Estimate the optimal number of neutrons for a nucleus containing 70 protons.

What is the change in the oxidation number of sulfur in the following reaction? Bi2S3 (s) + HNO3 (aq) → Bi (NO3) 3 (aq) + NO (g) + S (s) + H2O (l) A. - 3 to + 2, or + 5 B. - 2 to 0, or + 2 C. + 3 to - 3, or - 6 D. - 2 to - 3, or - 5

Aniline is produced by the hydrogenation of nitrobenzene. a small amount of cyclo-hexylamine is produced as a byproduct. the reactions are

Identify the following as an example of a physical property or a chemical property. Silver tarnishes when it comes into contact with hydrogen sulfide in the air. a) physical property b) chemical property

Renewable energy is an energy source that will not run out will not increase in cost will not cause pollution can be recycled

In what year did french chemist antoine lavoisier group the known elements into categories he called metals, nonmetals, gases, and earths?

A liquid would boil at the lowest temperature at a pressure of

The reaction 2HgO (s) ↽⇀ 2Hg (l) + O2 (g), you produce 1 mole of Hg (I). What is your percentage yield? A) 30% B) 20% C) 50% D) 100%

What are the concentrations of Cu2+, NH3, and Cu (NH3) 42 + at equilibrium when 18.8 g of Cu (NO3) 2 is added to 1.0 L of a 0.

Estimate the optimal number of neutrons for a nucleus containing 70 protons.

Students conduct an experiment in which steel wool is burned in a closed test tube. The steel wool reacts with an amount of oxygen equal to 1.43% of the mass of the steel wool. What is the correct value for the missing mass in the table?