Na + o2 --> na2o this is a balanced equation true false

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

Which are forms of frozen water? check all that apply. dew frost hail rain sleet