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Atmospheric pressure decreases as you ascend into the mountains.The atmospheric pressure on the summit of Mount Everest (8846m, the highest elevation on earth) is only 30% of the standard atmospheri
On a smoggy day in a certain city the ozone concentration was 0.42 ppm by volume. Calculate the partail pressure of ozone (in atm) and the number of ozone molecules per liter if the temperature and
What is the total volume of gaseous products, measured at 397 degrees celsius and 726 torr, when an automobile engine burns 100g C8H18 (a typical component of gasoline)?
The freezing point depression of a 1.00% by mass solution of acetic acid in benezene is 0.441 celsuis. Kf for benzene = 5.12 celsuis/m; Calculate the formula mass of acetic usion these datas.
Infrared lamps are used in cafeterias to keep food warm. How many photons per second are produced by an infared lamp that consume energy at the rate of 95W and is 14% efficient in coverting this ene
Refer to the intergative Example .Determine whether ornot n = 138 is a bound state .If it is ,what sort of state is it ?what is the radius of the orbit and how many revolutions per second does the e
You are given amixture of two liquids, A and B, to purify. The boiling point of Ais 75ºC and the boiling point of B is 195ºC.The composition ofthe mixture is 50% A and 50% B. You still dec
A patient weighs 146 pounds and is to recieve a drug dose of 45.0 mg per kg of body weight. The drug is supplied as a solution that contains 25.0 mg of drug per ml of solution how many ml of the dru
In the formation of an alum, 12 waters of hydration are hydrated to the metal ions in the crystalline alum structure. Are the water molecules more strongly hydrated to the monovalent cation or
Lithium forms compounds which are used in dry cells and storage batteries and in high - temperature lubricants. It has two naturally occurring isotopes, ^6Li (isotopic mass = 6.015121 amu) and
What does rate mean in terms of a chemical reaction? What are orders in a rate law? Explain how you could experimentally determine the rate law of a reaction.
The vapor pressure above a sugar-water solution at 25°C is 20.4torr. What is the mole fraction of sugar in the solution? (Assume sugar is a nondissociated, nonvolatile solute and that the vapor
A biochemist studying the breakdown in soil of the in secticide DDT finds that it decomposes by a first-order reaction with a half-lifeof 12 yr. How long does it take DDT in a soil sample to decompo
Enzymes in human liver catalyze a large number of reactions that degrade ingested toxic chemicals. By what factor is the rate of adetoxification reaction changed if a liver enzyme lowers the activat
A 150.0-g sample of a metal at 75.0C is added to 150.0-g ofH20 at 15.0C. The temperature of the waterrises to 18.3C. Calculate the specific heat capacity of the metal,assuming that all the heat lost
Lemon juice has a pH of about 2.5. Assuming that the acidity of lemon juice is due solely to citric acid, that citric acid is a monoprotic acid, and that the density of lemon juice is1.0 g
The partial pressure of oxygen in air at sea level is 0.21 atm. Calculate the molar concentration of oxygen in a lake saturated with air at 20 degrees celsius and an atmospheric pressure of 660 torr
Argon crystallizes in the face-centered cubic (fcc) arrangement at40 K. Given that the atomic radius of argon is 191 pm, calculate the density of solid argon.
Vanadium crystallizes in a body-centered cubic lattice (the V atoms occupy only the lattice points). How many V atoms are present in a unit cell?
Determine the average reaction rate between 600 and 1200seconds. Also determine the instantaneous rates at 600 secand 1800 sec.
A 30.84mL volume of 0.128M NaOH is required to reach the phenolphthalein endpoint in the titration of a 5.441g sample of vinegar. Calculate the percent acetic acid in the vinegar.
Suppose that four tubes varied in concentration and one considered the "standard" were used in a spectrophotometer for measuring theconcentration of Cu2+.
The cyanide anion is a nucleophile and, when attached toa carbon atom ,under goes hydrolysis under basic conditions to the carboxylate anion.
You have a TLC plate that measures 10.0 cm length wise (total length. You prepare it for spotting as described in the procedure (Hint: make sure you consider ALL steps in the preparation for spottin
If the volume of a 0.135 M solution of KMnO4 required tooxidize 20.0ml of a FeSO4 solution in an acidic medium is 16.00 ml,what is the concentration of the FeSO4 solution?