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The reaction that produces the water gas mixture is as follows: C(s) + H2O(g) ? CO(g) + H2(g) This reaction requires an input of 131 kJ of heat for every mole of carbon that reacts.
a. Is this reaction endothermic or exothermic? Endothermic reaction
b. What is the energy change for this reaction in units of kJ/ mol of carbon?
A student added calcium ion, ca2+ to an aqueous solution and observed formation of a precipitate. Addition of HNO3 had no effect on the precipitate. What anion wa present in the original solution? Explain your answer
Which of the following pure liquids is the best solvent for carbon disulfide? HBr(l) CH3OH(l) C6H6(l) H2O(l) NH3(l)
Imagine that you are trying to design a new battery using the elements tin (Sn) and a halogen (Cl2, Br2, or I2) and you are using the reactions when SnCl2 and KBr are combined.
calculate the de broglie wavelength of an electron in the ground state of the h atom. show that this wavelength is
monoprotic acid. Dihydrogen pthalate (H2C8H4O4) is a diprotic acid. An analyte sample contains 0.127 M KHP and 0.0678 M (H2C8H4O4). What volume of a 0.205 M NaOH solution is required to neutralize 25.0 mL of the analyte solution.
calculate the change in entropy of the gas, the heat resevoir and the universe. what is the irreversible feature of this process
An organic acid contains 41.4% carbon, 3.47% hydrogen, and 55.1% oxygen by weight. A 0.080-mol sample of this compound weighs 11.60 g. What is the molecular formula of this acid
Which of the following statements for E2 reaction is/are correct? a) no rearrangement occurs b) the rate determining step is bimolecular c) the reaction is stepwise d) protic solvents are generally favored
What reagents will convert benzene to aniline the most efficiently? Also what reagents will convert toluene to p-aminobenzoic acid
It is often possible to change a hydrate into an anhydrous compound by heating it to drive off the water (dehydration). A 46.06 gram sample of a hydrate of MnSO4
The work function, W, of magnesium metal is 5.90x10^-19 J. Calculate maximum wavelength of light required to release electrons from the metal.
A 0.24ml sample of a weak acid with an unknown pKa was combined with 12.0ml of a 3.20M KOH and the resulting was diluted to 1.500L. The measured pH of the solution was 3.75. What is the pKa of the weak acid
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