What do these two changes have in common

compost rotting

roasting a marshmallow

select all that apply

both are chemical changes

both are caused by cooling

both conserve mass

both involve chemical bonds breaking

What’s a special glass that most beakers are made of

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

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