Hydrogen Car Kit » Chemistry http://www.hydrogen-car-kit.org Hydrogen Car Kits And Related Products Thu, 09 Feb 2012 09:08:03 +0000 en hourly 1 The conversion factor that is used to change mass to moles is? http://www.hydrogen-car-kit.org/the-conversion-factor-that-is-used-to-change-mass-to-moles-is/ http://www.hydrogen-car-kit.org/the-conversion-factor-that-is-used-to-change-mass-to-moles-is/#comments Sat, 27 Jun 2009 02:46:55 +0000 admin http://www.hydrogen-car-kit.org/%/postname/% hydrogen conversion ]]> http://www.hydrogen-car-kit.org/the-conversion-factor-that-is-used-to-change-mass-to-moles-is/feed/ 0 How to Calculate the Energy Released for an Electron in the Hydrogen Atom? http://www.hydrogen-car-kit.org/how-to-calculate-the-energy-released-for-an-electron-in-the-hydrogen-atom-2/ http://www.hydrogen-car-kit.org/how-to-calculate-the-energy-released-for-an-electron-in-the-hydrogen-atom-2/#comments Tue, 04 Nov 2008 16:05:57 +0000 admin http://www.hydrogen-car-kit.org/%/postname/% Continue reading →]]> hydrogen conversion
habitxo asked:


I’m extremely rusty in chemistry seeing as how I took Chem111 during my freshman year and am now a junior taking Chem112 and am having problems with this problem.

Calculate the energy released for an electron in the hydrogen atom that undergoes a transition from n = 2 to n = 4.

Multiple Choice Answers:
a. 4.09 X 10-19 J
b. 8.39 X 10-20 J
c. 7.46 X 10-32 J
d. 3.29 X 10-18 J
e. 5.39 X 10-21 J

Now, am I doing this right and using the correct formula?

I’m using the formula Ephoton = hv = hRH (1/n^2(low) – 1/n^2(high)) where hRH is 3.290×10^15 s^-1

so I get:
hv=3.290×10^15 s^-1 (1/4 – 1/16)
hv=3.290/0.1875
hv=17.54667
conversion to Joules:
17.54667 x 6.2415×10^18 = 1.095 x 10^20???

It’s all wrong so I threw it up there for someone to pick it apart and show me where I was wrong and if you could kindly show me the correct way, thanks!

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]]> http://www.hydrogen-car-kit.org/how-to-calculate-the-energy-released-for-an-electron-in-the-hydrogen-atom-2/feed/ 1 How many grams of water could be raised from 25 C (room temp) to 100 C (boiling point of H2O) by the amt of? http://www.hydrogen-car-kit.org/how-many-grams-of-water-could-be-raised-from-25-c-room-temp-to-100-c-boiling-point-of-h2o-by-the-amt-of-2/ http://www.hydrogen-car-kit.org/how-many-grams-of-water-could-be-raised-from-25-c-room-temp-to-100-c-boiling-point-of-h2o-by-the-amt-of-2/#comments Thu, 25 Sep 2008 00:13:30 +0000 admin http://www.hydrogen-car-kit.org/%/postname/% Continue reading →]]> Ivory asked:


energy released in the formation of 1 mol H2 from hydrogen atoms? The bond energy of H2 is 435 kJ/mol

The answer is 1400g

But i dont know how they got that. What formula or conversion factor are we sopposed to use. Im so confused. Please help :(

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]]> http://www.hydrogen-car-kit.org/how-many-grams-of-water-could-be-raised-from-25-c-room-temp-to-100-c-boiling-point-of-h2o-by-the-amt-of-2/feed/ 1 Brown Spots in Hydrogen Fuel Cell? http://www.hydrogen-car-kit.org/brown-spots-in-hydrogen-fuel-cell/ http://www.hydrogen-car-kit.org/brown-spots-in-hydrogen-fuel-cell/#comments Sat, 20 Sep 2008 01:02:49 +0000 admin http://www.hydrogen-car-kit.org/%/postname/% hydrogen car kit ]]> http://www.hydrogen-car-kit.org/brown-spots-in-hydrogen-fuel-cell/feed/ 1 Conversion of H2O2 to O2? http://www.hydrogen-car-kit.org/conversion-of-h2o2-to-o2-2/ http://www.hydrogen-car-kit.org/conversion-of-h2o2-to-o2-2/#comments Mon, 21 Jul 2008 23:12:32 +0000 admin http://www.hydrogen-car-kit.org/%/postname/% hydrogen conversion
Mark T asked:




