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A mercury thermometer consists of a small glass bulb containing mercury metal connected to a glass capillary tube. when the volume of mercury increases, the mercury moves up the capillary. Suppose the capillary tube is 0.4 mm in diameter and the total volume of mercury in the bulb and capillary is 0.30 cm 3 at a room temperature. if the thermometer is now placed in hot water and the length of the column of mercury in the capillary changes by 5.0 cm, what is the difference in temperature between the hot water and the room? the thermal expansivity of mercury is ß=1.8*10-4 K-1.
If 40.00mL of 0.4445M I2 was added to a sample containing vitamin C, the unused I2, required 23.95mL of .197M S2O3^2- to react. How many moles of vitamin C were originally present?
Many organic chemists when making a new solid compound often first try ethanol as a recrystallizing solvent. If soluable at room temperature, they simply add water and this often works! Why?
Calculate the molar concentration of NaNO3 and the mass percent of NaNO3 in the solution. What is the mole fraction of NaNO3 in the solution?
A 12 kg block of ice has a temperature of -10.0 degrees celsius. The pressure is one atmosphere. The block absorbs 4.50 times 10 to the sixth power J of heat. What is the final temperature of the liquid water?
A 10.0 long cylindrical glass tube, sealed at one end, is filled with ethanol. The mass of ethanol needed to fill the tube is found to be 11.90 . The density of ethanol is 0.789 . what is the inner diameter of cylinder?
What are 2 technological applications of Entropy, free energy and equilibrium. and explain
Compare the amount of A extracted by two extractions using 50 mL of diethyl ether each to the amount extracted by a single 100 mL extraction of the ether. Which is more efficient?
The rate constant for the production of glucose from cellulose with a newly developed catalyst was found to vary with temperature as shown by the data in teh following table. What is the activation energy for this reaction
the vapor pressure of liquid chloroform chcl3 is 400.0 torr at 24.1 degrees celsius and 100.0 torr at -6.3 degrees
question a sample of zns is reacted with hclaq to form hydrogen gas. the h2 gas bubbles out of aqueous solution and is
How many photons are required to heat 295 of coffee from 25.0 to 62.0 ? Assume that the coffee has the same density, 0.997 , and specific heat capacity, 4.184 , as water over this temperature range.
A sample of an unknown gas effuses in 11.9 min. An equal volume of H2 in the same apparatus at the same temperature and pressure effuses in 2.19 min. What is the molar mass of the unknown gas
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