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How many liters of CH4 at 27 degrees C and 1.5 atm are required to react with 1 mole of oxygen? (13) (00821) (300K) / 1.5 atm = 320.19/1.5 = 213.46 liters CH4 Is this right?
A 670 mL gas sample at STP is compressed to a volume of 284 mL, and the temperature is increased to 20 C. What is the new pressure of the gas in Pa? Answer in units of Pa.
What would happen to the pressure of a confined gas sample if the volume of that sample was decreased while the temperature was held constant?
Calculate the mass/volume percent of a solution in which 168 of is dissolved in enough water to give a total volume of 1.28 .Express your answer numerically.
Propanoic acid (CH3CH2COOH) has a Ka of 1.34 × 10-5. A 25.00 mL sample of 0.1000 M propanoic acid (in flask) is titrated with 0.1000 M NaOH solution, added from a buret. Carry out the calculat
Helium gas at 25 oC filled a balloon to a volume of 2.25 L. What would the volume of this balloon be when cooled (at constant pressure) to liquid-nitrogen temperature (-196 oC)?
A syringe initially holds a sample of gas with a volume of 285 mL at 355 K and 1.88 atm. To what temperature must the gas in the syringe be heated/cooled in order to have a volume of 435 mL at 2.50
Explain how alkene/aromatic C-H stretches are distinguishable from alkane C-H stretches. DO the C-H stretch peaks in the IR spectra of triphenylmethanol, bromobenzene, and benophenone occur.
A solution of ethanol (C2H5OH) in water is prepared by dissolving 90.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 255.0 mL of solution. What is the molarity of the ethanol in this
A cylinder of compressed nitrogen gas contains 867 g N2. If the volume of the cylinder is 22.5 L, what is the pressure of the N2 if the gas temperature is 298K?
What will be the impact on mechanical properties of the blend if the components are immiscible?
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