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A reaction occurs in a calorimeter that contains 120.0 g of water at 25.0°C, and 514.95 cal of heat is evolved. If the specific heat capacity of water is 1 cal/deg-g, what is the final temperat
Use reactant molecules to write appropriate elementary reactions that satisfy the following criteria. Ignore aggregation states. Write A unimolecular decomposition that generates Cl.
a first order reactionhas a rate constant 0.00510.if we begin with 0.10 M concentration of the reactant , how much of the reactant will remain after 3 hrs?
the combustion of 0.825 g of benzoic acid, for which the internal energy of combustion is 3251 kJ mol1, gave a temperature rise of 1.940 K. Calculate the internal energy of combustion of d-ribose an
what is the molecular shape of 2-butanol C2H9OH? what are the bond angles, molecular polarity and the hybridization of the bonded atoms?
The temperature of a sample of water increases from 21.7°C to 46.1°C as it absorbs 5605 J of heat. What is the mass of the sample?
Calculate the molality of a sucrose (C6H22O11) solution containing 14.3 g of sucrose in 676 g of water.
How much heat is required to convert 20.0 of ethanol at 23 to the vapor phase at 78 ? Ethanol () boils at 78. Its density is 0.789 . The enthalpy of vaporization is 38.56 . The specific heat of liqu
a perfect gas undergoes isothermal compression which reduces its volume by 2.20 L. the final pressure and volume of the gas are 3.78x10^3 torr and 4.65 L, respectively. calculate the original pressu
Hydrogen gas was collected over water in a eudiometer at 26 oC when the atmospheric pressure was 756 mm Hg. What was the pressure of the hydrogen gas?
The first-order rate constant for the decomposition of N2O5, How many moles of N2O5 will remain after 4.6 min?
How much carbon dioxide in kilograms is produced upon the complete combustion of 28.4 {rm L} of propane (approximate contents of one 5-gal tank)?
A student begins a kinetics experiment with a solution containing 0.050 % starch. At time zero (t = 0.00 min), the student adds an enzyme that catalyzes the decomposition of starch. At t = 1.00 min,
Determine the molar concentration of an unknown solution given that its absorbance A is 0.450 Au.
The equilibrium constant KP is 158. Analysis shows that the partial pressure of O2 is 0.74 atm at equilibrium. Calculate the pressure of NO and NO2 in the mixture.
How many moles of BCl3 are needed to produce 25.0 g of HCl(aq) in the following reaction?
A 64 g piece of ice at 0 degrees celsius is added to a sample of water at 9 degrees celsius. all of the ice melts and the temperature of the water decreases to 0 degrees celsius. How many grams of w
Solid silver nitrate is added to a solution that is 0.0010 M each in NaCl, NaBr, and NaI. For AgI, ksp= 1.5x10^-16, for AgBr, ksp= 3.3x10^-13, and for AgCl, ksp= 1.8x10^-10
A 10.0L container of helium gas with a presure of 250mmHg at 0 degrees Celsius is heated to give a pressure of 1500mmHg. What is the temperature in degrees Celsius?
Calculate the solubility of zinc hydroxide, Zn(OH)2, in 1.00 M NaOH. Ksp = 3.0 × 10-16 for Zn(OH)2, Kf = 3.0 × 1015 for Zn(OH)42-
The Henry's law constant for helium gas in water at 30°C is 3.7 10-4 M/atm; that for N2 at 30°C is 6.0 10-4 M/atm. If the two gases are each present at 1.2 atm pressure, calculate the solubi
A sample containing 0.175 g of cl- is dissolved in 50 ml of deionized h2o. The solution is titrated to the equivalence point with a AgNO3 solution. The final volume of the titrated sample is 75 mL.
How many moles of are in the tube of toothpaste? How many fluoride atoms are in the tube of toothpaste? How many grams of sodium ion are in 2.10 toothpaste? How many molecules of triclosan are in th
A cylinder with a moveable piston contains 0.93 of gas and has a volume of 344. What will its volume be if an additional 0.22 of gas is added to the cylinder? (Assume constant temperature and pressu
what is the equation for ninhydrin test of egg white? also for the ninhydrin test of aspartame?