In which chemical equation is the number of atoms in the reactants the same as the number of atoms in the products? A. Zn + 2HCl → H2 + ZnCl2 B. Li2CO3 → LiO + CO2 C. CO2 + H2O → CH2OH + O2 D. CH4 + O2 → CO2 + 2H2O

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 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.

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?