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Tell whether each of the experimental errors in excercise will affect the melting point of the unknown component. If it will, tell how it will affect the melting point and explain why
A water solution containing 2.00 g of an unknown molecular substance dissolved in 10.00 g of water has a freezing point of 4.0°C. a. Calculate the molality of the solution.
a piston has an external pressure of 10.0 atm. How much work has been done is the cylinder goes from a volume of 0.180 liters to 0.630 liters
A weather ballon is filled with helium to a volume of 305L at 28 degree celcius and 751 mmHg . The ballon ascends to and altitude where the pressure is 504 mmHg and temperature
A testing facility found that 8.35*10^23 molecules of carbon dioxide were produced when a sample of octane was burned in air. If this combustion process is known to produce an 86.7% yield, how many grams of octane were in the sample?
The density of a 23.0% by mass ethylene glycol (C_2 H_6O_2) solution in water is 1.03 g/mL. What is the molarity of the solution?
what is the pressure of H2 gas collected over water when the total pressure is .980 atm at 25 degrees celsius.
What monosaccharide is the C-2 epimer of alpha-D-galactose? Are these two molecules diastereomers?
How many molecules of HCCH react with 143 molecules of oxygen to produce carbon dioxide and water?
Fears of radiation exposure from normal use of such detectors are largely unfounded. Identify reasons why ^241Am smoke detectors are perfectly safe.
A 500.0 g sample of aluminium is initially at 25.0 °C. It absorbs 32.60 kJ of heat from its surroundings. What is its final temperature, in °C? (specific heat = 0.9930 J g-1 K-1 for aluminum)
Dimethyl ether, used as a solvent for extraction of organic compounds from aqueous solutions, has a high vapor pressure which makes it a potential fire hazard in labratories in which it is used
In the reaction of sodium benzoate with hydrochloic ac to form benzoic acid, if 1.29 g of benzoic acid were formed, how many mmol of sodium
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