Igualar las siguientes ecuaciones químicas por el método de Tanteo y oxidorreducción. 1._Ácido nítrico + ácido sulfhídrico se obtiene ácido sulfúrico + monóxido de nitrógeno y agua.
2._Amoniaco + oxígeno se obtiene monóxido de nitrógeno y agua

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth