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Suppose it is found that the actual molecular mass of your unknown solid is exactly two times larger than that which you determined experimentally. What could you conclude about the nature of your unknown solid and the assumptions you made in your calculations?
What mass of sucrose C 12 H 22 O 11 must be mixed with 543 grams of H 2 O to make a solution with an osmotic pressure =8.00 atm at the temperature of 12 degree celsius?
in experiment to find emperical formula of magnesium oxide, why the empty crucible and cover fired to red?
How many moles of methane (CH4) gas are in 745 mL at 25.5C and 730 torr?
How many molecules of HCCH react with 143 molecules of oxygen to produce carbon dioxide and water?
Draw stereo-formulas for the more stable chair conformation for both cis- and trans-4-tert-butylcyclohexanol and explain why each conformation is preferred.
what is the composition of vapor of a pentane-hexane solution that has a vapor pressure of 373 torr at 25 degree celcius? Given is Pure Hexanes and pentanes vapor pressure at 25 degrees celcius. Pentane - 511 torr. Hexane -150 torr.
The melting point of a pure compound is known to be 110-111°. Describe the melting behavior expected if this compound is contaminated with 5% of an impurity.
If 0.345 moles are produced during a reaction and collected at a temperature of 294K and pressire of .981 atm what volume will the gas occupy?
A gas is initially at 1.2 atm, 15.0 L, and O°C. What is the final pressure when the same amount of gas is heated to 10°C and the volume changed to 24.0 L
If the initial surface coverage is 8.9*10^16 molecules/cm^2, how long will it take for one-half of the film to evaporate? b. What fraction of the film is left after 10 s? Assume the same initial coverage as in part a.
According to the data, what is the value of delta H for the reaction.
Hypothetical metal M has a molecular weight 171 g/mol and crystallizes in a body-centered cubic array of atoms in which the length of the unit cell's edge is 547.3 pm
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