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?

The answer is 2

hope this helps

the atomic mass is the bottom number on the element.

-steel jelly

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.