In a science demonstration, a teacher mixed zinc (zn) with hydrogen chloride (hcl) in a flask and quickly attached a balloon over the mouth of the flask. bubbles formed in the solution and the balloon inflated. what most likely occurred during this demonstration?

If you go to a nutrition store and buy a supplement, you can count on the fact that it is pure and safe because supplements are regulated, controlled, and inspected by the fda.

Which statement best describes who the period and frequency of electromagnetic was change between gamma rays and microwaves? a) the period and frequency stay the same. b) the period increases and the frequency decreases. c) the period decreases and the frequency increases. d) the period increases and the frequency increases.

The midpoints? a, b, and c are marked on the histogram. match them to the indicated scores. which? scores, if? any, would be considered? unusual?