During an investigation a scientist heated 27 g of mercuric oxide till it decomposed to leave a dry product. the total mass of the product formed was 25 g. does the law of conservation of mass hold true in this case? use complete sentences to justify your answer based on numerical calculations.

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely

Which of the following are appropriate acceleration units?