How do I find how many moles of HF it takes to react completely with 4.90 mol of SiO2? Thanks! 4 HF(g)+SiO2(s) ---> SiF4(g)+2H2O(l)

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

Which statement best describes the flow of energy in this scenario

How do cfcs cause ozone depletion? how do cfcs cause ozone depletion? ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule.