A student placed a piece of nickel metal into a beaker containing silver nitrate solution. After allowing the reaction to proceed for a few minutes, the nickel is removed and the silver that formed is filtered out using a funnel and filter paper.

If the mass of the products measured 120g what would the mass of the reactants a. 30g b. 60g c. 120g d. 240g

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

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?