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How to calculate the mass of propylene glycol (C3 H8 O2 ) that must be added to 0.350 kg of water to reduce the vapor pressure by 2.87 torr at 40 C (P H2O at 40 C} = 55.3 torr?
You transfer a sample of a gas at 17*C from a volume of 5.67L and 1.10atm to a container at 37*C that has a pressure of 1.10atm. what is the new volume of the gas?
The pH of 0.5 M formic acic, HCOOH, is 2.02. Calculate the difference in pH when 6.42 g of HCOONa is added to 390.9 mL of 0.50 M formic acid. Ignore any changes in volume.
how much of the excess reactant remains after the limiting reactant is completely comsumed?
The second is defined as a fractional part of a mean solar day. Express one second as a fraction of a mean solar day based on your knowledge that there are 60 s in 1 min, 60 min in 1 h, and 24 h in one mean solar day.
1. the halide ion from HBr will act as the nucleophile in the first step of the reaction 2. the halide ion will act as the nucleophile in the second step of the reaction
A solution made from 6.50 g of an unkown compound in 27.8 g of diphenyl has a molality of 0.195 m. Calculate the molar mass of the unknown
A TLC plate showed two spots with Rf values of 0.25 and 0.26. The plate was removed from the developing chamber, the residual solvent was allowed to evaporate from the plate, and then the plate was returned to the developing chamber
what is the max amount of fructose that can be added to 1.5 kg pure water and still have the solution freeze?
a 10.0-g sample of ice at -20.0degc is mixed with 105.0 g of water at 75.0degc. calculate the final temperature of the
Determine the final state and temperature of 100g of water orginally at 25 dgree after 50 kj heat added to it. Ist water, water steam or steam
if h2 of 50.0 ml and c2h4 of 50.0 ml are permitted to react at the pressure of 1.5 atm produce c2h6 that has a volume
What bond angles do you expect for each of the following, and what kind of hybridization do you expect for the central at atom in each?
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