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The vapor pressure of water at 20 °C is 17.5 torr. A 11% solution of the nonvolatile solute ethylene glycol, C2H4(OH)2, in water is prepared. Calculate the vapor pressure of the solution to three significant figures.
What is the difference between a hypothesis and a theory? a hypothesis is a proposal that has been tested extensively, whereas a theory is an initialy stated proposal a hypothesis is a conclusion made after a theory was tested words hypothesis
A student was given a standard Fe(s) | Fe2+(aq) half-cell and another halfcell containing an unknown metal M immersed in 1 M MNO3(aq).
suppose 7.70g of methane is mixed with 54.7g of oxygen . Calculate the maximum mass of water that could be produced by the chemical reaction
what is the name and formula for a compound with a composition percent of 77.7% Fe, 22.3% O and a molar mass of 71.85
The half-life of Plutonium-239 is 24,000 years. If 10 gms are present now, how long will it take until only 10% of the original sample remains? Round your answer to the nearest 10,000th.
Question about States of Matter, Ian eats too many mars bars. To try to get rid of the excess kJ's he exercises in the gym by using a weights machine which works by compressing a cylinder of gas.
A 2.32 L balloon contains helium at 1.00 atm and 25°C. How many grams of helium are contained in the balloon.
A 0.456 gram sample of an unknown monoprotic acid (let's call it HZ) was dissolved in some water . Then the acidic solution was titrated to the equivalence point with 32.5 mL of 0.174 M KOH.
How much heat energy, in kilojoules, is required to convert 58.0 g of ice at -18.0 *C to water at 25.0 *C ?
In an acid/base titration, knowing that it took 13.14 mili litres of 0.1016 M sodium hydroxide, NaOH to reach the first endpoint of the titration,) from this information, mols of Phosphoric acid present in the sample is 1.335 mols.
What is the best and easy way to determine the frequency (in hz) of the interacting photon. A photon interacts with a ground state electron in a hydrogen atom and is absorbed.
In some solar-heated homes, heat from the sun is stored in rocks during the day and then released during the cooler night. (a) Calculate the amount of heat required to raise the temperature of 78.7 kg of rocks from 25.0°C to 43.0°C.
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