Calculate [H3O+] in the following aqueous solution at 25 ∘C: [OH−]= 1.5×10−9 M . Express your answer using two significant figures.

Identify a specific example for each type of technology

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.

How do scientists think that gravity affected the formation of our solar system?