Copper(II) carbonate is broken down by heating to form copper(II) oxide and carbon dioxide gas. The equation for the reaction is shown. CuCO, → CuO + CO2 What is the percentage yield? 31.0g of copper(II) carbonate are heated until all of the contents of the test-tube have turned from green to black The yield of copper(II) oxide formed is 17.5g

If a 12-v battery is connected to a circuit that has a current of 3.0 a, what is the total resistance in the circuit? 36 ohms 4 ohms 0.25 ohms

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?

All forces cause motion? true or false