Chemistry, 29.07.2019 18:30 spiritcampbell56
Astudent is told that both energy and mass must be conserved in every chemical reaction. she measures the mass of hydrochloric acid and a zinc strip separately. she then places the zinc strip into the acid and bubbles form as the zinc looks like it disappears. the combined mass afterward is less than the original. which of these can explain this result? a) the student must have not measured the mass correctly. b) the zinc disappears and therefore the mass is less after the reaction. c) this is not a chemical reaction so the conservation laws do not apply. d) the bubbles indicate that a gas is created and mass is loss as it escapes from the container.
Answers: 2
Chemistry, 22.06.2019 09:00, valeriekbueno
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?
Answers: 1
Astudent is told that both energy and mass must be conserved in every chemical reaction. she measure...
Physics, 27.10.2019 05:43
Biology, 27.10.2019 05:43
English, 27.10.2019 05:43
History, 27.10.2019 05:43