How many moles of sodium cyanide are needed to react completely with 2.6 moles of sulfuric acid

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123

If many scientists conduct the same or similar experiments, and all obtain similar results, a can be written, which is a generally agreed-upon statement that explains and predicts how a natural phenomenon works.

What is the empirical formula of a compound that is 50.7% antimony and 49.3% selenium ?