9. Which is an agent of chemical
weathering that produces weak acids that
dissolve rock?
A burrowing animals
B lichens
с iсе
D pressure

What is the h+ concentration for an aqueous solution with poh = 4.01 at 25 ∘c? express your answer to two significant figures and include the appropriate units.

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?