Question

2Na + 2H2O = 2NaOH + H2.
how many moles of H2, could be made from 27.6g H2O?

Answer 1

A)27.6g H2O x (1 mole H2O/ 18.02g H2O) x (1 mole H2/ 2mole H2O)

= 0.766 mol H2 x 6.022 x 10^23

= 4.61 x10^23 molecules

B)12.9g H2O x (1 mole H2O/ 18.02g H2O) x (2 mole Na / 2mole H2O)

=0.716 mol Na x 6.022x 10^23

= 4.31 x 10^23 atoms

Step-by-step explanation:

I hope it's help