How much Cu-61 (half-life about 3 hours) would remain from a 2 mg sample after 6 hours?
A. 0.125 mg
B. 0.25 mg
C. 0.5 mg
O D. 1 mg

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

Which description best characterizes the motion of particles in a solid?

Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.