4Fe + 3O2à 2Fe2O3 is a balanced equation. What is the charge on each iron (Fe) ion in hematite (Fe2O3) ?

A. + 1

B. + 2

C. + 3

D. + 4

In the laboratory, a general chemistry student measured the pH of a 0.314 M aqueous solution of phenol (a weak acid), C6H5OH to be 5.269. Use the information she obtained to determine the Ka for this acid.

The name of acids that contain a polyatomic ion that have oxygen A. Oxyacids B. Oxion C. Hyperacids

An electromagnetic device used to determine the masses of individual atoms is

Given the following reaction: Cu + 2AgNO3 + 2Ag + Cu (NO3), 2 How many grams of Ag will be produced from 19.0 g of Cu and 125 g of AgNO3?

How many moles of NH3 can be produced from 13.5mol of H2 and excess N2?

How much ice at a temperature of - 17.5 ∘C must be dropped into the water so that the final temperature of the system will be 31.0 ∘C?

Why does a gas fill completely the vessel in which it is kept?

Individuals who work full time and those who work part-time enjoy basically the same number of paid leave benefits. True False

There is a large increase in ionization energy between the second and the third ionization energies of a metal. What kind of ion is the metal likely to form? Include the charge in your answer.

Which of the following are true statements about equilibrium systems? For the following reaction at equilibrium: CaCO3 (s) ⇌ CaO (s) + CO2 (g) adding more CaCO3 will shift the equilibrium to the right.