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when companies sell compressed gas in steel cylinders, they usually quote the contents as volume of gas at 1 atm pressure at tempertaure of 20 degrees celcius. One such company sells cylinders said to contain 7 meters cubed of helium. The pressure in the cylinder is 15.5Mpa and interneal volume is 46.9L. Find the moles of helium gas in the cylinder.
How many grams of glucose are in 100. rm mL of the final solution?
An ice cube of 15.1 grams is placed into 304 grams of H 2 O. compute the change in temperature in the H 2 O upon completing melting of the ice.
How much heat was transferred from the tank? b) What is the final temperature of the tank contents? c) How much steam condensed, in kg? for a i found the difference in enthalpies but i cant figure out b, c
What is the major disadvantage of using concentrated sulfuric acid (or hydrochloric acid) rather than 85% phosphoric acid for the dehydration of alcohols?
Determine whether each of the examples or phrases describes an essential amino acid, a nonessential amino acid, or both essential and nonessential amino acids. A table of amino acids can be found here.
Ammonia and oxygen react to form nitrogen and water. How many grams of N2 can be produced when 6.30g O2 reacts?
A bone sample with 2.8 g of carbon has 17.4 disintegrations per minute. How old is the bone sample in years. What percentage of the atoms of carbon in the biosphere are C-14?
refrigerators are usually kept at about 5 c while room temperature is about 20 c. if you were to take an empty sealed
Determine all concentrations after 15 minutes. What is the chlorine concentration. What is Q after 15 minutes?
A particular system is doing work on the surroundings as well as gaining heat from the surroundings. What can be said about the values of q (heat) and w (work) for this system?
when a blue copper(II)nitrate solution is mixed with a colorless solution of sodium sulfide
Consider the following overall reaction which is experimentally observed to be second order in AB and zero order in C: AB + C ----> A + BC Determine whether the mechanism below is valid for this reaction.
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