How do balanced chemical equations show the
conservation of mass?
O They show that the atoms in the products
may be different than the reactants as long
as the mass does not change.
They show that the atoms in the products are
the same as in the reactants, but the number
of atoms must change.
They show that the number of atoms of each
element is the same in the products and
reactants.

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

100 points answer quick the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al