PLZ HELP THIS IS DUE TODAY In then given balanced chemical equation, a sample of copper (Cu) is reacted with nitric acid (HNO3).
Cu + 4HNO3 → Cu(NO3)2 + 2NO2 + 2H20

What mass of copper is required to produce 8.0 L of NO2 gas at STP?

What is the number of moles in 15.0 g ash3?

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?

How does a large body of water, such as the ocean, influence climate?