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For the following reaction, calculate the grams of indicated product when 16.9 g of the first reactant and 10.4 g of the second reactant is used:
Fe2O3(s)+3H2(g)→2Fe(s)+3H2O(l) (H2O)
Use the values in Appendix D of your text to calculate Ka to four decimal places for the hydrogen sulfate ion at 25 °C. (The answer in my Chem II text is 0.012.) HSO4-(aq) SO42-(aq) + H+(aq) Ka = ?
Compute the molar mass of the bio molecule. For carbon tetrachloride, the boiling point constant is 5.03C.kg/mol. and the boiling point of pure carbon tetrachloride is76.50C.
a. how would you prepare 100ml of 0.5m naoh? calculate the mass of naoh needed and describe the procedure and glassware
Explain for which of the following species resonance is an important property: HONO, HONO2, N3-, NO2-, NO2.
Butadiene can undergo the following reaction to form a dimer (two butadiene molecules hooked together). 2C4H8(g) > C8H12(g) The half-life for the reaction at a given temperature is 5.92*10^-2 sec
Propose a structure for an amine of formula C4H9N, which liberates a gas when treated with NaNO2 and HCl. The 13C NMR spectrum is as follows
Problem- Write the balanced chemical equation and base-equilibrium expression (Kb) for the dissociation of NaC2H3O2 in water. Perform the necessary calculations to determine the expected pH of a 0.10 M solution of NaC2H3O2. Show your work.
What is the heat capacity of a bomb calorimeter if the combustion of 2.757 mmol of salicylic acid (C7H6O3(s), Hcomb = -3022 kJ/mol) increases the temperature of the calorimeter by 2.612°C
Provide the arrow pushing mechanism of the synthesis of hexaphenylbenzene from diphenylacetylene
What is the molality of a solution of ethylene glycol that contains 63.0 g of (CH2OH)2 dissolved in 557.5 g of water? Use molar masses with at least as many significant figures as the data given.
Use the following information to find H °f of gaseous HCl: N2(g) + 3H2(g) ? 2NH3(g) ?H°rxn = - 91.8 kJ N2(g) + 4H2(g) + Cl2(g) ? 2NH4Cl(s) ?H°rxn = - 628.8 kJ NH3(g) + HCl(g) ? NH4Cl(s) ?H°rxn = - 176.2 kJ
The following pressure and volume data were obtained for 1.00 gram of unknown gas at 90.0C. Calculate the molar mass of the unknown gas in g/mol.
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