A 20.0 g lead ball is heated in a Bunsen burner to 705 degrees celsius. It is then dropped into a 500.0 g water bath. What is the initial temperature of the water if the final temperature is 35 degrees celsius? The C of lead is 0.13 J/g degrees C.

Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)

Assuming complete dissociation of the solute, how many grams of kno3 must be added to 275 ml of water to produce a solution that freezes at -14.5 c? the freezing point for pure water is 0.0 c and k_f is equal to 1.86 c/m

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