Help me timed test Manganese-56 has a half life of 2.6 hrs. How many g of a 13.3 g sample will remain after 8 half lives? Keep 2 sig figs, and be sure to use the correct units in your answer.

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

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

Why do oxygen have a strong attractive force for electrons