A 1.994 g sample of ethanol, CH3CH2OH, is combusted in a bomb calorimeter. The temperature of the calorimeter increases by 10.91 K. If the heat capacity of the bomb is 615.5 J/K and it contains 1.150 kg of water, what is the enthalpy change per mole of ethanol combusted? The specific heat...
In some solar-heated homes, heat from the sun is stored in rocks during the day and then released during the cooler night. (a) Calculate the amount of heat required to raise the temperature of 78.7 kg of rocks from 25.0 C to 43.0 C. Assume that the rocks are limestone, which is essentially...
a solution is prepared by adding enough water to 741 g of CsCl to form 1 L of solution. What is the mass of the solution? The density of the solution is 1.738 g/mL
A compound composed of nitrogen and oxygen has 2.5 moles of O for every mole of N. What is the empirical formula for this compound?
If a 190 piece of gold (density =19.32g/cm^3) is hammered into a sheet measuring 2.3*1.0ft, what is the average thickness of the sheet in meters?
If the shell having n=3, how many subshells does it have?
In Chemistry: the enthalpy of fusion of methanol (CH3OH) is 3.16kJ/mol. How much heat would be absorbed or released upon freezing 25.6grams of methanol?
what is te wavelength of light (nm) that has a frequency of 3.22 x 10^14 HZ
Solid calcium fluoride (CaF2) reacts with sulfuric acid to form solid calcium sulfate and gaseous hydrogen fluoride. The HF is then dissolved in water to form hydrofluoric acid. A source of calcium fluoride is fluorite ore containing 96 wt% CaF2 and 4%...
3. Ammonia is produced from nitrogen and hydrogen according to the following reaction: N2 + 3H2 2NH3 The fresh feed to the system, supplied at a total flow rate of 100 mol/min, consists of N2, H2 and 1.0 mole% inert gas. The ratio of moles...
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- 1. For organic chemistry, what is a concerted shift? How do things like acids or heat affect them? What other factors affect them?
2. Which of the following reactions is an acid-base neutralization reaction? Why are the rest of the answers incorrect?
- A. AgNo3 (aq) + NaI (aq) --> AgI (s) + NaNO3 (aq)
- B. S8(s) + 8O2 (g) --> 8SO2(g)
- C. Na3PO4 (s) + 2H2O (l) --> H2 (g) + 2NaOH (aq)
- D. Ca (OH)2 (aq) + 2HI (aq) --> CaI2(aq) + 2H2O (l)