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Apr 13 2010 · Anonymous asked in Science Mathematics Chemistry · 1 decade ago very hard chemistry question please help me Your 2009 Ferrari F430 averages 17L / 100km and you drive an average of 12 000 miles per year. May 10 2011 · hey i need help with this practice test im not cheating or anything its just so that i can practice for my test. help me out ) 1) Which statement about the following reaction is correct CH4 (g) 2O2 (g) yields CO2 (g) 2H2O(l) deltaH = -890 kJ a) reacting one mole of oxygen (O2) absorbs 445 kJ of energy b) reacting one mole of oxygen (O2) releases 445 kJ of energy c) reacting one mole of
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May 10 2011 · hey i need help with this practice test im not cheating or anything its just so that i can practice for my test. help me out ) 1) Which statement about the following reaction is correct CH4 (g) 2O2 (g) yields CO2 (g) 2H2O(l) deltaH = -890 kJ a) reacting one mole of oxygen (O2) absorbs 445 kJ of energy b) reacting one mole of oxygen (O2) releases 445 kJ of energy c) reacting one mole of Apr 13 2010 · Anonymous asked in Science Mathematics Chemistry · 1 decade ago very hard chemistry question please help me Your 2009 Ferrari F430 averages 17L / 100km and you drive an average of 12 000 miles per year.
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Yahoo Answers community guidelines. We have the best place on the web to ask and answer questions on a variety of topics. Learn more about our expectations and code of conduct. Report and appeal abuse in Yahoo Answers. Help keep the community safe Oct 06 2009 · Zinc dissolves in hydrochloric acid to yield hydrogen gas Zn(s) 2HCl(aq) → ZnCl2(aq) H2(g) When a 12.7 g chunk of zinc dissolves in 500. mL of 1.450 M HCl what is the concentration of hydrogen ions remaining in the final solution 0.388 M 0.674 M 0.776 M 0 M 1.06 M
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Mar 26 2020 · Yahoo Products clubber861. clubber861 asked in Science Mathematics Chemistry · 1 year ago. Can you please help me answer this chemistry question What is the q value. For CaCl in the following process.7.3 grams of Cacl2 where dissolved in 100 ml of water. The water temperature changed from 12.5C to 31.9C. Apr 08 2010 · In the reaction 2CO (g) O2 (G) -----> 2CO2(g) what is the ratio of moles of oxygen used to moles of CO2 produced a. 2 2 b. 1 c. 1 2 d. 2 1 Which conversion factor do you use first to calculate the numbr of grams of CO2 produced by the reaction of 50.6 g of CH4 with O2 The question for the complete combustion of methane is CH4(g) 2O 2 (g) -----> CI2 (g) 2H2O (I) a. 2 mol O/ 1mol CO2
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Aug 26 2012 · please help me with this chemistry question Express the concentration of a 0.0120M aqueous solution of fluoride F- in mass percentage and in parts per million. Assume the density of the solution is 1.00g/mL. Aug 22 2011 · Can you please help me answer this question i know the answer but I don t understand how they got it 1. CH4 (g) 2O2 (g) = CO2 (g) 2(H2O) (l) Natural gas methane CH4 gives out 890KJ when one mole is burnt completely. How much heat would be given out when 8g of methane is burnt completely Also 2. Approximately how much methane would have to be burnt to
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Jul 05 2019 · Please help me with this Chemistry Questions Benzene (C6H6) consists of a six-membered ring of carbon atoms with one hydrogen bonded to each carbon. Write Lewis structures for benzene including resonance structures. Dec 23 2010 · Chemistry Question Please help me Join Yahoo Answers and get 100 points today. Join. Trending questions. Trending questions. A sample of gas has an initial pressure of 1.50 atm at a volume of 3.40 L at a temperature of 20.0°C. 4 answers. How to remove glue / adhesive residue from metal
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Find an answer to your question it is a chemistry question please help me. If j = 5/2 what values of l are possible haqbin2020 haqbin2020 39 minutes ago English Secondary School See answer haqbin2020 is waiting for your help. Add your answer and earn points. Aug 22 2011 · Can you please help me answer this question i know the answer but I don t understand how they got it 1. CH4 (g) 2O2 (g) = CO2 (g) 2(H2O) (l) Natural gas methane CH4 gives out 890KJ when one mole is burnt completely. How much heat would be given out when 8g of methane is burnt completely Also 2. Approximately how much methane would have to be burnt to
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Jul 10 2010 · please help me with this chemistry question Uuo is the noble gas after Rn. To go from (Rn) to (Uuo) you must first fill four subshells (s p d f) with a total of 32 electrons. Thus the atomic numbers of 6th and 7th period elements of the same group differ by 32. 1) To go from (Uuo) to the next noble gas however you would theoretically fill Jan 13 2009 · I need to know the name of these chemical compounds. The numbers are subscripts-I just don t know how to make them look that way Sorry. CuCN (I think this one is Copper Cyanide..) XeF4 (Xenon Tetrafluoride ) Ca(CH3COO)2 KCO For this one I need to know the oxidation states too. PbO2 Thanks so much
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Jul 04 2013 · Chemistry question help me please Ethyl butyrate CH3CH2CH2CO2CH2CH3 is an artificial fruit flavor commonly used in the food industry for such flavors as orange and pineapple. Its fragrance and taste are often associated with fresh orange juice and thus it is most commonly used as orange flavoring. Mar 16 2010 · please help with me this chemistry question A compound is constituted by mass of 22.6 phosphorus the rest being chlorine. Given that a volume of 307 mL of the gas has a mass of 1.55 g at 25 °C and 90 kPa find the molecular formula for this compound.
