As you can see in the example, the volume in the gaseous state is higher than that in the liquid state at boiling. As a good approximation, we can ignore the initial volume occupied by the liquid. Now with 2.00 g of ethyl alcohol (molar mass = 46.1 g), assuming the gas is ideal, what is the change in internal energy as it vaporizes at its boiling point?

0.09 moles of sodium sulfate in 12 ml of solution

Imagine that twenty i.u.’s of enzyme z were catalyzing the above reaction for one minute, under vmaxconditions, in a 3.00 ml assay volume. the assay is buffered with 20 mm phosphate buffer, ph 7.60. what will the ph be at the end of that one minute?

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt