Answer to Question #195330 in Chemistry for yousephhh

Question

In the reaction: 2Na + 2H2O → 2NaOH+ H2

How many grams of hydrogen (H2

) are produced if 5.2 mol of Na are available?

Answer 1

2Na + 2H₂O → 2NaOH+ H₂

According to the reaction, 2 moles of Na reacts to produce 1 mole of H₂.

From here:

n(H₂) = n(Na)/2 = 5.2 mol / 2 = 2.6 mol

Finally, the mass of H₂ produced:

m(H₂) = n(H₂) × Mr(H₂) = 2.6 mol × 2 g/mol = 5.2 g

Answer: 5.2 g