Rami is designing an experiment to study how the stored energy in an object affects its energy in motion. Which statement best describes why Rami should be careful about writing down his experimental procedure and results? The experiment can be changed by others to get different results.
The procedure and results can teach others how to do an experiment.
The exact experiment can be repeated by others, and the results can be compared.
The results will help compare the mechanical energy in different objects.

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?

Classify this reaction: 2al+n2-> aln.

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.