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Oct 15 2015 · Calculate the relative molecular mass of a gas which has a density of 2.615g dm -3 at 298K and 101 kPa They gave me this equation PV=nRT Where P=pressure (Pa) V=volume(m 3) n=number of moles R=gas constant (8.31 j mol -1 k -1) T= tempreture (K) The answer is 64.1 but I need the working out. Thanks in advance PLEASE help me answer the blanks BRAINLIEST to the answers that help the pH can be found based off of the number before. Thanks Answers 1 Show answers Another question on Chemistry. Chemistry 21.06.2019 18 30. For each of the following mixtures decide if filtering would be suitable to separate the substances. explain your answers
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Aug 22 2011 · Can you please help me answer this question i know the answer but I don t understand how they got it 1. CH4 (g) 2O2 (g) = CO2 (g) 2(H2O) (l) Natural gas methane CH4 gives out 890KJ when one mole is burnt completely. How much heat would be given out when 8g of methane is burnt completely Also 2. Approximately how much methane would have to be burnt to Oct 21 2011 · whatsup asked in Science Mathematics Chemistry · 9 years ago. Please help me with this chemistry question PLZ Look at the following redox reactions. P4(s) 10HClO(aq) 6H2O(l) → 4H3PO4(aq) 10HCl(aq) Indicate which elements are oxidized and which are reduced. Answer Save. 2 Answers. Relevance. ChemTeam. Lv 7. 9 years ago
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Jul 15 2019 · Yahoo Answers is shutting down on 4 May 2021 (Eastern Time) and as of 20 April 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services or your Yahoo account. Jul 24 2011 · Anonymous. asked in Science Mathematics Chemistry · 10 years ago. Please help me with these chemistry questions I m very confused. Thank you 1. When 13.6 grams of KCl are dissolved in enough water to create a 180-gram solution what is the solution s concentration expressed as a percent by mass 4.6 KCl.
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Jul 15 2019 · Yahoo Answers is shutting down on 4 May 2021 (Eastern Time) and as of 20 April 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services or your Yahoo account. Jul 10 2010 · please help me with this chemistry question Uuo is the noble gas after Rn. To go from (Rn) to (Uuo) you must first fill four subshells (s p d f) with a total of 32 electrons. Thus the atomic numbers of 6th and 7th period elements of the same group differ by 32. 1) To go from (Uuo) to the next noble gas however you would theoretically fill
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Mar 13 2008 · Please help me out with this chemistry question Suppose that 4.00 grams of NaOH(s) is dissolved in 1.00 liter of a solution that is 0.50 molar in NH3 and 0.50 molar in NH4 . Assuming that there is no change in volume and no loss of NH3 to the atmosphere calculate the concentration of hydroxide ion after a chemical reaction has occurred. Apr 30 2011 · How many air molecules are in a 13.0X12.0X10.0 ft room Assume atmospheric pressure of 1.00atm a room temperature of 20.0 degrees Celsius and ideal behavior Volume conversion There are 28.2 liters in one cubic foot. I ve tried to calculate the answer but I can t seem to get the right one. Please help me out. Thanks
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May 25 2012 · chemistry question please help me in the haber process for the manufacture of ammonia nitrogen and hydrogen react as show in the equation N2 3H2<>2NH3 delter H = Dec 14 2007 · 1. at 525 mm Hg and 85 degrees C the volume of a sample of nitrogen gas is 26.8 L. What is the volume at STP a. 1 L b. 10.9 L c. 15.3 L d. 15.3 L (i dont know why there are two of the same choice) 2. when a 0.500 mole of sodium is produced according to the reaction 2NaN3 -->3N2 2Na how many moles of nitrogen gas are also produced a. 0.750 moles b. 1.5 moles c. 2 moles d. 3
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Jun 21 2020 · Please Help me With This Chemistry Question Suppose you choose the initial masses so that both reactions produce PCL3. Explain how both of these chemical reactions obey the law of definite proportions even though they produce different numbers of moles of the product. Dec 14 2007 · 1. at 525 mm Hg and 85 degrees C the volume of a sample of nitrogen gas is 26.8 L. What is the volume at STP a. 1 L b. 10.9 L c. 15.3 L d. 15.3 L (i dont know why there are two of the same choice) 2. when a 0.500 mole of sodium is produced according to the reaction 2NaN3 -->3N2 2Na how many moles of nitrogen gas are also produced a. 0.750 moles b. 1.5 moles c. 2 moles d. 3
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May 08 2011 · please help me answer this chemistry question ) You are given three liquids. One is a pure substance and the second is a solution of two miscible liquids. The third is a solution composed of a solid solute dissolved in a liquid solvent. Describe the procedure you would follow ot distinguish between the 3 solutions. May 01 2011 · I need urgent help with this question could someone urgently help me. Sodium can exist in a number of different forms called isotopes. Two of these isotopes are Na-22 and Na-23. Sodium can also exist as the ion Na . In terms of atomic structure discuss the similarities and differences between Na-22 Na-23 and Na .
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