:50:22 2006
How do you work out the Relative Abundance of an atom?
Q. Here is the question: A carbon sample is found to contain two isotopes with relative isotopic masses of 12.00 and 13.00. If the relative atomic mass is 12.01 find the relative abundance. I know how to find the relative abundance but theres two unknown values so how do I do it???
Asked by Jay - Sat Feb 13 18:28:09 2010 - - 1 Answers - 0 Comments
A. Sounds like a really easy problem actually. x * 12.00 + y * 13.00 = (x+y) * 12.01 = x * 12.01 + y * 12.01 y * 0.99 = x * 0.01 y * 99 = x so that would mean 99 parts with isotope Carbon-12, and 1 part with isotope Carbon-13.
Answered by Texas - Sat Feb 13 18:35:59 2010
Q. Here is the question: A carbon sample is found to contain two isotopes with relative isotopic masses of 12.00 and 13.00. If the relative atomic mass is 12.01 find the relative abundance. I know how to find the relative abundance but theres two unknown values so how do I do it???
Asked by Jay - Sat Feb 13 18:28:09 2010 - - 1 Answers - 0 Comments
A. Sounds like a really easy problem actually. x * 12.00 + y * 13.00 = (x+y) * 12.01 = x * 12.01 + y * 12.01 y * 0.99 = x * 0.01 y * 99 = x so that would mean 99 parts with isotope Carbon-12, and 1 part with isotope Carbon-13.
Answered by Texas - Sat Feb 13 18:35:59 2010
What is the difference between speaking form out of the abundance of the heart, before you are born again?
Q. What should be the abundance of my heart be now, being born again born of the Spirit and in Christ, sinfulness or righteousness? Do i see the natural man who was made a sinner through Adam's disobedience or do i see a man who was created in Christ created in righteousness, and true holiness? Don't say anything of what You are trying to do through your faith, but share what God said He has done through the faith of Christ in you.
Asked by edwah zephaniah - Fri Oct 2 16:17:54 2009 - - 4 Answers - 0 Comments
A. Dear Ed. Zeph., good afternoon! Since English is not my native language, I did not get very well your question but it raised my interest. As a born again person, filled with the Spirit of God, the abundance of my heart should be righteousness: "that we should serve in newness of spirit"... (1) But, as the apostle Paul wrote: "For the good that I would I do not: but the evil which I would not, that I do." (2) There is a war inside of me, but as I struggle, with my eyes focused in Christ, I'm sure that with His help, with His faith in me I'll continue walking towards Him, resembling Him (just a little, tiny bit) more and more each day. "All that the Father giveth me shall come to me; and him that cometh to me I will in no wise cast… [cont.]
Answered by Vovo (Grandma) - Fri Oct 2 16:56:18 2009
Q. What should be the abundance of my heart be now, being born again born of the Spirit and in Christ, sinfulness or righteousness? Do i see the natural man who was made a sinner through Adam's disobedience or do i see a man who was created in Christ created in righteousness, and true holiness? Don't say anything of what You are trying to do through your faith, but share what God said He has done through the faith of Christ in you.
Asked by edwah zephaniah - Fri Oct 2 16:17:54 2009 - - 4 Answers - 0 Comments
A. Dear Ed. Zeph., good afternoon! Since English is not my native language, I did not get very well your question but it raised my interest. As a born again person, filled with the Spirit of God, the abundance of my heart should be righteousness: "that we should serve in newness of spirit"... (1) But, as the apostle Paul wrote: "For the good that I would I do not: but the evil which I would not, that I do." (2) There is a war inside of me, but as I struggle, with my eyes focused in Christ, I'm sure that with His help, with His faith in me I'll continue walking towards Him, resembling Him (just a little, tiny bit) more and more each day. "All that the Father giveth me shall come to me; and him that cometh to me I will in no wise cast… [cont.]
Answered by Vovo (Grandma) - Fri Oct 2 16:56:18 2009
how to calculate the percent abundance of isotopes?
Q. in particular: copper is listed on the periodic table as having a relative atomic mass of 63.55. Reference books indicate two isotopes of copper, with relative masses of 62.93 and 64.93. Find the percent abundance of each isotope.
Asked by Jade - Mon Nov 2 16:39:55 2009 - - 1 Answers - 0 Comments
A. If x is the fraction of 63-Cu, then (1-x) is the fraction of 65-Cu. There are two isotopes and their total abundance must be 1. Then 63.55 = 62.93x +(1-x)64.93 = 62.93x + 64.93 - 64.93x = 64.93 - 2x 2x = 64.93 - 63.55 = 1.38 so x = 0.69 63-Cu is 69% and 65-Cu is 31%
Answered by James - Mon Nov 2 16:48:32 2009
Q. in particular: copper is listed on the periodic table as having a relative atomic mass of 63.55. Reference books indicate two isotopes of copper, with relative masses of 62.93 and 64.93. Find the percent abundance of each isotope.
