Calculate the pH of a solution in which [H3O+]=9.5*10-9M. Express the pH of the solution to two decimal places.

A solution containing 2.8 moles of magnesium bromide is combined with a solution containing excess potassium carbonate. This chemical reaction takes place: MgBr2 (aq) + K2CO3 (aq) → MgCO3 (s) + 2KBr (aq). If the volume of the resulting solution is 1.

Suppose that from measurements in a microscope you determine that a certain bacterium covers an area of 1.50 pmº Convert this to square meters Express your answer in square meters. ishliste

An atom of a fictional element has the energy level diagram shown below. Which line will not appear on the total emission spectrum? Energy level diagram A. 0.9 eV B. 0.8 eV C. 0.7 eV D. 0.6 eV

Which set of coefficients would balance the following chemical equation? H3PO4 + RbOH → H2O + Rb3PO4 A. 2H3PO4 + RbOH → 3H2O + Rb3PO4 B. H3PO4 + 3RbOH → H2O + Rb3PO4 C. H3PO4 + RbOH → 2H2O + Rb3PO4 D. H3PO4 + 3RbOH → 3H2O + Rb3PO4

What is theWhat is the approximate tilt of the earth's axis? approximate tilt of the earth's axis?

What is the volume of 1 mile of gas at a standard temperature and pressure

Next to each formula, write the number of atoms of each element found in one unit of the compound

A particular atom has 58 protons and 82 neutrons. what are the atomic number, mass number, and periodic table symbol of this isotope?

Chemicals that are able to reduce activation energy in a reaction and speed the reaction rate are a. inhibitors. b. reactants. c. products. d. catalysts.

Lead had been used in plumbing and other products since ancient times. How have chemists contributed to our understanding of lead today? A. They have shown how lead can build up and cause damage in the human body. B.