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In the process of recrystallization, sometimes, it's necessary to scratch the side of the flask with a glass rod. What does this do?
what mass of calcium carbonate is required to react with 137.8 mL of a 0.6943 M sulfuric acid solution?
What is the solubility of lead fluoride in a solution of 0.050 M of sodium fluoride?
How might there still have been a chemical reaction even though they could not see anything happen?
To what final volume would 100 mL of 6.0 M NaCl have to be diluted in order to make "physiological saline" (0.54 M NaCl)
Calculate the weight of helium in pounds to fill a ballon whose capacity is 1.0 X10^6 ft^3 at 1 atm pressure and 27 C.
Would you expect a Diels-Alder reaction between maleic anhydride and naphthalene to require more or less harsh conditions
Assuming no elasticity forces in rubber, what volume should a 1.0L ballookn at 25 degree Celsius and 1.00 atm pressure be if immerses in liquid nitrogen
calculate the distance (m) that a molecule of He would diffuse under the same conditions for the same period of time.
If all the energy obtained by by burning 1.26 lb of butane (fuel value is 10.85 kcal/g) is used to heat 126.0 kg of water at an initial temp of 19.7C, what is the final temperature.
A sample of nitrogen gas in a 4.4-L container at a temperature of 35°C exerts a pressure of 3.7 atm. Calculate the number of moles of gas in the sample.
Hydrogenation of carbon double bonds C=C (i.e. adding a hydrogen on each carbon atom and thus reducing the double bond into a single bond: H-C-C-H) is a very common process in organic and polymer chemistry
The compression ratio of today's cars is so much higher than in cars of years past. What is the major advantage of increasing the compression ratio?
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