How much H2 gas at STP can be produced by the reaction
2 Na(s) + 2 H2O(l) –>H2(g) + 2NaOH(aq)
of 4.50 g of Na and excess water?
Answer in units of L. Your answer must be
within + 3.0%

Determine the  wavelength of light emitted when an electron  in an li2+ ion  makes a transition from an orbital with n  =  6 to an orbital with n  = 5.

Afraidsugar lol it’s the third one

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.