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heat evolved on combustion of 1 kg starch ( C6H10 O5 ) into CO2 and H2O ( L ) is 17. 49 kj / kg . compute the enthalpy of formation of 1 g starch . given Del Hf of H20 ( L ) = - 285.85 KJ /MOL Del Hf of CO2 = - 293.7 KJ /MOL
We add excess Na2CrO4 solution to 16.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.380 grams.
Write the electron configuration of the alkali metal (M) that reacts with oxygen to yield an oxide, M2O, if 3.54 g of the metal reacts
What is the electronic geometry of the oxygen atom, O3 ? Answer a. tetrahedral b. triangular planar c. linear d. T-shaped e. angular
q1. using the ice table calculate the ph of a solution that contains 0.0075 m lactic acid and 0.085 m sodium
A water solution contains molecule Z molecular weight 230 and NaCl. The solution is ionized with ESI method, as well as injected to a mass analyzer. In the collected mass spectrum what m/z peaks (value) might you expect to observe
Draw the skeletal structure of the given molecules given that each atom obeys the octet/duet rule and no atom possesses a formal charge, for the molecule whose condensed structure is (a) (CH3)2CHCHCHC(CH3)3
The baking soda decomposes into sodium carbonate, water vapor as well as carbon dioxide. How many liters of gas will be produced at 155 Celsius as well as 753torr by the complete decomposition of 3.2 grams of the sodium bicarbonate? Illustrate bal..
Number of unpaired electrons in the nitrogen atom
0.75 g of hydrogen chloride (HCl) is dissolved in water to make 7.0 L of solution. What is the pH of the resulting hydrochloric acid solution.
The normal boiling point of the liquid is 425 K. Liquid, X, and Y are all in equilibrium at 342 K and 1800 bar. Tc = 571K, Pc= 46 bar
Problem- Given the relevant standard free energies of formation, in kJ per mole, calculate delta G for the following reaction at 25 C: 2C2H2(g) + 5O2(g) --> 4CO2(g) + 2H2O(l)
in a combustion reaction 4 moles of c8h18 react with 8 moles of o2. if the actual yield of co2 produced is 28.16 grams
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