A chemist determined by measurements that 0.0500 moles of nickel participated in a chemical reaction. Calculate the mass of nickel that participated in the chemical reaction.

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.

What changes occur in the reaction indicated by the equation? check all that apply. the hydrogen nucleus loses protons. the oxygen nucleus gains protons. the bond in h2 is broken, and new bonds are formed between hydrogen and oxygen atoms. each electron associated with a hydrogen atom is shared with an oxygen atom.

One student said that the investigation was not valid (a fair test). write a plan for the investigation that includes improvements to the method and apparatus