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Find the absolute uncertainty of the following calculation and round the answer to the proper number of significant figures: 3.78(±0.04) x 6.23(±0.03) x 1023 = 2.3549 x 1024.
The answer is 2.35(±0.03) x 10^24 but I keep getting a different value for uncertainty when I do the problem.
A system absorbs 192 kj of heat and the surroundings do 120 kj of work on the system. what is the change in internal energy of the system
Another hypothetical molecular compound, Y 2(g), has a bond energy of 750 kJ/mol, and the molecular compound XY(g) has a bond energy of 1500 kJ/mol. Using bond-energy information, calculate ?H for the following reaction:
A dead alkaline battery is found to contain a compound of Mn and O. Its analysis gives 69.9% Mn and 30.4% O. What is the empirical formula for the substance.
Determine the mass of water when 12.5L NH3 (at 298 K and 1.50 atm) is reacted with 18.9 L of O2 (at 323 K and 1.1 atm)
Paradichlorobenzene, C6H4Cl2 is a component of mothballs. A solution of 2.00 g in 22.5 g of cyclohexane boils at 82.39 C . The boiling point of pure cyclohexane is 80.70 C. Calculate Kb for cyclohexane. Express the constant numerically in degrees C..
Calculate the standard free-energy change for the following reaction at 25 degrees C. 2Au^3+(aq) + 3 Cr(s) 2Au(s) + 3Cr^2+(aq) delta G^degree= ? KJ/mol
Derive an expression for (δU/δV)T for a gas that obeys the van der Waals equation of state.
what is the ph at the stoichiometric point end point for the titration of 50 ml of 0.20 m methyl amine ch3nh2 aq with
Calculate the specific heat of the metal and its approximate atomic mass. Suggest a name for the unknown metal. Specific Heat: atomic mass: element
The dipole moment of hydrogen chloride is 1.08D while that of hydrogen bromide is 0.82D. On the basis of dipole-dipole interactions, hydrogen chloride should have a higher boiling point than hydrogen bromide. The opposite is the case, however. Why
Determine the energies of ten lowest energy levels for this system.
An experiment requires 42.5 g of sulfuric acid, which is easier to measure by volume than by mass. What volume in mL should be measured out, if the density of the sulfuric acid is 1.84 g/cm^3
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