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Find the normal boiling point of a saturated solution of LiF at 100 ? C, assuming it un- dergoes complete dissociation.
A bacterial culture isolated from sewage produced 35.5 mL of methane, CH4, at 31 oC and 753 mmHg. What is the volume of this methane at STP?
In the following experiment, a coffee-cup calorimeter containing 100. rm mL of rm H_2O is used. The initial temperature of the calorimeter is 23.0 rm ^{circ}C. If 3.70 g of rm CaCl_2 is added to the
Determine the volume of O2 (at STP) formed when 50.0 g of KClO3 decomposes according to the following reaction. The molar mass for KClO3 is 122.55 g/mol.
A gas occupying a volume of 940. mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
Which has a rate constant given by k = 1.8×10-12 e-1370/T cm3 molecules-1 s-1. Use the following standard heats of formation. What is the activation energy of this reaction?
A 54.7-g sample of aluminum at 95.0 oC is dropped into 35.0 g of water at 40.0 oC. What is the final temperature of the mixture? (specific heat capacity of aluminum = 0.89 J/goC; specific heat capac
A 1.50 L mixture of helium, neon, and argon has a total pressure of 1.47 atm at 298K. If the partial pressure of helium is 0.38 atm, and the partial pressure of argon is 0.32 atm, what mass of neon
Consider a certain type of nucleus that has a rate constant of 2.62 * 10^-2 min^-1. Calculate the time required for the sample to decay to one-fourth of its initial value.
An ethylene glycol solution contains 21.2 g of ethylene glycol in 85.4 ml of water. Compute the freezing point and boiling point of the solution.
A 480- sample of the dry gas at 125 and 28 , when reacted with 80.0 of water, yielded a 0.080 solution of. What is the molecular formula for the gaseous product?
When o.514 g of biphenyl (C12H10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.8 to 29.4 degree Celcius. Find delta energy reaction for the combustion of biphenyl in KJ/
A 2.0L kettle contains 116g of boiler scale (CaCO3). how many times would the kettle have to be compleletly filled with distilled water to remove all of the deposit at 25degC?
What are some valid resonance structures for CS2? Other than S=C=S; can I have S triple bonded to C single bonded to S? Wouldn't there be three electrons left on the triple bonded S; it would be sh
Nickel is to be deposited on a platinum cathode (area=120cm2) from a solution that is 0.200M in Ni2+ and buffered to a pH of 2.00.
If a 10.0 g sample of Zn(s) is treated with excess HCl, what volume of hydrogen gas is evolved at STP?
A sample of gas occupies 15.0 liters at 4.00 atmospheres and 300 K. What is the new volume of the gas if pressure is decreased to 2.00 atmospheres and temperature is increased to 400 K?
A 1.33 M solution of citric acid (H3C6H5O7) in water has a density of 1.10 g/cm3. Calculate the mole fraction of the citric acid.
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.