Asked by Jade - Mon Nov 2 16:39:55 2009 - - 1 Answers - 0 Comments
A. If x is the fraction of 63-Cu, then (1-x) is the fraction of 65-Cu. There are two isotopes and their total abundance must be 1. Then 63.55 = 62.93x +(1-x)64.93 = 62.93x + 64.93 - 64.93x = 64.93 - 2x 2x = 64.93 - 63.55 = 1.38 so x = 0.69 63-Cu is 69% and 65-Cu is 31%
Answered by James - Mon Nov 2 16:48:32 2009
Using Atomic mass and percent abundance, how do I determine which element this is?
Q. I'm given three sets of information, the atomic mass and perecnt abundance, for three different naturally occuring isotopes of an unknown element. How do I determine which element it is?
Asked by canadienne - Tue Oct 7 00:59:17 2008 - - 2 Answers - 0 Comments
A. canadien, You take the weighted average of all the isotopic masses for the element. For example, say the element has three isotopes, with the respective fractions of each isotope being F1, F2, and F3 (note -- I said fraction, not percent -- the fraction is the percent divided by 100, so that F1 + F2 + F3 = 1). Then, take the isotopic mass of each isotope, say they are M1, M2, and M3. Take each isotopic mass, multiply it by its fractional abundance, and add them all up: Atomic weight = F1M1 + F2M2 + F3M3 + ... That's all there is to it! Hope that helps!
Answered by Dr. Buzz - Tue Oct 7 01:07:21 2008
Q. I'm given three sets of information, the atomic mass and perecnt abundance, for three different naturally occuring isotopes of an unknown element. How do I determine which element it is?
Asked by canadienne - Tue Oct 7 00:59:17 2008 - - 2 Answers - 0 Comments
A. canadien, You take the weighted average of all the isotopic masses for the element. For example, say the element has three isotopes, with the respective fractions of each isotope being F1, F2, and F3 (note -- I said fraction, not percent -- the fraction is the percent divided by 100, so that F1 + F2 + F3 = 1). Then, take the isotopic mass of each isotope, say they are M1, M2, and M3. Take each isotopic mass, multiply it by its fractional abundance, and add them all up: Atomic weight = F1M1 + F2M2 + F3M3 + ... That's all there is to it! Hope that helps!
Answered by Dr. Buzz - Tue Oct 7 01:07:21 2008
Can we actually tune into abundance or do we need to acquire it through hard work?
Q. If so how are you fine-tuning your thoughts and awareness of abundance?
Asked by kickinupfunf - Wed Sep 12 20:08:31 2007 - - 8 Answers - 0 Comments
A. Yes, it is possible. By choosing your thoughts carefully. From what I know, hardwork doesn't necessarily result to abundance. Four scenarios you may choose: (1) life of hardwork and toil while being poor, (2) hardwork and toil while being rich, (3) lazy and relaxed life while being poor, and (4) lazy and relaxed life while being rich. Which one? Whichever you choose, the secret there is to preceed all your words with actions. If you choose the fourth scenario, then be lazy and relaxed and be rich. Act and think like it is already happening and don't ever doubt. The universe will produce the reality for you. Many will attest to the effectivity of this. All of us are already creating the reality that which we believe. Whenever we believe… [cont.]
Answered by silvernivia - Wed Sep 12 21:37:56 2007
Q. If so how are you fine-tuning your thoughts and awareness of abundance?
Asked by kickinupfunf - Wed Sep 12 20:08:31 2007 - - 8 Answers - 0 Comments
A. Yes, it is possible. By choosing your thoughts carefully. From what I know, hardwork doesn't necessarily result to abundance. Four scenarios you may choose: (1) life of hardwork and toil while being poor, (2) hardwork and toil while being rich, (3) lazy and relaxed life while being poor, and (4) lazy and relaxed life while being rich. Which one? Whichever you choose, the secret there is to preceed all your words with actions. If you choose the fourth scenario, then be lazy and relaxed and be rich. Act and think like it is already happening and don't ever doubt. The universe will produce the reality for you. Many will attest to the effectivity of this. All of us are already creating the reality that which we believe. Whenever we believe… [cont.]
Answered by silvernivia - Wed Sep 12 21:37:56 2007
How do you find the percent abundance when given the atomic mass?
