What type of chemical reaction is this?

2Na + 2H20 - 2NaOH + H2

When the volume and number of particles of a gas are constant which of the following is also constant

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Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull