At 25 ∘C calculate the pH of a solution in which [H3O+]=9.5×10^-9

Express your answer to two decimal places.

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum

To apply in a gold the individual gold atoms are united to each other by means of a metallic bond. how would you use the gold block to determine the atomic radius of a gold atom?