Q. Specifically in the following problem: The element Boron exists as B-10 and B-11. The atomic mass of B-10 is 10.001 amu and the atomic mass of B-11 is 10.998 amu. If the average atomic mass of a mixed sample is given as 10.81 amu, what is the percent abundance of each isotope? I understand that the equation would be x+y=1, which would be 10.001x+10.998y=10.81 but I'm not sure how to continue. Many thanks!
Asked by FutureDoctor - Wed Oct 7 22:28:36 2009 - - 1 Answers - 0 Comments
A. You need one more piece of information, one of the percentages.
Answered by darkwater d - Wed Oct 7 22:35:28 2009
Q. Specifically in the following problem: The element Boron exists as B-10 and B-11. The atomic mass of B-10 is 10.001 amu and the atomic mass of B-11 is 10.998 amu. If the average atomic mass of a mixed sample is given as 10.81 amu, what is the percent abundance of each isotope? I understand that the equation would be x+y=1, which would be 10.001x+10.998y=10.81 but I'm not sure how to continue. Many thanks!
Asked by FutureDoctor - Wed Oct 7 22:28:36 2009 - - 1 Answers - 0 Comments
A. You need one more piece of information, one of the percentages.
Answered by darkwater d - Wed Oct 7 22:35:28 2009
How do you calculate the relative abundance of an isotope?
Q. There are 3 isotopes of silicon: Silicon 28, Silicon 29 and Silicon 30 The atomic mass of silicon is 28.086 amu. How do you calculate the relative abundance for each??
Asked by Mayday Parade - Tue Nov 24 19:46:26 2009 - - 1 Answers - 0 Comments
Q. There are 3 isotopes of silicon: Silicon 28, Silicon 29 and Silicon 30 The atomic mass of silicon is 28.086 amu. How do you calculate the relative abundance for each??
Asked by Mayday Parade - Tue Nov 24 19:46:26 2009 - - 1 Answers - 0 Comments
What is the best color for abundance and fame corners for Feng Shui?
Q. I live in Australia. We have been reading some books on the subject some have given different colours for abundance and fame. What would happen if you put to much red together? Thanks for your time
Asked by Kaye B - Wed Apr 23 09:27:00 2008 - - 1 Answers - 0 Comments
A. yes, the red is the symbolism of abundance and fame, Red and Yellow was used only by emperor in ancient China, so color of the Forbidden City is red and China's national Flag is also red. and emperor's robe is yellow, officials and civilians was forbided to use yellow. Too much red together symbolize the blood--- violent revolution !
Answered by kevin - Wed Apr 23 10:58:21 2008
Q. I live in Australia. We have been reading some books on the subject some have given different colours for abundance and fame. What would happen if you put to much red together? Thanks for your time
Asked by Kaye B - Wed Apr 23 09:27:00 2008 - - 1 Answers - 0 Comments
A. yes, the red is the symbolism of abundance and fame, Red and Yellow was used only by emperor in ancient China, so color of the Forbidden City is red and China's national Flag is also red. and emperor's robe is yellow, officials and civilians was forbided to use yellow. Too much red together symbolize the blood--- violent revolution !
Answered by kevin - Wed Apr 23 10:58:21 2008
What is the Relative Abundance of Nitrogen?
Q. What is the Relative Abundance of Nitrogen. And where is it found besides air. And how is it Obtained. Im interested in this. And search engines haven't helped me at all. So please tell me! Thank you!
Asked by Sammy - Mon Oct 13 17:30:35 2008 - - 4 Answers - 0 Comments
A. Nitrogen is 79% of the air It is found in all proteins It is put into manmade fertilizers to give nitrogen to plants to make proteins. It is found in the feces of animals and that is used as fertilizer. nitrogen fixing bacteria are able to take it from the air to make it available to plants. They live on the roots of legumes. Sometimes theese crops are plowed under to give the soil the new nitrogen as plants and animals decay, their nitrogen is released into the soil for plants Check the nitrogen cycle to see the different bacteria that help keep nitrogen available Nitrogen may be obtained by fractional distillation of liquid air
Answered by science teacher - Mon Oct 13 22:26:26 2008
Q. What is the Relative Abundance of Nitrogen. And where is it found besides air. And how is it Obtained. Im interested in this. And search engines haven't helped me at all. So please tell me! Thank you!
