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if you are a maintainer of this web content, please refer to the site documentation regarding web services for further assistance. This option may be re enabled by the project by placing a file with the name .htaccess with this line: calculate the maximum wavelength of light capable of removing an electron for a hydrogen atom from the energy state of n 4 if it requires an energy of at least 1.36 x10^ 19 j to do this. Please help with formulas to use? the longest wavelength of light that will cause an electron to be emitted from a metal is 520nm. What is the work function for this metal? note: the work function is given as kj/mole of electrons released if you begin with 0.030 l of a 2.5m naoh solution, what concentration will you end up with if you dilute it to 0.050? what volume of oxygen is required to completely combust 80 of butane find the concentrations of h+, hco3 , co3 2 in a 0.025m in h2co3 solutions which of the following is true for an acid? a. Answer this quest a compound has the empirical formula chcl.a flask with volume 253 cm3 at temperature of 373k and pressure of 1.0 atm contains 0.8 g of the gaseous compound. Why do warm temperatures speed up the fermentation of milk? 2g agcl is obtainded by adding an excess of agno3 solution to a solution containing 1g of a mixture of nacl and kcl.what is the ratio of moles of two salts in the mixture? the world record for a human holding their breath is 11 minutes, but most people can only hold it for a few minutes.

If a women holds her breath at the maximum lung capacity 4.2 l , calculate the final pressure in her lungs, if her body temperature is 37.0 c and the ambient. Calculate the following and write your answer in scientific notation 6.6 x 10^6 8.8 x10^2 x 2.5 x 10^3 how many grams of nano2 must be added to 1 liter of 1.00 m hno2 solution in order to prepare a buffer solution with ph 4.14? ph 3.14? my work: ka ph buffer ratio 4.5 10^ 4 1.0 10^ 4.14 x m of base/1.00 m of acid x 6.21 6.21 m 6.21 moles/1 l 1 l 6.21. At what pressure would 0.150 mole of nitrogen gas at 23.0oc occupy 8.90 l? 23.o0c 250 k p 0.150 mol 8.31 kpa x l/ k x mol 250 k p is this right? chemistry vapor pressure a. What is the partial vapor pressure of a benzene above solution obtained by mixing 44.7 g benzene, c6h6, and 77.3 g toluene, c6h5ch3, at 25 c? at 25 c the vapor pressure of c6h6 95.1 mmhg the vapor pressure of c6h5ch3 28.4 mmhg. Thanks! which alcohol and carboxylic acid would produce isoamyl propanoate by fischer esterification when 6.0l of h2 reacts with 2.0l of n2, 4.0l of gaseous product are formed. Fb1 is a solution containing a mixture of potassium carbonate and sodium hydrogen carbonate. In one titration using phenolphthalein as indicator, 10.00cm^3 of the acid was needed.

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Gasoline, which can be represented by the formula octane, bulk density is 704 g/l. To estimate the variation in enthalpy when burning 28.5 liters gasoline, based on the binding energies: 0 0 117 kcal c 0 173 kcal 0 h 1 kcal c c 83 kcal c h 99 kcal a 10.3g sample of an elemental gas has a volume of 58.4l at 758torr when the temperature is 2.5 c. A student found that the weight of the naphthalene collected was less than the weight determined by difference. What would account for the smaller amount of naphthalene collected? how would you prepare a buffer 100ml of ph 6.8 and concentration 0.1m given solid imidazole mol wt. 68 and concentrated hcl which law of chemical combination is illustrated by the fact that 168 g of fe iron reacts with 72 g of water to form 232 g fe3o4 and 8g h2 ap chemistry determine the ph of the following solutions. Gasoline, which can be represented by the formula octane, bulk density is 704 g / l.

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To estimate the variation in enthalpy when burning 28.5 liters gasoline, based on the binding energies: 0 0 117 kcal c 0 173 kcal 0 h 1 kcal c c 83 kcal c h 99 kcal. Would it be advisable to determine the freezing point of pure p dichlorobenzene with one thermometer and the freezing point of the solution with a different one? explain. If 0.150 mole of a nonvolatile non electrolyte solute is present in 1200g of water, what are the.

What volume of 0.120 m naoh must be added to 100 ml of 0.100 m nahc2o4 to reach ph of 4.70? h2c2o4 ka1 5.9 x 10 2 hc2o4^ ka2 5.1 x 10 5 the answer is 60 ml but i dont know how to find it. Can you please show me the steps and how to do it please chemistry dr.bob 2 1. What are the units of the frequency factor, a, for a second order reaction? what is the required volume in ml to prepare a liter of solution 0.1 mol of nitric acid. chemistry! what observations are made when you bubble chlorine into a solution of potassium iodide? chemistry help calculate the amount in ml of 1.520m naoh that is required to add the following acetic acid solution to prepare a buffer with the corresponding ph: 30.00ml of a 5.00% w/v% acetic acid the resulting acetate buffer has a ph of 5.75. An 11.1 g sample of cacl2 is dissolved in 123 g water, with both substances at 24.0 c. Calculate the final temperature of the solution assuming no heat loss to the surroundings and assuming the solution has a specific heat capacity of 4.18 j/ c g. How many moles of fluroine are required to react with 12 g of sodium iodide? i already balanced it but am confused to go from here f2 + 2 nai 2 naf + i2 12 g nai + 2 mol nai/149.89 gnai 1 mol naf/1 mol nai 1 mol f2 / 2 mol naf 1.

A gas sample contained in a cylinder equipped with a moveable piston occupied 300.0 ml at a pressure of 2.00 atm. What would be the final pressure if the volume were increased to 500.0 ml at constant temperature? answer should include units. An atmospheric scientist interested in how no is converted into no2 in urban atmospheres carries out two experiments to measure the rate of this reaction. Calculate the valume of 200g og h2 what volume of 0.120 m naoh must be added to 100 ml of 0.100 m nahc2o4 to reach ph of 4.70? the answer is 60 ml but i dont know how to find it. Can you please show me the steps and how to do it please calculate solubility of agcl in g/l in a 6.5 10^ 3 m silver nitrate solution ksp 1.8 10^ 10 agcl molecular mass is 143.3g any idea on how to do this this is what i tried gt agcl gt ag + cl i 6.5 10^ 3 0 c same x e same x ksp ag cl 1.8 10^ 10 6.5 10^ 3.

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How many moles of bromine are used up? how many liters of bromine would be used if the reaction took place at stp? my answer. 1088 mole br2 and 2.44 l br2 calculate solubility of agcl in g/l in a 6.5 10^ 3 m silver nitrate solution ksp 1.8 10^ 10 agcl molecular mass is 143.3g any idea on how to do this this is what i tried gt agcl gt ag + cl i 6.5 10^ 3 0 c same x e same x ksp ag cl 1.8 10^ 10 6.5 10^ 3. Pka of acetic acid 4.74 the atomic spectrum of lithium has a strong red line at 670.8 nm. What is the energy of each photon of this wave length? what is the energy of 1 mole of these photons. 2 al s + 3 cl2 g 2 alcl 3 s if you begin with 2.70 g of al and 4.05 g of cl2, a which reactant is limiting? i need help asap here 39 s the problem i 39 m struggling with: when 1.00 mole of ethlyene c2h4 is burned at constant pressure, 1410 kj of energy is released as heat. Calculate delta h for a process in which 10.0 g of ethlyene is burned at constant pressure. 1088 mole br2 and 2.44 l br2 the atomic spectrum of lithium has a strong red line at 670.8 nm.

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