What is the net ionic

charge for an oxygen ion

Which of these phrase from Elizabeth bishops poem "the fish" most shows her respect for the fish?

127) Thirty-six colonies grew in nutrient agar from 1.0 ml of undiluted sample in a standard plate count. How many cells were in the original sample?

Write a chemical equation for HCl (aq) showing how it is an acid or a base according to the Arrhenius definition. Express your answer as a chemical equation. Identify all of the phases in your answer.

What will the concentration of PCl5 be when equilibrium is reestablished after addition of 1.31 g Cl2? PCl5 (g) ⇆ PCl3 (g) + Cl2 (g) Original Equilibrium Mixture: 3.42 g PCl5 4.86 g PCl3 3.59 g Cl2 in a 1.00-L flask.

Which of these factors is least likely to determine whether a given solute dissolves in a given solvent? A. whether the solvent and solute are both polar B. whether the solvent and solute are both nonpolar C.

Which of the following statement best describes the energy change that takes place during deposition? A) Heat energy is released by the substance. B) Heat energy is maintained by the substance. C) Heat energy is slowly gained by the substance.

2. 2AgNO3 + CaCl2 → 2AgCl + Ca (NO3) 2 How much AgCl could be obtained starting with 100g of each reactant.

Combining 0.301 mol Fe2O3 with excess carbon produced 11.6 g Fe. Fe2O3+3C⟶2Fe+3CO What is the actual yield of iron in moles?

What is the frequency of an electromagnetic wave with energy of 5.0 x 10-20 J?

Which of the following is an example of how to supply activation energy to begin a reaction? a. Cool the reaction flask in an ice bath. b. Add a catalyst. c. Heat the reaction flask on a hot plate. d. Add an inhibitor. '