Asked by Sammy - Mon Oct 13 17:30:35 2008 - - 4 Answers - 0 Comments
A. Nitrogen is 79% of the air It is found in all proteins It is put into manmade fertilizers to give nitrogen to plants to make proteins. It is found in the feces of animals and that is used as fertilizer. nitrogen fixing bacteria are able to take it from the air to make it available to plants. They live on the roots of legumes. Sometimes theese crops are plowed under to give the soil the new nitrogen as plants and animals decay, their nitrogen is released into the soil for plants Check the nitrogen cycle to see the different bacteria that help keep nitrogen available Nitrogen may be obtained by fractional distillation of liquid air
Answered by science teacher - Mon Oct 13 22:26:26 2008
What is the natural abundance of pnicogens (poison metals in the periodic table, group/family 15)?
Q. What is the natural abundance of the following elements in their natural state? Nitrogen Phosphorous Arsenic Antimony Bismuth Also, what is the trend of reactivity (if possible, you don't have to answer this)
Asked by Stephen - Wed Oct 22 20:42:21 2008 - - 1 Answers - 0 Comments
A. N: 99.6999% as 14N, 0.366% as 15N P: 100% as 31P As: 100% as 75As Sb: 57.36% as 121Sb, 42.64% as 123Sb Bi: 100% as 209Bi Based on periodic trends, the reactivity of N should be highest and that of Bi the lowest (based on ionization energy and electronegativity). All the pnicogens bond quite tightly to other elements (they make good double and triple covalent bonds).
Answered by flan318 - Wed Oct 22 21:10:40 2008
Q. What is the natural abundance of the following elements in their natural state? Nitrogen Phosphorous Arsenic Antimony Bismuth Also, what is the trend of reactivity (if possible, you don't have to answer this)
Asked by Stephen - Wed Oct 22 20:42:21 2008 - - 1 Answers - 0 Comments
A. N: 99.6999% as 14N, 0.366% as 15N P: 100% as 31P As: 100% as 75As Sb: 57.36% as 121Sb, 42.64% as 123Sb Bi: 100% as 209Bi Based on periodic trends, the reactivity of N should be highest and that of Bi the lowest (based on ionization energy and electronegativity). All the pnicogens bond quite tightly to other elements (they make good double and triple covalent bonds).
Answered by flan318 - Wed Oct 22 21:10:40 2008
How to calculate the abundance of strontium isotopes?
Q. Calculate the abundance of the isotopes and the atomic weight or Sr given that (Sr-87)/(Sr-86) = 2.5, (Sr-86)/(Sr-88) = 0.1194, (Sr-84)/(Sr-86) = 0.056584. The masses of the isotopes are Sr-88 = 87.9056 amu, Sr-87 = 86.9088 amu, Sr-86 = 85.9092 amu, and Sr-84 = 83.9134 amu.
Asked by Luke - Sun Oct 18 20:00:27 2009 - - 1 Answers - 0 Comments
Q. Calculate the abundance of the isotopes and the atomic weight or Sr given that (Sr-87)/(Sr-86) = 2.5, (Sr-86)/(Sr-88) = 0.1194, (Sr-84)/(Sr-86) = 0.056584. The masses of the isotopes are Sr-88 = 87.9056 amu, Sr-87 = 86.9088 amu, Sr-86 = 85.9092 amu, and Sr-84 = 83.9134 amu.
Asked by Luke - Sun Oct 18 20:00:27 2009 - - 1 Answers - 0 Comments
The law of abundance is that everything replicates after its own kind. Who said this?
Q. The law of abundance is that everything replicates after its own kind. Like is attracted to like. If you want more wealth, concentrate of wealth; think thoughts of abundance and wealth. Who said this?
Asked by Oscar C - Thu Aug 6 21:36:49 2009 - - 4 Answers - 0 Comments
A. This quotation is taken from the Delfin Knowledge System.
Answered by titacabreros - Thu Aug 6 21:41:06 2009
Q. The law of abundance is that everything replicates after its own kind. Like is attracted to like. If you want more wealth, concentrate of wealth; think thoughts of abundance and wealth. Who said this?
Asked by Oscar C - Thu Aug 6 21:36:49 2009 - - 4 Answers - 0 Comments
A. This quotation is taken from the Delfin Knowledge System.
Answered by titacabreros - Thu Aug 6 21:41:06 2009
From Yahoo Answer Search: 'abundance'
Sun Mar 7 22:35:55 2010 [ refresh local cache ]
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Redknapp feels there is an abundance of talent in England's lower leagues and believes more managers should be given a chance. "People should give English ...
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Sat, 20 Feb 2010 08:22:24 GM
When people talk of manifesting . abundance. , they are simply acknowledging that thoughts have power. Your thoughts have shaped your life from the moment you came into this world until now. Naturally as a baby, the thoughts you had did not ...
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