Cuo+h2 cu+h2o which is the reducing agent

What is the ph of a solution with a concentration of 5.2 × 10–8 m h3o+?

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer