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Consider the reaction between salicylic acid (C7H6O3) and acetic anhydride (C4H6O3) to form aspirin (C9H8O4): C7H6O3 + C4H6O3 → C9H8O4 + H2O What is the sum of all the coefficients in the balance
What is the molecular weight of a gas if a 250 mL sample of this gas collected over water at 735 mm Hg and 28.0°C has a mass of 1.25 gram? The equilibrium vapor pressure of water at 28.0°C
Refrigerators are usually kept at about 5 C , while room temperature is about 20 C. If you were to take an "empty" sealed 2-liter soda bottle at room temperature and place it in the fridge, would yo
The hydrocarbon is 79.89% carbon and 20.11% hydrogen by mass. Determine the molecular formula of the hydrocarbon.
Suppose you titrate a 25 ml sample of vinegar with 17.62 ml of a standardized 0.1045 N solution of NaOH. what is the molarity of acetic acid in this vinegar?
How much PV work is done and what is the value of total energy change (in kilojoules) for the reaction of 0.50 mol of H2 with 0.25 mol of O2 at atmospheric pressure if the volume change is -5.6L?
Benzene is a hydrocarbon that is commonly used as a commercial solvent. However, it is carcinogenic; i.e., accumulations in the body can cause cancer. What is the vapor pressure&nb
Energy in amount of 433 J is added to a 80 g sample of water at temperature of 27 degrees Celsius. What will be the final temperature for the water?
if the initial water level in the graduated cylinder is 21.2 ml and the level rises to 27.7 ml after the object is placed in the cylinder, what is the volume of the object?
The amount of manganese in steel is determined by changing it to permanganate ion. Complete/balance equation...describe each reaction. calculate E and delta G at 25 degrees C for each reaction.
A camping lantern uses the reaction of calcium carbide, CaC2 (s) , and water to produce acetylene gas C2H2 (g) , and calcium hydroxide, Ca(OH)2 (s).
A 0.17 mole sample of a gas is put into a balloon when the temperature is 26 degrees celsius and the pressure is 757 torr. What is the volume of the balloon?
The vapor pressure of chlorine dioxide (ClO2 ) is 155 Torr at -22.75 ? C and 485 Torr at 0 ? C. What is the normal boiling point of chlorine dioxide? The universal gas consta
Consider the following observations taken on successive, cloudless autumn mornings. On the first day, a considerable amount of frost is on the grass at sunrise. On the second day, only dew appears
What is the molarity of a solution of sodium hydroxide that contains 47.0 g of NaOH in 205.0 mL of solution? Use a molar mass with at least as many significant figures as the data given.
Calculate the potential volume of the gas contained in a 495 mL aerosol can when it is heated from 25°C to 54°C (approximately 130°F), assuming a constant pressure.
A sled-dog racer builds three identical igloos. One is used to store her supplies, another houses her team of 12 dogs, and the last one houses her. Which of the three igloos has the warmest internal
What is the solubility of helium in water at 30 ºC, if its partial pressure above the solution is 350 torr? The Henry's Law constant for helium in water at this temperature is 3.7 x 10-4 M/atm
A chemistry student needs of chloroform for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of chloroform is. Calculate the mass of ch
The most common source of copper (Cu) is the mineral chalcopyrite. How many kilograms of chalcopyrite must be mined to obtain 310. of pure?
The atomic weight of a newly discovered element is 110.352 amu. It has two naturally occuring isotopes. One has a mass of 111.624 amu. The other has an isotopic mass of 109.875 amu. What is th
A volume of 60.0 mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid. Express the molar concentration numerically.
Barium metal crystallizes in a body centered cubic lattice. the unit cell edge length is 502 pm and the density of the metal is 3.50g/cm3. using the information, calculate the avogadros number. assu
Calculate the standard enthalpy of formation of carbon disulfide (CS2) from its elements, given the following data. C(graphite) + O2(g) CO2(g) ΔH°rxn = -393.5 kJ/mol
To the alchemists, gold was the material representation of purity. It is a very soft metal that can be hammered into extremely thin sheets. If a 1.07 g piece of gold is hammered into a sheet whose a