25. For the reaction: _N2 + _02 =_NO, balance the equation and determine the correct lowest mole ratio.

If 5 moles of N, reacted with 12 moles O, according to the above reaction, determine:
26. How many moles NO, are produced?
27. How many moles of N, are left in excess after the reaction (if any)?
28. How many moles of O, are left in excess after the reaction (if any)?

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .

With the largest atoms and the smallest number of valence electrons and with the smallest atoms and the greatest number of valence electrons are the most reactive. a. nonmetals; metals b. nonmetals; transition elements c. transition elements; metals d. metals; nonmetals

What does an electron configuration for an atom relate to the atoms placement on the periodic table