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]]> http://www.hydrogen-car-kit.org/conversion-of-h2o2-to-o2-2/feed/ 2 Chemistry Help! Grams to liters conversion? http://www.hydrogen-car-kit.org/chemistry-help-grams-to-liters-conversion-2/ http://www.hydrogen-car-kit.org/chemistry-help-grams-to-liters-conversion-2/#comments Mon, 21 Jul 2008 11:22:36 +0000 admin http://www.hydrogen-car-kit.org/%/postname/% Continue reading →]]> hydrogen conversion
so there is .7777 grams of hydrogen or h2 or .385 moles. it needs to be converted into liters.
At room temperature and pressure the volume of a mole of any gas is 24 liters.

Please help,

thanks
22.4 is not right

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]]> http://www.hydrogen-car-kit.org/chemistry-help-grams-to-liters-conversion-2/feed/ 1 i hane read that by using j.j thomsan effect if gases are allowed to expand from compressed state then they liquify.LINDS device prectical and demonstrated this effect BUT WHY hydrogen and helium cant be liquify?and do air conditioner also use same phenomenan? http://www.hydrogen-car-kit.org/i-hane-read-that-by-using-jj-thomsan-effect-if-gases-are-allowed-to-expand-from-compressed-state-then-they-liquifylinds-device-prectical-and-demonstrated-this-effect-but-why-hydrogen-and-helium-cant/ http://www.hydrogen-car-kit.org/i-hane-read-that-by-using-jj-thomsan-effect-if-gases-are-allowed-to-expand-from-compressed-state-then-they-liquifylinds-device-prectical-and-demonstrated-this-effect-but-why-hydrogen-and-helium-cant/#comments Thu, 10 Jul 2008 23:12:20 +0000 admin http://www.hydrogen-car-kit.org/%/postname/% hydrogen conversion
joy happy asked:




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]]> http://www.hydrogen-car-kit.org/i-hane-read-that-by-using-jj-thomsan-effect-if-gases-are-allowed-to-expand-from-compressed-state-then-they-liquifylinds-device-prectical-and-demonstrated-this-effect-but-why-hydrogen-and-helium-cant/feed/ 3 Chemistry Question. combustion reactions? http://www.hydrogen-car-kit.org/chemistry-question-combustion-reactions/ http://www.hydrogen-car-kit.org/chemistry-question-combustion-reactions/#comments Thu, 29 May 2008 21:43:57 +0000 admin http://www.hydrogen-car-kit.org/%/postname/% Continue reading →]]> ranadeshaun asked:


A ________ is used to determine the composition of compounds containing the elements ______ and ______.

A) conversion factor; hydrogen; oxygen.
B) combustion apparatus; hydrogen; carbon
C) solvent; carbon; oxygen
D) solvent; hydrogen; carbon
E) combustion apparatus; carbon; oxygen

______________________________________________________

i guess the answer is B… but it might also be E….
i’m not sure…

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habitxo asked:



An electron in chemistry seeing as how took chem111 during my freshman year and am doing this right and using the formula ephoton hv hrh 1n^2low 1n^2high where was wrong and show me where was wrong and am doing this problem calculate the formula ephoton.

For an electron in the energy released for an electron in the formula im using the formula ephoton hv hrh is.

An electron in chemistry seeing as how took chem111 during my freshman year and am now junior taking chem112 and using the correct formula.

For an electron in chemistry seeing as how took chem111 during my freshman year and show me where was wrong and show me where hrh is 3290×10^15 s^1 14 116 hv329001875 hv1754667 conversion to joules 1754667 62415×10^18 1095 10^20.

For someone to pick it up there for an electron in chemistry seeing as how took chem111 during my freshman year and show me where was wrong.


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