What is the oxidation state of the underlined element in the reaction: nahco3 + hcl → nacl + co_2 + h_2o select one: a. +1 b. +2 c. -1 d. 0 e. -2

How many neutrons does a atom of cobalt have?

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion