Ca + 2h2o → ca(oh)2 + h2 elemental calcium reacts with water at room temperature to form calcium hydroxide and hydrogen gas as shown in this equation. sodium undergoes a similar reaction with h2o. what would be the coefficient for sodium in a similar reaction? a) 1 b) 2 c) 3 d) 4

Thew  coefficient    for  sodium  in a  similar reaction   is   2 (answer B)

    Explanation

write  a  balanced  chemical  equation   between    sodium and water.

2 Na+ 2 H2O→  2NaOH +H2

coefficient is the number in front   of  a chemical formula.  it tell  how  many  molecules   or atoms of  a  given formula that  are  involved  in a  chemical equation.

The  coefficient  of Na  is 2  since  the   number in front  of Na  in  equation above is 2

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explanation:

+15-35=-20

going in opposite directions