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When 1 mol of Fe2O3(s) is formed by combustion of Fe(s)with O2(g), 824 kJ of heat is liberated. By this reaction, how many mol of Fe should be consumed in order to liberate 100. kcal of heat?
What is the reciprocal of the linear dispersion. Could the two emission lines of hydrogen, 656.28 nm and 656.10 nm be resolved to the base line with a slit width of 0.010mm. Note that the blaze angle is given in wavelength. Using the balze angle f..
Calculate the molar concentration of Tl+ and Cl- in this saturated solution. Calculate Ksp value for TlCl at this temperature
a 25-rm g sample of an alloy at 88circ c is placed in 50. rm g water at 13circ c. if the final temperature reached by
ammonia is both a donor and an acceptor of hydrogen in hydrogen-bond formation. draw a diagram showing the hydrogen
Why is it an important concept that atoms generally appear in whole number molar ratios to each other in chemical compounds, and in general, would you expect that students would find this ratio to be lower or higher than the actual ratio
How many milliliters of 0.105 M HCl are needed to titrate 50.0 mL of a solution that contains 1.25 g of NaOH per liter?
at 350 k kc 0.142 for the reaction 2brclg br2g cl2g an equilibrium mixture at this temperature contains equal
Na2CO3(s) (sodium carbonate) can be prepared by heating NaHCO3(s) (sodium bicarbonate). If a sample of NaHCO3 is placed in an evacuated flask and allowed to achieve equilibrium with the products which are formed at 100ºC, what will the total gas p..
a boy use a metalnbsp that was heat up in hot h2o and then put into a styrofoam cup of h2o at room temperature.
How much heat is required to boil 48.5g of water at its boiling point? Express your answer numerically in kilojoules. Please answer with a decimal
Assuming that the calibration curve passes through the origin, what absorbance would be recorded for a solution with a Pb(NO_3_)_2_ concentration of 0.335 M.
The reaction between sodium metal and chlorine gas is highly exothermic and produce NaCl. Comment on this observation relative to the calculated enthalpy for the aforementioned gas-phase reaction.
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