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An experiment produces 15.0 grams of hydrogen for every 71.0 grams of oxygen used. How many grams of oxygen will you need to produce 6.0 g of hydrogen
Why is acetanilide more reactive than methyl benzoate in a competetive nitration
calculate the pH of the buffer after the addition of 0.15 mL of 6M HCl based on the known value of Ka for acetic acid
What is the overall balanced reaction in the direction that it is spontaneous and calculate the standard cell potential.
For the synthesis of ammonia given below, calculate the free energy change, delta G, from the elements under standard conditions at 25 degrees celcius. N2 (g) + H2(g) -> NH3(g)
How many grams of Potassium Chlorate decompose to passium chloride and 638mL of O2 at 128 degrees C and 752 Torr. 2KClO3 (s) => 2KCl (s) + 3O2(g)
The Nernst equation is used to predict the impact of concentration on the cell potential. What value of slope does the Nernst equation predict for a plot of Ecell vs log(Cu2+ Conc. Ratio)
Nitrogen forms several gaseous oxides. One of them has a density of 0.869 g L-1 measured at 764 mmHg and 150°C. Write the formula of the compound
If a 1-mole sample of a real gas from a compressed gas cylinder goes from 230 atm to 1 atm and from a volume of 1cm3 to 195cm3, what is the entropy change for the expansion if it is assumed to be is
50.0 mL of 0.10 M HNO2 (Ka=4.5E-4) is added to 25.0 mL of 0.25 M KNO2 solution. What is the pH of the final solution
Dilantin is formulated as the sodium salt of phenytoin. Draw the structure of the product on addition of one equivalent of sodium hydroxide to phenytoin.
Hydrogen atoms that are bonded to an sp3 hybridized carbon atom normally appear between 0.9 - 1.8 ppm and are said to be shielded. What would cause the hydrogen atoms bonded to an sp3 hybridized car
If Ecell =1.44 V for a reaction utilizing 2 moles of electrons for each mole of electrons for each mole of desired product, but measurement shows that Ecell=1.56 V and the temperature is 15 celsius,
What would be the adol addition product resulting from the reaction of 2 molecules of pentanal
If the original activity of a radioactive substance was 2.00 Ci and later the activity was measured to be 9.25x10^9 Bq, how many half-lives have passed
Carbon-14 decays with a half-life of 5730 years. What is the first order rae constant for its decay in units of years^-1
Which of the following would have the lowest frequency factor A( part of the Arrhenius equation in a situation where all concentration are 1M and take place at identical temperatures
Reaction A has positve delta H and positve delta S, reaction B has positive delta H and negative delta S, reaction C has negative delta H and positiveS, reaction D has has negative delta H and negat
Once, it is important that the level of the elution solvent not drop below the top of the adsorbent why? the absorbent is packed in a liquid chromatography column
What is the maximum mass in grams of NH3 that can be produced by the reaction of 1.0g of N2 with 3.0g of H2
A radioactive sample contains 1.30g of an isotope with a half-life of 3.5 days. What mass of the isotope will remain after 5.6 days? (Assume no excretion of the nuclide from the body.)
With which of the metals Cu(s), Al(s), Ag(s), Fe(s) and Zn(s) is reaction with H+(aq) ions to produce H2(g) a spontaneous reaction. Select three oxidizing agents that are capable of oxidizing Cl-(aq)
Combining aqueous solutions of BaI2 and Na2SO4 gives a precipitate. Which ion(s) is/are spectator ions in the reaction
The temperature of a 15g sample of lead metal increases from 22oC to 37oC upon the addition of 29.0 J of heat. The specific heat capactiy of the lead is jg*K
Use the Rydberg equation to predict the wavelength of the electromagnetic radiation emitted for following electron transitions for the hydrogen atom (rounded-off to the nearest 0.1nm).