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Calculate the internal energy that must be added to a mole of helium gas to raise its temperature from 300k to 1000k
A buffer is made by combining 3.50 L of 0.200M butylamine, C4H9NH2 with 7.50L of 0.100M butylammonium chloride, C4H9NH3Cl. Assuming that volumes are additive
a blimp filled with 5000m3 of helium at20oc and 1.05 bar pressure. the volume of the cabin is30m3 and the mass of the
The titration required 10.51 mL of the KOH solution to reach an end point. What was the percentage by mass of K2SO3 in the original mixture of KNO3 and K2SO3?
If 5.50 mol calcium carbide reacts with an excess of water, how many moles of acetylene will be produced.
what is the entropy change for freezing 4.25 g of c2h5oh at 158.7 k? h -4600 jmol.answer in units of
A 5.00 L sample of air is collected at 500 degree F and 5.00 atm. What is the volume of STP
Asprin, whose structure can be found in the introduction, can be made from the reaction of a phenol and an anhydride. Give the phenol and anhydride that could be used to make aspirin?
What volume (in milliliters) of 0.240 M NaOH should be added to a 0.125 L solution of 0.029 M glycine hydrochloride
The product formed by the reaction of 3-methyl-1-butene with mercuric sulfate and sulfuric acid is?
What causes the heating that is seen in the thermosphere? What causes the heating that is seen in the stratosphere? What is the biological importance of ozone in the stratosphere?
A bag of fertilizer is labeled 15-20-5 (nitrogen-phosphorous-potassium). What is the actual percentage of phosphorous in the fertilizer
structures of all cycloalkenes that yield n-propyl cyclopentane when subjected to catalytic hydrogenation
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